Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Efficiëntie van beregening : Een deskstudy naar kennis en inzicht ten aanzien van waterverliezen bij midden op de dag beregenen vergeleken met beregen in de nachtelijke uren
    Eertwegh, Gé van den; Bakel, Jan van; Massop, H.T.L. ; Dam, J.C. van; Bosveld, Fred ; Veldhuizen, A.A. - \ 2020
    KnowH2O - 38 p.
    Understanding possible causes of exceeding dioxin levels in palm oil by-products: An explorative study
    Taverne-Veldhuizen, Wilma ; Hoogenboom, Ron ; Dam, Guillaume ten; Herbes, Rik ; Luning, Pieternel - \ 2020
    Food Control 108 (2020). - ISSN 0956-7135
    Hydrogenated - Non-regulated dioxins - Oil refining - Palm - Palm fatty acid distillate - Regulated dioxins

    The Rapid Alert System for Food and Feed (period 1999–2014) reported exceeding levels of dioxins (polychlorinated dibenzo-p-dioxinsand dibenzofurans (PCDD/Fs)) in palm oil by-products, such as palm fatty acid distillate (PFAD) and hydrogenated palm fatty acid distillate (HPFAD), but not in crude and refined palm oil. The aim of the present study was to gain insight into the occurrence and congener profiles of dioxin contamination during industrial processing of crude palm oil into refined oil and its by-products PFAD and HPFAD via analysis of individual congener concentrations. In total, 1217 samples from an industrial process were collected at four different points, crude palm oil at delivery (N = 202), fresh bleaching earth before bleaching (N = 84), PFAD after deodorising palm oil (N = 553), and HPFAD after hydrogenation of PFAD (N = 378). Congener profiles were analysed by GC-HRMS, and toxic equivalent (TEQ) levels were calculated using toxic equivalence factors (TEF) of WHO2005 to assess non-compliance to legal limits. All dioxin levels in crude palm oil samples were far below the action limit. All dioxin levels in fresh bleaching earth were in compliance with the maximum level. For the by-product samples, such as PFAD, 0.6% exceeded the action level, but all were below the maximum level (ML). However, for 1.3% of the HPFAD samples, the TEQ level exceeded the ML. In-depth analysis of the congener profiles revealed that after the hydrogenation step, the concentration of the lower chlorinated congeners in the HPFAD samples was higher than in the PFAD samples. The hydrogen atoms possibly replaced the chlorine atoms during hydrogenation. As these lower chlorinated congeners have a higher TEF, when they are regulated, their contribution to the calculated TEQ is higher, which resulted in some HPFAD samples exceeding the legal limit. Further research is needed to obtain insight into the changes in PCDD/F congener profiles during the hydrogenation of palm oil products.

    The Missing Middle: Connected action on agriculture and nutrition across global, national and local levels to achieve Sustainable Development Goal 2
    Veldhuizen, L.J.L. ; Giller, K.E. ; Oosterveer, P.J.M. ; Brouwer, I.D. ; Janssen, S.J.C. ; Zanten, H.H.E. van; Slingerland, M.A. - \ 2020
    Global Food Security 24 (2020). - ISSN 2211-9124 - 6 p.
    SDG2 - Food systems - Sustainable agriculture - Food security - Pathways - Stakeholders
    Sustainable development goal 2 (SDG 2) challenges the world to connect food production and consumption in a way that matches local contexts and enables everyone to enjoy a healthy diet that is produced sustainably and contributes to the other SDGs. We identify a Missing Middle between food production and consumption, and between globally defined goals and local implementation practices that may hinder progress towards SDG 2. Examples of this Missing Middle and how it can be bridged demonstrate that key challenges should be addressed in a more integrated manner for more effective action on SDG 2. We encourage actors in food provisioning to start addressing the Missing Middle by collaborating with relevant stakeholders in specified cases.
    Online crop growth modelling in MODFLOW Using SWAP-WOFOST
    Veldhuizen, A.A. ; Walsum, P.E.V. van - \ 2019
    - 1 p.
    Relevance of MODFLOW6 for Wageningen models
    Veldhuizen, Ab - \ 2019
    Technical feasibility of the coupling between MODFLOW6 and metaSWAP
    Walsum, P.E.V. van; Veldhuizen, Ab - \ 2019
    Modellering van het Bodem-Water-Atmosfeer-Plant systeem
    Veldhuizen, Ab - \ 2019
    Visie op de onverzadigde zone modellering
    Veldhuizen, Ab - \ 2019
    Nederlanders gooien steeds minder eten weg – Klopt dit wel?
    Herpen, Erica van - \ 2019
    E-conferences om kennis te vertalen naar de praktijk
    Veldhuizen, L.J.L. - \ 2019
    Presentatie in sessie: - Routekaart voor een SDG-proof voedselsysteem in Nederland
    Vast, misschien
    Kersten, A.H. - \ 2019

    Ook online verschenen als: Vastendieet kan kanker voorkomen - Klopt dit wel?

    Zuivere lucht
    Middelaar, C.E. van - \ 2019

    Ook online verschenen als: Gras van melkveehouderijen ‘zuivert de lucht’ en ‘slaat 20 duizend kilo CO2 op’ – Klopt dit wel?

    SDSN e-conference June 2019
    Veldhuizen, Linda - \ 2019
    An explorative study on a university’s outreach in the field of UN Sustainable Development Goal 2
    Jetten, Theo H. ; Veldhuizen, Linda J.L. ; Siebert, Mark ; Ommen Kloeke, A.E.E. van; Darroch, Peter I. - \ 2019
    Wageningen : Wageningen University & Research - 22
    This research explores whether and how the societal impact of research can be demonstrated by using proxy measures such as mentions of research in mainstream news media, social media and in policy documents. We explore the use of these measures within the research domain related to SDG 2 as a way to: compare performance against peer institutes and researchers; explore correlations between news media mentions, social media mentions and other more traditional ‘academic’ impact indicators such as citation counts; and explore whether relative scientific quality or news media / social media attention increases the likelihood of being used in policy documents through a case study that focuses on a key policy document produced by the Food and Agriculture Organisation (FAO) of the United Nations.Our results show that no clear relationship can be distinguished between scholarly output or various proxies of scientific quality with news media mentions. This result demonstrates that scientific quality does not necessarily translate into news media or social media mentions. Hence, universities and researchers need to actively invest in outreach to improve the contribution of research, researchers and research institutes to society. In addition, departments dealing with scientific benchmarking need to collaborate more closely with communication departments as universities may reconsider the way they organize their outreach to society.Articles cited by the policy document had higher values for citation metrics and had more Mendeley readers, tweets, Facebook mentions, blog mentions and news mentions than articles in the reference set that this policy document would have sourced from. The higher number of social media and news media mentions for the FAO references could have contributed to their uptake by the FAO policy document. However, this higher number could also be a result of the higher scientific quality of the FAO references. Researchers and research institutes are advised to consider joining the writing committee of relevant policy documents for more influence on policy making. There is a benefit to both software developers and policymakers to improve the visibility of policy documents for analysis as the coverage of policy documents is still limited. New insights based on a comprehensive analysis of more policy documents could trigger institutes to actively re-think the way they interact with policy and policymakers.
    Effecten van onderwaterdrainage op de regionale watervraag : berekeningen met het Landelijk Hydrologisch Model
    Rozemeijer, Joachim ; Boomsma, Huite ; Veldhuizen, Ab ; Pouwels, Janneke ; Akker, Jan van den; Kroon, Timo - \ 2019
    Delft : Deltares - 66
    In het veenweidegebied is het verminderen van maaivelddaling een belangrijk thema.Onderwaterdrainage wordt gezien als een mogelijkheid om de laagste grondwaterstanden te verhogen en is daarmee eenvan de mogelijkheden om maaivelddaling te verminderen. Het doel van dit onderzoek was de verandering in de watervraag in droge perioden door onderwaterdrainage voor een deel van West-Nederlandin beeld te brengen. Er is gebruik gemaakt vanhet Landelijk Hydrologisch Model (LHM-versie3.4.0) voor het doorrekenen van scenario’s (1) met en zonder onderwaterdrainage, (2) met huidig en toekomstig klimaat (GL en WH) en (3) meten zonder dynamisch peilbeheer.Dein het modelgebruikte drainage-en infiltratiedoorlatendheden zijn ingeschat op basis van meetresultaten uit lokalepilots. Om de effecten van onderwaterdrainage duidelijk te maken focussen we op de verandering in de watervraag voor peilhandhaving in peilvakken die voor minimaal 10% geschikt zijn voor onderwaterdrainage. De resultaten laten zien dat dezewatervraag in een droge periode toeneemt met ongeveer 0.09 mm/dag. De totale watervraag voor peilhandhaving voor deze gebieden is 1.16 mm/dag in dereferentiesituatie, waarmee de relatieve toename uitkomt op ca. 8%. De watervraag voor het gehele beheergebied van de West-Nederlandse waterschappen is 0.66 mm/dag. De extra watervraag voor peilhandhaving door onderwaterdrainage voor het gehele gebied is dan ook ongeveer 0.03 mm/dag (ca. 4%). Bij deze berekening is uitgegaan van een gemiddeld effect van 5-10 cm verhoging van de laagste grondwaterstanden die voorkomt uitpraktijkpilots. Als de infiltratie-effectiviteit van onderwaterdrainage vergroot wordt,bijvoorbeeld door verbeterde aanleg of door pompgestuurde onderwaterdrainage (drukdrains),dan zalhet effect op de laagste grondwaterstanden ende watervraag toenemen. Bij een gemiddelde verhoging van de laagste grondwaterstanden van30-40 cmverwachten we een extra watervraag van ongeveer 0.4 mm/dag (ca. 36%). Voor de gehele West-Nederlandse waterschappen komt dit neer op een extra watervraag van ongeveer 0.11 mm/dag (ca. 18%).De resultaten uit het model moeten gezien worden als een indicatieve kwantificering van de effecten van onderwaterdrainage. Er is behoefte aan meer meetinformatie over de effecten van onderwaterdrainage over langere perioden en in droge jaren en over de effecten op waterfluxen en waterkwaliteit. Deze meetinformatie kan gebruikt worden om ook de effecten op groter schaalniveau beter te kwantificeren.
    Exploration of the importance of physical properties of Indonesian peatlands to assess critical groundwater table depths, associated drought and fire hazard
    Taufik, M. ; Veldhuizen, A.A. ; Wösten, J.H.M. ; Lanen, H.A.J. van - \ 2019
    Geoderma 347 (2019). - ISSN 0016-7061 - p. 160 - 169.
    Local people livelihood - Peatland hydrology - Revegetation - Revitalisation - Rewetting - Soil-water-atmosphere-plant modelling - Water retention

    Widespread degradation of Indonesian peatlands by deforestation and excessive drainage results into more frequent fires, particularly in El Niño years, which causes: (i) release of enormous amounts of peat soil carbon to the atmosphere, impacting climate, (ii) severe air pollution, affecting human health and air traffic, and (iii) decreased ecosystem services through loss of biodiversity. Groundwater table decline is the main driver of these negative processes and, therefore restoration of peatland hydrology is essential. Although groundwater table depth is critical to counteract peatland degradation, optimal depths are not generic for all peatlands, but depend on peat physical properties (i.e. water retention, unsaturated conductivity), which are related to the degree of peat humification (Fibric, Hemic, Sapric). Unfortunately only few of these peat physical properties are available while they are essential input data in hydrological models required to extend the usually short observed groundwater hydrographs. An experiment with the Soil-Water-Atmosphere-Plant model (SWAP) for two locations in Indonesian peatlands illustrates the impact of the degree of peat humification on physical properties and thereby on calculated groundwater table depth, hydrological drought and associated fires hazards. The Variable Threshold Method is applied to convert groundwater table depths into hydrological drought, and next the modified Keetch-Byram Drought Index (mKBDI) is used to assess wildfire hazard. Peat physical properties that reflect higher peat humification (Hemic and Sapric) result into lower water tables during dry periods, in particular during El Niño years, more severe hydrological drought, and an earlier and longer fire season. Using the limited available peat physical properties the importance is demonstrated of initiating a comprehensive programme to build a database of peat physical properties covering different environmental conditions in which tropical peatlands occur. Availability of such a database connected to a long-term monitoring programme, will support the ongoing rewetting, revegetation and revitalisation programme for Indonesian peatlands, which eventually will contribute to sustainable livelihoods for local people and reduce impact on the regional climate.

    The contribution of biorefineries to rural development: the case of employment in Hungary
    Heijman, W.J.M. ; Szabo, Zoltan ; Veldhuizen, Esther - \ 2019
    Studies in Agricultural Economics 121 (2019). - ISSN 1418-2106 - 12 p.
    biofuels - biofuel policies - ethanol - rural development - input-output analysis - employment
    Most recent research concerning biofuels focuses on their potential for mitigating climate change, while their rural development dimension is given less prominence. Ongoing policy debates, including EU and US biofuel policies, pay little attention to this feature of the industry. This paper explores the impact of biorefineries on rural development, and employment in particular. It shows that biorefineries can have a considerable economic impact on the regions in which they are located. Embedded in the local social and economic fabric, the paper demonstrates their influence on regional and national labour markets. The case of a bioethanol plant in Hungary and its effect on the rural labour market in two counties of the country is studied by way of an input-output model. The research has found that the operation of a biorefinery stimulates the creation and maintenance of jobs in both farming and service industries. Results suggest that biorefineries are an important driver of rural development and that this aspect of the industry should be given greater weight in formulating biofuel policies.
    WUR and UN SDSN: How can we work together on the SDGs?
    Veldhuizen, L.J.L. - \ 2019
    Good practice in food-related neuroimaging
    Smeets, Paul A.M. ; Dagher, Alain ; Hare, Todd A. ; Kullmann, Stephanie ; Laan, Laura N. van der; Poldrack, Russell A. ; Preissl, Hubert ; Small, Dana ; Stice, Eric ; Veldhuizen, Maria G. - \ 2019
    American Journal of Clinical Nutrition 109 (2019)3. - ISSN 0002-9165 - p. 491 - 503.
    aroma - data sharing - food choice - food viewing - functional magnetic resonance imaging - good practice - neuroimaging - satiation - taste

    The use of neuroimaging tools, especially functional magnetic resonance imaging, in nutritional research has increased substantially over the past 2 decades. Neuroimaging is a research tool with great potential impact on the field of nutrition, but to achieve that potential, appropriate use of techniques and interpretation of neuroimaging results is necessary. In this article, we present guidelines for good methodological practice in functional magnetic resonance imaging studies and flag specific limitations in the hope of helping researchers to make the most of neuroimaging tools and avoid potential pitfalls. We highlight specific considerations for food-related studies, such as how to adjust statistically for common confounders, like, for example, hunger state, menstrual phase, and BMI, as well as how to optimally match different types of food stimuli. Finally, we summarize current research needs and future directions, such as the use of prospective designs and more realistic paradigms for studying eating behavior.

    Agrohydrological analysis of groundwater recharge and land use changes in the Pampas of Argentina
    Kroes, Joop ; Dam, Jos van; Supit, Iwan ; Abelleyra, Diego de; Verón, Santiago ; Wit, Allard de; Boogaard, Hendrik ; Angelini, Marcos ; Damiano, Francisco ; Groenendijk, Piet ; Wesseling, Jan ; Veldhuizen, Ab - \ 2019
    Agricultural Water Management 213 (2019). - ISSN 0378-3774 - p. 843 - 857.
    Argentina - Capillary rise - Groundwater recharge - Land use - Pampas - Soybean - SWAP - WOFOST

    This paper studies the changes of groundwater, climate and land use in the Pampas of Argentina. These changes offer opportunities and threats. Lowering groundwater without irrigation causes drought and successive crop and yield damage. Rising groundwater may alleviate drought as capillary rise supports root water uptake and crop growth, thus narrowing the difference between potential and actual yields. However, rising groundwater may also limit soil water storage, cause flooding in metropolitan areas and have a negative impact on crop yields. Changing land use from continuous soy bean into crop rotations or natural vegetation may decrease groundwater recharge and thus decrease groundwater levels. In case of crop rotation however, leaching of nutrients like nitrate may increase. We quantified these impacts using integrated dynamic crop growth and soil hydrology modelling. The models were tested at field scale using a local dataset from Argentina. We applied distributed modelling at regional scale to evaluate the impacts on groundwater recharge and crop yields using long term weather data. The experiments showed that threats arise from continuous monotone land use. Opportunities are created when a proper balance is found between supply and demand of soil water using a larger differentiation of land use. Increasing the areas of land use types with higher evapotranspiration, like permanent grassland and trees, will contribute to a more stable hydrologic system with more water storage capacities in the soil system and lower groundwater levels. Modelling tools clearly support the evaluation of the impact of land use and climate change on groundwater levels and crop yields.

    The Missing Middle in SDG 2: The dual disconnect between global goals and local contexts, and between food production and consumption
    Veldhuizen, L.J.L. ; Giller, K.E. ; Boer, I.J.M. de; Oosterveer, P.J.M. ; Brouwer, I.D. ; Janssen, S.J.C. ; Zanten, H.H.E. van; Slingerland, M.A. - \ 2018
    Session S6
    Barilla international forum on food and nutrition
    Veldhuizen, Linda - \ 2018
    Panel discussion on sustainable food systems at city level
    Research and the UN SDGs : Contribution to the United Nations Sustainable Development Goals through research funded by the Dutch Ministry of Agriculture, Nature and Food Quality
    Bouwma, Irene ; Veldhuizen, Linda ; Vugt, Simone van; Dias Bernardes Gil, Juliana ; Sluis, Theo van der; Booij, J. ; Jetten, T.H. ; Togt, P.L. van der - \ 2018
    Wageningen : Wageningen University & Research - 11
    Fish welfare in capture fisheries : A review of injuries and mortality
    Veldhuizen, L.J.L. ; Berentsen, P.B.M. ; Boer, I.J.M. de; Vis, J.W. van de; Bokkers, E.A.M. - \ 2018
    Fisheries Research 204 (2018). - ISSN 0165-7836 - p. 41 - 48.
    Animal welfare - Commercial fisheries - External damage - Fishing gear - Teleost fish
    Concerns about the welfare of production animals have extended from farm animals to fish, but an overview of the impact of especially capture fisheries on fish welfare is lacking. This review provides a synthesis of 85 articles, which demonstrates that research interest in fish welfare in capture fisheries has increased over time and that research has focused more on trawls and hooks than on purse seines, gillnets, traps and seines. We found that various gear characteristics, fish characteristics and context variables affect external injuries and mortality. Although the influence of gear characteristics on injuries and mortality can by nature not be compared across gear types, synthesis of the articles reviewed shows that fish characteristics and context variables influence injuries and mortality across gear types. In terms of fish characteristics, decreasing fish length and certain fish species were associated with higher mortality. In terms of context variables, greater capture depth and a longer fishing duration were associated with more injuries and higher mortality, whereas a large change in water temperature, a longer duration of air exposure and a high density in the net were associated with higher mortality. These relations provide options to reduce injuries and mortality from commercial capture fisheries. Implementation of such options, however, would require analysis of potential trade-offs between welfare benefits, and ecological and economic consequences.
    The Missing Middle in Sustainable Development Goal 2
    Veldhuizen, L.J.L. ; Boer, I.J.M. de; Brouwer, I.D. ; Giller, K.E. ; Janssen, S.J.C. ; Oosterveer, P.J.M. ; Slingerland, M.A. ; Zanten, H.H.E. van - \ 2017
    World Café on the Missing Middle in Sustainable Development Goal 2
    Veldhuizen, Linda - \ 2017
    Scientific and data challenges in addressing SDG 2: the Missing Middle
    Veldhuizen, Linda - \ 2017
    Hoe duur is natuur : VPRO Tegenlicht
    Hein, L.G. ; Veldhuizen, D. - \ 2017
    VPRO
    Alles van waarde is weerloos. Dat geldt zeker voor de natuur, waar we steeds meer van kwijtraken.
    Cathelicidins inhibit Escherichia coli-induced TLR2 and TLR4 activation in a viability-dependent manner
    Coorens, Maarten ; Schneider, Viktoria A.F. ; Groot, A.M. De; Dijk, Albert I.J.M. Van; Meijerink, Marjolein ; Wells, Jerry M. ; Scheenstra, Maaike R. ; Veldhuizen, Edwin J.A. ; Haagsman, Henk P. - \ 2017
    The Journal of Immunology 199 (2017)4. - ISSN 0022-1767 - p. 1418 - 1428.

    Activation of the immune system needs to be tightly regulated to provide protection against infections and, at the same time, to prevent excessive inflammation to limit collateral damage to the host. This tight regulation includes regulating the activation of TLRs, which are key players in the recognition of invading microbes. A group of short cationic antimicrobial peptides, called cathelicidins, have previously been shown to modulate TLR activation by synthetic or purified TLR ligands and may play an important role in the regulation of inflammation during infections. However, little is known about how these cathelicidins affect TLR activation in the context of complete and viable bacteria. In this article, we show that chicken cathelicidin-2 kills Escherichia coli in an immunogenically silent fashion. Our results show that chicken cathelicidin-2 kills E. coli by permeabilizing the bacterial inner membrane and subsequently binds the outer membrane-derived lipoproteins and LPS to inhibit TLR2 and TLR4 activation, respectively. In addition, other cathelicidins, including human, mouse, pig, and dog cathelicidins, which lack antimicrobial activity under cell culture conditions, only inhibit macrophage activation by nonviable E. coli. In total, this study shows that cathelicidins do not affect immune activation by viable bacteria and only inhibit inflammation when bacterial viability is lost. Therefore, cathelicidins provide a novel mechanism by which the immune system can discriminate between viable and nonviable Gramnegative bacteria to tune the immune response, thereby limiting collateral damage to the host and the risk for sepsis.

    Consumer interest in social sustainability issues of whitefish from capture fisheries in the north-east Atlantic
    Veldhuizen, Linda J.L. ; Lans, Ivo A. van der; Berentsen, Paul B.M. ; Boer, Imke J.M. de; Bokkers, Eddy - \ 2017
    Fish and Fisheries 18 (2017)3. - ISSN 1467-2960 - p. 527 - 542.
    Choice modelling - concern - consumer preferences - relevance - trust - values

    Capture fisheries in the north-east Atlantic account for approximately 10% of all fish consumed from capture fisheries globally. The literature shows that consumers show considerable interest in social sustainability of products in general and of fish specifically. This interest, however, has not yet been investigated for fish from the north-east Atlantic. The first objective of this study, therefore, was to investigate whether consumers are interested in social sustainability issues of whitefish from the north-east Atlantic by determining preferences for four social sustainability issues with distinct benefits in relation to a known reference point (i.e. approach to overfishing). The second objective of this study was to determine to what degree case-specific and general psychographic consumer characteristics explain preferences for these issues. Choice modelling results from an online survey among 457 Dutch consumers show that consumers have the strongest preference for the environmental sustainability issue approach to overfishing. In addition, results on the social sustainability issues showed that consumers prefer fish welfare over product quality, worker safety and local employment, indicating that in this case, consumers place animal benefits over personal, worker and community benefits. The case-specific psychographic characteristic concern contributed most to explaining preferences for the environmental sustainability issue, whereas the general psychographic characteristic personal relevance contributed most to explaining preferences for the social sustainability issues. This result is likely explained by the principal focus on MSC certification in markets for fish products, which caused consumers to form opinions (e.g. concern) on overfishing, but not on social sustainability.

    Understanding social sustainability of capture fisheries
    Veldhuizen, Linda J.L. - \ 2017
    Wageningen University. Promotor(en): Imke de Boer, co-promotor(en): Paul Berentsen; Eddy Bokkers. - Wageningen : Wageningen University - ISBN 9789462579644 - 159
    fisheries - sustainability - animal welfare - cod - haddock - fishing methods - whitefish - northeast atlantic - visserij - duurzaamheid (sustainability) - dierenwelzijn - kabeljauw - schelvis - vismethoden - houting - noordoost atlantische oceaan

    Fishing companies are faced with decreasing profitability and increasing competition. These companies can try to gain a competitive advantage by differentiating their products, e.g. by marketing new product attributes that consumers are interested in such as attributes relating to sustainability. Although consumers could be considerably interested in social sustainability of fish, this sustainability dimension has received little research interest so far. The main objective of this thesis is to understand social sustainability of capture fisheries. Social sustainability can be understood by applying the framework for social sustainability assessment, which consists of stakeholder consultation and issue selection, indicator development and quantification, and interpretation of the results, to the case considered. The case considered in this thesis was capture fisheries in the northeast Atlantic. Stakeholder consultation resulted in the identification of 27 social sustainability issues relevant for capture fisheries in the northeast Atlantic. Overall, social sustainability issues concerning working conditions, employees' job fulfilment and fish welfare were seen as more important than other social sustainability issues. Indicators were defined for the most important social sustainability issues of capture fisheries in the northeast Atlantic. To interpret values for each indicator, rubrics were developed that articulated levels of performance. Application of these indicators and their accompanying rubrics to a Norwegian trawler demonstrated that the indicators and rubrics provide insight into social sustainability at the level of the vessel, which can be used to identify potential room for improvement. To determine whether social sustainability issues can be used for product differentiation, consumer interest in social sustainability issues of whitefish from the northeast Atlantic was studied. Results from a choice modelling survey demonstrated that consumers prefer the issue fish welfare over the issues product quality, worker safety and local employment. Given the lack of overview of the knowledge on fish welfare, the most important social sustainability issue for consumers, the literature on this topic was reviewed to determine how the capture process in capture fisheries affects fish welfare, using the indicators external injuries and mortality. This review showed that scale, skin and fin injuries occur more frequently in trawls, purse seines, gillnets, traps and seines than in hooks, whereas hooking injuries occur in hooks only. Pressure injuries can occur in all gear types when deployed at greater depth. Trawls, purse seines and seines result in higher mortality than gillnets, hooks and traps. Mortality appears to increase with decreasing fish length, and differs across fish species. A greater capture depth and a longer fishing duration were associated with more external injuries and higher mortality, whereas a large change in water temperature, a longer duration of air exposure and a high density in the net were associated with higher mortality only. This thesis shows that application of the framework for social sustainability assessment to capture fisheries in the northeast Atlantic leads to an understanding of social sustainability that fishing companies can use to their advantage. In addition, this thesis shows that fishing companies in the northeast Atlantic need to start paying attention to fish welfare because consumers consider fish welfare the most important social sustainability issue of capture fisheries in the northeast Atlantic.

    SIMGRO-Sobek : Simulatie van inundatie met SIMGRO en Sobek
    Veldhuizen, Ab - \ 2016
    Het Hoogheemraadschap De Stichtse Rijnlanden heeft de Kockengen casus doorgerekend met meerdere modelconcepten: 3Di, Sobek-Simgro, Hec-Ras, Wolk, in4d, etc. Dit heeft een grote oogst aan interessante inzichten opgeleverd die het hoogheemraadschap graag wil delen en bediscussiëren. Daarom organiseerde het Hoogheemraadschap i.s.m. STOWA op dinsdag 22 november 2016 het symposium 'Inundatie? Reken maar!', om te ontdekken hoe we inundaties kunnen simuleren en om van gedachten te wisselen over welke simulatiemodellen op dit vlak boven het maaiveld uitsteken
    Casus Wateroverlast Kockengen 28 juli 2014
    Veldhuizen, Ab - \ 2016
    Effectief inlaatregiem zoetwatervoorziening Pilot modellering €ureyeopener voor het Hoogheemraadschap Hollands Noorderkwartier
    Schipper, Peter ; Veldhuizen, Ab ; Kroes, Joop - \ 2016
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research rapport 2757) - 35
    waterbeheer - zoet water - regionaal beleid - verzilting - beschadigingen door zout - landbouw - noord-holland - polders - water management - fresh water - regional policy - salinization - salt injury - agriculture - noord-holland - polders
    In de Nederlandse delta is een uitgekiend waterbeheer van wezenlijk belang voor veiligheid en zoetwatervoorziening. Nu het klimaat verandert en kapitaal intensievere landbouw en andere watergebruikers meer zekerheid willen over de levering van zoet water, is de vraag hoe de zoetwatervoorziening kan worden verbeterd en robuust kan worden gemaakt. In veel gebieden hebben de waterbeheerders nog geen goed overzicht hoe het complexe systeem van zoetwateraanvoer tijdens droge perioden functioneert. Dit komt omdat de zoet-zoutpatronen sterk van plaats tot plaats verschillen, inlaten vaak diffuus van aard zijn en niet worden bemeten en watergebruik voor beregening niet wordt geregistreerd. Zij weten daarom in veel gebieden niet hoe effectief het huidige inlaatregiem is en welke maatregelen geschikt zijn om de zoetwatervoorziening te verbeteren. Het modelconcept de €ureyeopener is ontwikkeld om inzichten te bieden in de effectiviteit van de huidige zoetwateraanvoer en effecten van maatregelen. Het model berekent de wateraanvoerbehoefte, zoutgehalten, gewasschades en de kosten en baten van maatregelen. Voor het Hoogheemraadschap Hollands Noorderkwartier (HHNK) zijn de toepassingsmogelijkheden van dit modelconcept voor HHNK onderzocht door voor de Anna Paulownapolder een €ureyeopener model te maken. In dit gebied spelen voor HHNK nadrukkelijk beleidsvragen voor het voorzieningenniveau, de effecten van de nieuwe sluis bij IJmuiden, slim water management (efficiënter doorspoelen) en de extra zoet watervraag vanuit het Markermeer. Tot vóór de modelstudie had HHNK weinig zicht op de effectiviteit van het doorspoelregiem en de consequenties daarvan voor beregening en mogelijk optredende zoutschade. Het opgezette model geeft transparant inzicht in de uitwerking van het doorspoelregiem en de opbrengstderving van gewassen als het zoutgehalte van het polderwater verandert. In deze rapportage worden de stappen en het resulterende model beschreven. Ten opzichte van eerdere modellen is specifiek aandacht besteed aan de modellering van tulpen en de wijze waarop in het model de waterinlaat kan worden geoptimaliseerd. Met het oog op de samenwerking met Deltares en Bakelse Stroom voor het ontwikkelen van regio-specifieke €ureyeopener modellen hebben zij meegewerkt aan een interne werksessie om een conceptversie van het model te beoordelen en verbeterpunten te identificeren. Ook heeft Deltares bijgedragen aan het formuleren van aanbevelingen.
    Chemisch-fysische schematisering van de bodem voor NHI-waterkwaliteit : naar een nieuwe fysisch-chemische schematisering van de Nederlandse bodem
    Bolt, Frank van der; Walvoort, Dennis ; Vries, Folkert de; Hoogland, Tom ; Vroon, Henk ; Groenendijk, Piet ; Renaud, Leo ; Massop, Harry ; Veldhuizen, Ab ; Walsum, Paul van - \ 2016
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research rapport 2753) - 34
    bodem - bodemkwaliteit - hydrologie - bodemeigenschappen - bodemkarteringen - soil - soil quality - hydrology - soil properties - soil surveys
    Voor de ontwikkeling van het Nationaal Hydrologisch Instrumentarium-waterkwaliteit is een aanpak opgesteld om de fysisch-chemische schematisering van de bodem in Nederland verder te ontwikkelen. Op korte termijn (2017-2018) is een pragmatische werkwijze nodig om de bodemchemische parameters met bijbehorende schematisering in representatieve eenheden voor de operationele toepassing voor landelijke beleidsstudies te actualiseren. Het gebruik van de huidige fysischchemische karakterisering voor de bodemkaart 1:50.000 vormt de geëigende methode. Op de langere termijn is het de wens om het Nationaal Hydrologisch Instrumentarium-waterkwaliteit ook te kunnen inzetten voor regionale toepassingen. Dit kan alleen als er een gedetailleerde geostatistisch gesimuleerde 3D-bodemkaart aan ten grondslag ligt die recht doen aan regionale variabiliteit van de bodem.
    Nowcasten actuele vullingsgraad bodem (met behulp van een model en remote sensing data)
    Toorn, Linda ; Klutman, W.A.J. ; Hanhart-van den Brink, M. ; Heijkers, J. ; Bakel, J. van; Bastiaanssen, M. ; Spijker, Maarten ; Veldhuizen, A.A. - \ 2016
    Amersfoort : Stowa (Stowa rapport 2016-20) - 57
    waterbeheer - waterbergend vermogen - remote sensing - wateropslag - ondergrondse opslag - grondwaterstand - water management - water holding capacity - remote sensing - water storage - underground storage - groundwater level
    Een belangrijke opgave van de waterschappen is het voorkomen van wateroverlast en droogte. In deze studie is onderzocht of het haalbaar is om een instrument te ontwikkelen waarmee de hoeveelheid water die in de bodem kan worden geborgen, inzichtelijk kan worden gemaakt. Het gaat hierbij om een combinatie van data van satellieten (over verdamping en bodemvocht), aangevuld met data uit het veld en data van hydrologische modellen. Het zo verkregen inzicht in de ‘vullingsgraad’ van de bodem biedt veel potentie voor het operationele waterbeheer, waaronder peilbeheer. De informatie kan als inhoudelijke basis worden gebruikt om projecten als Slim Watermanagement vorm te geven.
    Consumer interest in social sustainability issues of whitefish from capture fisheries in the northeast Atlantic
    Veldhuizen, L.J.L. ; Lans, I.A. van der; Berentsen, P.B.M. ; Boer, I.J.M. de; Bokkers, E.A.M. - \ 2016
    In: Book of abstracts WIAS Science Day 2016. - - p. 23 - 23.
    Consumers are becoming increasingly interested in product attributes relating to sustainability. Consumers of whitefish mainly demonstrate an interest in environmental sustainability, since they are paying 10%-14% more for whitefish that is labelled as originating from sustainably managed fish stocks. However, studies have shown that consumers generally prefer improved social sustainability over improved environmental sustainability. Therefore, the objective of this study was to investigate consumer interest in social sustainability attributes of whitefish from the northeast Atlantic. The method used is choice modelling, a method to determine preferences for several product attributes based on consumer choices. The selected attributes are worker safety, product quality, fish welfare, local employment and approach to overfishing. Inclusion of the latter environmental sustainability attribute enabled a comparison of preferences for social sustainability in relation to preferences for environmental sustainability. A survey was developed that consisted of five choice sets in which each attribute was compared to one other attribute, and five choice sets in which three attributes were compared to two other attributes. This survey was completed by 457 respondents. The conditional logit model that was fitted to the data showed that people have the strongest preference for an improved approach to overfishing, followed by improved fish welfare, improved product quality, improved worker safety and improved local employment. This result indicates that people prefer environmental sustainability over social sustainability in the context of whitefish from the northeast Atlantic. Furthermore, this result indicates that in this context, people prefer social sustainability attributes relating to animals over social sustainability attributes relating to the product or to other people. However, a mixed logit model that was fitted to the data indicates that there is choice heterogeneity among respondents that cannot be explained from attribute preferences. Therefore, further analyses will focus on exploring explanatory variables such as concern, trust and values.
    Inventarisatie van modellen van Alterra voor beheervragen Rijkswaterstaat : waterkwaliteit en ecologie
    Veldhuizen, A.A. ; Assinck, F.B.T. - \ 2016
    Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2698) - 29
    waterbeheer - waterkwaliteit - modellen - ecologie - water management - water quality - models - ecology
    Rijkswaterstaat wil modellen en modeltoepassingen, die de komende jaren voor het beheer van rijkswateren op het gebied van waterkwaliteit en ecologie nodig geacht worden, onder beheer en onderhoud brengen. Alterra heeft modellen voor waterkwaliteit en ecologie die voor beheervragen van Rijkswaterstaat gebruikt kunnen worden. Dit rapport geeft daar een overzicht van. Het rapport is opgesteld in het kader van het door Deltares in opdracht van Rijkswaterstaat uitgevoerde B&O Waterkwaliteitsmodelschematisaties. De modellen zijn onderverdeeld in modeltypen: Nutriënten procesmodellen, Nutriënten effectmodellen, Procesmodellen bestrijdingsmiddelen, Procesmodellen natuur, Effectmodellen natuur, Graadmeters natuur, Planningstools en Procesmodellen Water. Per modeltype is een factsheet opgesteld waarin globaal wordt aangegeven waarvoor de modellen bedoeld zijn, hoe ze werken, welke vragen ermee beantwoord kunnen worden, wat de belangrijkste output is en wat de mogelijkheden en beperkingen zijn. Tevens is er een lijst met modeltoepassingen opgesteld, waarvoor vragen zijn beantwoord.
    Green Design for urban watermanagement in The Netherlands
    Moors, E.J. ; Hattum, T. van; Veldhuizen, A.A. - \ 2015
    - 31 p.
    A method to assess social sustainability of captures fisheries: an application to a Norwegian trawler
    Veldhuizen, L.J.L. ; Berentsen, P.B.M. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2015
    In: Abstract Book of the 5th World Sustainability Forum, Basel, Switzerland. - - p. 136 - 136.
    A method to assess social sustainability of capture fisheries: An application to a Norwegian trawler
    Veldhuizen, Linda - \ 2015
    A method to assess social sustainability of capture fisheries: An application to a Norwegian trawler
    Veldhuizen, L.J.L. ; Berentsen, P.B.M. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2015
    In: Program and Abstract Book of 5th World Sustainability Forum. - - p. 136 - 136.
    Social sustainability assessment of capture fisheries is, both in terms of method development and measurement, not well developed. The objective of this study, therefore, was to develop a method consisting of indicators and rubrics (i.e. categories that articulate levels of performance) to assess social sustainability of capture fisheries. This method was applied to a Norwegian trawler that targets cod and haddock in the northeast Atlantic. Based on previous research, 13 social sustainability issues were selected. To measure the state of these issues, 17 process and outcome indicators were determined. To interpret indicator values, rubrics were developed for each indicator, using standards set by international conventions or data retrieved from national statistics, industry agreements or scientific publications that explore rubric scales. The indicators and rubrics were subsequently used in a social sustainability assessment of a Norwegian trawler. This assessment indicated that overall, social sustainability of this trawler is relatively high, with high rubric scores, for example, for worker safety, provisions aboard for the crew and companies’ salary levels. The assessment also indicated that the trawler could improve on healthy working environment, product freshness and fish welfare during capture. This application demonstrated that our method provides insight into social sustainability at the level of the vessel and can be used to identify potential room for improvement. This method is also promising for social sustainability assessment of other capture fisheries.
    Waterberging in Het Waterrijk : scenarioberekeningen naar piekberging en voorraadberging als opmaat voor een module voor anticiperend waterbeheer
    Jansen, P.C. ; Massop, H.T.L. ; Veldhuizen, A.A. ; Mulder, M.H. ; Kwakernaak, C. - \ 2015
    Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2667) - 99
    waterbeheer - modellen - waterbeleid - wateropslag - gelderland - water management - models - water policy - water storage - gelderland
    RichWaterWorld is een netwerk van publieke partners, kennisinstellingen en bedrijven dat onderzoek doet naar innovatieve systemen voor gecombineerde waterberging en waterzuivering. Basis hiervoor is een hydrologisch model waarmee de waterhuishouding voor de komende twee weken wordt berekend en preventieve maatregelen worden voorgesteld. Het model wordt getoetst in Het Waterrijk, een gebied voor piekberging en voorraadberging in Park Lingezegen ten zuiden van Arnhem.
    MIPWA 2.2 : vervangen van CAPSIM door MetaSWAP
    Hoogewoud, J.C. ; Veldhuizen, A.A. ; Hunink, J.C. ; Walsum, P.E.V. van - \ 2015
    Deltares - 98
    bodemwater - hydrologie - bodemwaterbeweging - grondwaterstand - modellen - soil water - hydrology - soil water movement - groundwater level - models
    MIPWA 2.1 gebruikt het onverzadigde zone model CAPSIM van Alterra. Dit model wordt niet meer ondersteund. De opvolger is het model MetaSWAP. Dit model geeft een betere conceptuele beschrijving van de onverzadigde zone, een deel van de uitvoer is makkelijk te bekijken in iMOD en geïnterpoleerde meteorologische data van het KNMI is reeds geschikt als invoer. De MIPWA groep heeft Deltares en Alterra gevraagd CAPSIM te vervangen door MetaSWAP. Het bleek dat het schijnspiegel concept in CAPSIM (onverwacht) niet zonder meer overgenomen kon worden in MetaSWAP
    A method to assess social sustainability of capture fisheries: An application to a Norwegian trawler
    Veldhuizen, L.J.L. ; Berentsen, P.B.M. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2015
    Environmental Impact Assessment Review 53 (2015). - ISSN 0195-9255 - p. 31 - 39.
    time-temperature integrators - different quality parameters - production systems - egg-production - swot analysis - indicators - fish - farm - appraisal - rapfish
    Social sustainability assessment of capture fisheries is, both in terms of method development and measurement, not well developed. The objective of this study, therefore, was to develop a method consisting of indicators and rubrics (i.e. categories that articulate levels of performance) to assess social sustainability of capture fisheries. This method was applied to a Norwegian trawler that targets cod and haddock in the northeast Atlantic. Based on previous research, 13 social sustainability issues were selected. To measure the state of these issues, 17 process and outcome indicators were determined. To interpret indicator values, rubrics were developed for each indicator, using standards set by international conventions or data retrieved from national statistics, industry agreements or scientific publications that explore rubric scales. The indicators and rubrics were subsequently used in a social sustainability assessment of a Norwegian trawler. This assessment indicated that overall, social sustainability of this trawler is relatively high, with high rubric scores, for example, for worker safety, provisions aboard for the crew and companies' salary levels. The assessment also indicated that the trawler could improve on healthy working environment, product freshness and fish welfare during capture. This application demonstrated that our method provides insight into social sustainability at the level of the vessel and can be used to identify potential room for improvement. This method is also promising for social sustainability assessment of other capture fisheries.
    Social sustainability of cod and haddock fisheries in the northeast Atlantic: what issues are important?
    Veldhuizen, L.J.L. ; Berentsen, P. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2015
    Journal of Cleaner Production 94 (2015). - ISSN 0959-6526 - p. 76 - 85.
    life-cycle assessment - environmental impacts - production systems - fish - categories - indicators - products - welfare - stress - salmon
    Research on the sustainability of capture fisheries has focused more on environmental and economic sustainability than on social sustainability. To assess social sustainability, first relevant and important social sustainability issues need to be identified. The objective of this study was to identify relevant social sustainability issues for cod and haddock fisheries in the northeast Atlantic and to determine the importance of these issues based on stakeholder input. A heterogeneous group of stakeholders was invited to take part in two consecutive surveys on social sustainability issues. The first survey (n=41) resulted in a long list of 27 relevant social sustainability issues, including six issues that were not identified in previous studies and that address aspects of fish welfare, employees' training and education opportunities, and employees' time off from work. The second survey (n=51) resulted in a ranking of the social sustainability issues in order of importance. The most important issues are worker safety, product freshness and companies' salary levels. In general, social sustainability issues concerning working conditions, employees' job fulfilment and fish welfare are seen as more important than other social sustainability issues. A main discussion point concerns the relation between the importance of a social sustainability issue on the one hand and the type of need that the issue relates to and the state of the issue on the other hand. From the study it can be concluded that the relative importance of social sustainability issues differs per stakeholder group depending on the relation between the stakeholder group and each particular issue. This demonstrates the importance of consulting different stakeholder groups in future studies on social sustainability in order to get a balanced view on the importance of social sustainability issues. Results on the relevance and importance of social sustainability issues for cod and haddock fisheries in the northeast Atlantic enable the fishing industry and policy-makers to direct improvement efforts towards the more important issues. ©
    Social sustainability assessment of a Norwegian trawler using a novel method
    Veldhuizen, L.J.L. ; Berentsen, P. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2015
    Objectives - Develop a method to assess social sustainability of Capture fisheries - Apply this method to a Norwegian trawler Methods - Indicators were defined for working conditions, terms of employment, fish welfare, job satisfaction, and food safety and product quality - Rubrics (i.e. categories describing performance) were determined - Data were collected through questionnaires Conclusions - Our methods provides insight into social sustainability at the level of the vessel and can be used to identify room for improvement Discussion - Validity of Indicators for job satisfaction and professional pride cannot be guaranteed - Some rubrics only apply to capture fisheries or Norway - Rubric assessment is more practical than benchmarking
    De stand van zaken rond het Nationaal Hydrologisch Instrumentarium
    Lange, W. de; Hoogewoud, J. ; Prinsen, G. ; Verkaik, J. ; Veldhuizen, A.A. - \ 2015
    H2O : tijdschrift voor watervoorziening en afvalwaterbehandeling 45 (2015)9. - ISSN 0166-8439 - p. 17 - 19.
    hydrologie - grondwaterstand - kwel - modellen - hydrology - groundwater level - seepage - models
    Het Nationaal Hydrologisch Instrumentarium (NHI), het landsdekkende grond- en oppervlaktewatermodel van Nederland dat wordt ingezet voor zowel landelijke beleidsstudies als operationele toepassingen in droge perioden, is afgelopen jaar aangepast en verbeterd1). Tot eind dit jaar ligt de nadruk daarbij op de landelijke schaal. Daarna moet het NHI uitgroeien naar een systeem dat men ook kan gebruiken voor de onderbouwing van grote besluiten in de regio. In feite moet het NHI het 'condensatiepunt' worden voor de hydrologische kennis in Nederland. Het moet zorg dragen voor een landelijke consistentie bij landelijke en regionale analyses. In het NHI participeren momenteel de waterschappen, de drinkwaterbedrijven en het Rijk. De provincies haken zeer waarschijnlijk binnenkort aan.
    Urban water balance and hydrology models to support sustainable urban planning
    Moors, E.J. ; Grimmond, C.S.B. ; Veldhuizen, A.A. ; Järvi, L. ; Bolt, F.J.E. van der - \ 2015
    In: Understanding Urban Metabolism: A Tool for Urban Planning / Chrysoulakis, N., de Castro, E.A., Moors, E.J., New York : Routledge - ISBN 9780415835114 - p. 106 - 117.
    An operational, multi-scale, multi-model system for consensus-based, integrated water management and policy analysis: The Netherlands Hydrological Instrument
    Lange, W.J. de; Prinsen, G.F. ; Hoogewoud, J.C. ; Veldhuizen, A.A. ; Verkaik, J. ; Essink, G.H.P.O. ; Walsum, P.E.V. van; Delsman, J.R. ; Hunink, J.C. ; Massop, H.T.L. ; Kroon, T. - \ 2014
    Environmental Modelling & Software 59 (2014). - ISSN 1364-8152 - p. 98 - 108.
    distributed modeling system - flow - simulation - interface - europeen - openmi - she
    Water management in the Netherlands applies to a dense network of surface waters for discharge, storage and distribution, serving highly valuable land-use. National and regional water authorities develop long-term plans for sustainable water use and safety under changing climate conditions. The decisions about investments on adaptive measures are based on analysis supported by the Netherlands Hydrological Instrument NHI based on the best available data and state-of-the-art technology and developed through collaboration between national research institutes. The NHI consists of various physical models at appropriate temporal and spatial scales for all parts of the water system. Intelligent connectors provide transfer between different scales and fast computation, by coupling model codes at a deep level in software. A workflow and version management system guarantees consistency in the data, software, computations and results. The NHI is freely available to hydrologists via an open web interface that enables exchange of all data and tools. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/).
    WAAR/niet waar! Wat werd afgelopen maand beweerd? Een slechte economie is ook slecht voor de natuur. Wat zegt de wetenschap? Bezuinigingen helpen in elk geval niet
    Veldhuizen, R. ; Buijs, A.E. - \ 2014
    Volkskrant (2014). - p. 2 - 2.
    Social Sustainability Issues of Cod and Haddock Fisheries in the Northeast Atlantic
    Veldhuizen, L.J.L. ; Berentsen, P.B.M. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2014
    In: Proceedings of the 9th International Conference on Life Cycle Assessment in the Agri-Food Sector. - - p. 1477 - 1481.
    Research on the sustainability of capture fisheries has focused more on environmental and economic sustainability than on social sustainability. To assess social sustainability, relevant and important social sustainability issues (SSIs) need to be identified. The objective of this study was to identify relevant and important SSIs for cod and haddock fisheries in the northeast Atlantic based on two stakeholder surveys. The first survey resulted in the identification of 27 relevant SSIs that were ranked in order of importance in the second survey. Results show that worker safety, product freshness and companies’ salary levels are the most important SSIs. Results on the relevance and importance of SSIs enable the industry and policy-makers to direct improvement efforts towards the more important SSIs.
    D4.3 - BSCI final run impact assessment from all cases
    Boer, I.J.M. de; Bokkers, E.A.M. ; Berentsen, P.B.M. ; Ziegler, F. ; Krewer, C. ; Sund, V. ; Groen, E.A. ; Veldhuizen, L.J.L. ; Olsen, P. - \ 2014
    Wageningen : Animal Sciences Group (EU deliverable (WhiteFish project on automated and differentiated calculation of sustainability for cod and haddock products) ) - 33 p.
    D2.3 - Third version of BCSI
    Boer, I.J.M. de; Bokkers, E.A.M. ; Berentsen, P.B.M. ; Ziegler, F. ; Krewer, C. ; Sund, V. ; Groen, E.A. ; Veldhuizen, L.J.L. ; Olsen, P. - \ 2014
    Wageningen : Animal Sciences Group (EU deliverable (WhiteFish project on automated and differentiated calculation of sustainability for cod and haddock products) ) - 10 p.
    Apoio ao desenvolvimento da irrigação dirigido pelos produtores agrícolas, Guia de Desenvolvimento Participativo de Agricultura Irrigada - Liçöes do Projecto-Piloto de Irrigação de Messica
    Beekman, P.W. ; Veldwisch, G.J.A. ; Veldhuizen, L. van - \ 2014
    Leusden : ETC Foundation - ISBN 9789077347003 - 86 p.
    Improving welfare of cod and haddock by adapting current practices in trawl fishing
    Bokkers, E.A.M. ; Pauw, W.H. ; Veldhuizen, L.J.L. - \ 2014
    In: Proceedings of the 6th International Conference on the Assessment of Animal Welfare at Farm and Group Level (WAFL 2014). - Wageningen, The Netherlands : Wageningen Academic Publishers - ISBN 9789086862474 - p. 207 - 207.
    Fish are sentient beings and therefore animal welfare can be considered an issue in fisheries. Current trawl fishing on cod and haddock leads to exhaustion, injuries and suffocation of the fish, indicators of impaired welfare. Fishermen might be able to implement changes in trawling to improve the welfare of cod and haddock, but they prioritize their economic balance. The aim of this study was to identify improvement options for welfare of cod and haddock during the most welfare impairing phase of catch without economic losses or extra investments to the fishermen. Fish caught in wild capture fisheries have lived a natural life prior to catch. This natural life is interrupted when they are caught and killed by fishermen. In trawl fishing, 5 phases can be distinguished that might affect fish welfare: pretrawl, drifting, towing, surfacing, and landing and processing. Data of a Norwegian trawler was used as a case. Severity of each phase was assessed by studying the contribution to stress and injuries. Also duration of each phase was analysed. In the pretrawl phase (1-12 min), fish swim away from an approaching trawler. During drifting (
    AGRICOM 2.01 : theorie en gebruikershandleiding
    Mulder, H.M. ; Veldhuizen, A.A. - \ 2014
    Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2576) - 61
    bodemwater - grondwaterstand - ecohydrologie - opbrengsten - kosten-batenanalyse - landbouw - waterbeheer - modellen - soil water - groundwater level - ecohydrology - yields - cost benefit analysis - agriculture - water management - models
    AGRICOM is een acronym voor AGRIcultural COst Model. AGRICOM is een agro-economisch model dat op basis van de resultaten van een hydrologisch model kosten en baten voor de landbouwsector in Nederland berekent. Dit betreft de effecten van te droge, te natte of te zoute omstandigheden op de Nederlandse landbouw. De kosten en baten analyse wordt per jaar of over een langjarig gemiddelde periode uitgevoerd. Het AGRICOM model dient ter ondersteuning bij beleidsvragen als: wat zijn kansrijke maatregelen om landbouwschade te voorkomen, wat zijn de neveneffecten voor de landbouw van anti-verdrogingsmaatregelen in natuurgebieden en hoe efficiënt is beregening.
    Social Sustainability Issues of Cod and Haddock Fisheries in the Northeast Atlantic
    Veldhuizen, Linda - \ 2014
    Social sustainability issues of cod and haddock fisheries in the northeast Atlantic
    Veldhuizen, L.J.L. ; Berentsen, P.B.M. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2014
    Towards improved modelling of hydrology and vegetation growth in river basins and delta areas A shared vision of Wageningen UR, Deltares and KWR.
    Reidsma, P. ; Kroes, J. ; Veldhuizen, A. ; Ek, R. van; Louw, P. de; Witte, J.P. ; Bartholomeus, R. - \ 2014
    Wageningen UR, Deltares and KWR
    Social Sustainability Issues of Cod and Haddock Fisheries in the Northeast Atlantic
    Veldhuizen, Linda - \ 2014
    De Groene Belofte (interview met Rouke Bosma)
    Veldhuizen, R. ; Bosma, R. - \ 2014
    New Scientist : ideeën die de wereld veranderen 2 (2014)3. - ISSN 2214-7403 - p. 52 - 57.
    Hoe klimaatrobuust is de gewasfactormethode van het Nationaal Hydrologisch Instrumentarium?
    Walsum, P.E.V. van; Bolt, F.J.E. van der; Veldhuizen, A.A. - \ 2013
    Stromingen : vakblad voor hydrologen 19 (2013)3/4. - ISSN 1382-6069 - p. 127 - 133.
    grondwaterstand - evapotranspiratie - waterbehoefte - gewassen - modellen - groundwater level - evapotranspiration - water requirements - crops - models
    Artikel naar aanleiding van het artikel “Metingen en proceskennis vereist voor nauwkeurige verdampingsberekening in grondwatermodellen”, van Bartholomeus e.a. in Stromingen, vol 19, #2 (2013). De SWAP-methode wordt in bovengenoemd artikel gebruikt als substituut voor werkelijke metingen om illustratieve berekeningen uit te voeren. Dat de getoetste ‘enkelvoudige’ gewasfactormethoden in dat opzicht tekort te schieten komt doordat er 1) in die methoden geen expliciet onderscheid wordt gemaakt tussen de verschillende verdampingstermen, en 2) de gewasfactor een versimpelde voorstelling vormt van (onder andere) de aerodynamische ruwheid; die kan de effecten van variaties in windsnelheid daarom niet volgen.
    Variability in fuel efficiency of a northeast Atlantic demersal trawl fishery
    Groen, E.A. ; Ziegler, F. ; Bokkers, E.A.M. ; Veldhuizen, L.J.L. ; Boer, I.J.M. de; Donnelly, K. ; Sund, V. ; Krewer, C. - \ 2013
    Variability in fuel efficiency of a north east Atlantic demersal trawl fishery (extended abstract)
    Groen, E.A. ; Ziegler, F. ; Bokkers, E.A.M. ; Veldhuizen, L.J.L. ; Boer, I.J.M. de; Donnelly, K. ; Sund, V. ; Krewer, C. - \ 2013
    The purpose of the study was to better understand the variability in fuel efficiency of a Norwegian freeze trawler targeting cod, haddock, saithe and shrimps. Additional goals were to evaluate whether batch is actually a relevant resolution in LCAs and to increase the knowledge about the reasons behind variability. This was done by collecting daily data on fuel use and production for two years. Fishing trips targeting shrimps were shown to be significantly more fuel intensive than those targeting fish such as cod, haddock and saithe. Other actors explaining the difference between fishing trips were distance from port to fishing location, season, weather. Results can be used for internal improvement and as a basis for a simplified tool for environmental assessment.
    Identifying social sustainability issues in cod and haddock fisheries
    Veldhuizen, L.J.L. ; Berentsen, P.B.M. ; Bokkers, E.A.M. ; Boer, I.J.M. de - \ 2013
    Social and economic sustainability in the whitefish industry
    Veldhuizen, Linda - \ 2013
    Social sustainability for cod and haddock fisheries in the northeast Atlantic: what are the issues?
    Veldhuizen, Linda - \ 2013
    Steeds meer weerstand tegen regel gentech-gewassen (interview met L.A.P. Lotz en A. Breukers)
    Veldhuizen, R. ; Lotz, L.A.P. ; Breukers, A. - \ 2013
    De Volkskrant (2013). - p. 22 - 22.
    Organisational drivers of capabilities for multi-stakeholder dialogue and knowledge integration
    Veldhuizen, M. ; Blok, V. ; Dentoni, D. - \ 2013
    Journal on Chain and Network Science 13 (2013)2. - ISSN 1569-1829 - p. 107 - 117.
    Business and policy actors increasingly make use of multi-stakeholder interactions (MSI) as a corporate social responsibility strategy to understand, influence, harmonise and meet stakeholders’ social, environmental and financial expectations and so to create value. While many researchers and practitioners have recently described the role of MSI for sustainable innovation and development, little is known about how organisations can develop a capability to effectively create and maintain a dialogue with stakeholders and learn from them. The paper explores the organisational characteristics driving two key capabilities needed for effective MSI: stakeholder dialogue and knowledge integration. Based on the empirical evidence from four business cases, the research follows an explorative approach building upon stakeholder and organisational learning theories. Findings indicate that the ‘involvement of senior management and employees’, ‘open culture’, ‘vision towards sustainability’ and ‘hierarchical structure’ are key drivers of stakeholder dialogue and knowledge integration capabilities.
    Toetsingsrapportage NHI 3.0
    Hoogewoud, J.C. ; Prinsen, G.F. ; Hunink, J.C. ; Veldhuizen, A.A. ; Bolt, F.J.E. van der; Lange, W.J. de - \ 2013
    [Delft] : Deltares - 124
    grondwater - grondwaterstroming - oppervlaktewater - hydrologische gegevens - modellen - watersystemen - zoet water - delta's - waterbeleid - groundwater - groundwater flow - surface water - hydrological data - models - water systems - fresh water - deltas - water policy
    Het Nationaal Hydrologisch Instrumentarium (NHI) is een geïntegreerd landsdekkend grond- en oppervlaktewatermodel van Nederland. Het doel van het Nationaal Hyrologisch Instrumentarium is om hydrologische ondersteuning te bieden aan beleids- en operationele studies op landelijk (en zoveel mogelijk regionaal) niveau. Deze rapportage beschrijft de toetsing van NHI 3.0. De modelresultaten worden vergeleken met de criteria, die zijn opgesteld door RWS-STOWA en er wordt gekeken naar de toepasbaarheid voor de Deltamodel-Zoetwaterverkenning.
    Buisdrainagekaart 2012 : update landelijke potentiele buisdrainagekaart voor het NHI op basis van landbouwmeitellingen 2010
    Massop, H.T.L. ; Schuiling, C. ; Veldhuizen, A.A. - \ 2013
    Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2381) - 50
    buisdrainage - drainage - monitoring - landbouwtellingen - kaarten - karteringen - hydrologie - tile drainage - drainage - monitoring - agricultural censuses - maps - surveys - hydrology
    Voor hydrologische berekeningen is informatie over buisdrainage veelal een noodzakelijk gegeven. De eerste versie van deze kaart was gebaseerd op veldinventarisaties in een beperkt aantal proefgebiedjes. Deze informatie is met behulp van karteerbare kenmerken vertaald naar een kaart voor geheel Nederland en had een sterk statistisch karakter. Via de landbouwmeitellingen 2010 is landsdekkende informatie over het areaal buisdrainage per landbouwbedrijf beschikbaar gekomen. Door deze gegevens te combineren met het BRP-bestand, informatie over de ruimtelijke ligging van de percelen van de landbouwbedrijven, is het mogelijk om op bedrijfsniveau buisdrainage toe te kennen aan gebruikspercelen. De afgeleide kaart is voor vier gebieden getoetst. In drie gebieden is hiervoor gebruik gemaakt van een gebiedsdekkende inventarisatie en in één gebied van puntwaarnemingen van buisdrainage. De landbouwmeitellingen hebben alleen betrekking op het landbouwgebied, voor de overige gebieden is de kaart aangevuld met informatie uit de TOP10-vector en LGN6 met aanvullende objecten waarvan wordt verwacht dat deze eveneens zijn gedraineerd. De buisdrainagekaart is beschikbaar als dieptekaart en als weerstandskaart
    BOFEK2012, de nieuwe bodemfysische schematisatie van Nederland
    Wosten, J.H.M. ; Vries, F. de; Hoogland, T. ; Massop, H.T.L. ; Veldhuizen, A.A. ; Vroon, H.R.J. ; Wesseling, J.G. ; Heijkers, J. ; Bolman, A. - \ 2013
    Wageningen : Alterra (Alterra-rapport 2387) - 46
    bodemfysica - bodemwaterretentie - bodemtypen - classificatiesystemen - soil physics - soil water retention - soil types - classification systems
    Aan de 315 bodemeenheden behorende bij de bodemkaart van Nederland, schaal 1 : 50.000, zijn waterretentie- en doorlatendheidskarakteristieken uit de Staringreeks toegekend. Met een model zijn voor deze eenheden functionele kenmerken berekend. Op grond van verwantschap in functionele kenmerken zijn de 315 bodemeenheden geclusterd in 72 bodemfysische eenheden en afgebeeld in de nieuwe BOdemFysische EenhedenKaart (BOFEK2012). Om bij modelberekeningen van bodemwatertransport en stoffentransport in de bodem deze gegevens te kunnen gebruiken is een dataset samengesteld met informatie over: - GIS-bestand, met de geografische verbreiding van de BOFEK-eenheden in Nederland. - Profielschetsen met de laagopbouw van het bodemprofiel tot 1.20 m-mv. en de daaraan gerelateerde bodemfysische kenmerken.
    Potentiele beregeningskaart 2012 : update landelijke potentiele beregeningskaart voor het NHI op basis van landbouwmeitellingen 2010
    Massop, H.T.L. ; Schuiling, C. ; Veldhuizen, A.A. - \ 2013
    Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2382) - 40
    landbouwgronden - beregening - oppervlakte (areaal) - zoet water - watervoorziening - nederland - agricultural soils - overhead irrigation - acreage - fresh water - water supply - netherlands
    De zoetwatervraag voor beregening wordt bepaald door gebruik te maken van hydrologische modelberekeningen. Voor deze berekeningen is informatie noodzakelijk over de grootte van het potentieel te beregenen areaal en de ruimtelijke ligging hiervan. Via de landbouwmeitellingen is in het verleden al meerdere malen informatie ingewonnen over beregening in de landbouw. Het areaal dat wordt beregend neemt nog steeds toe. Bij de landbouwmeitellingen 2010 is de meest recente landsdekkende informatie over het areaal beregening per landbouwbedrijf beschikbaar gekomen. Door deze gegevens te combineren met het BRP-percelenbestand, dat informatie over de ruimtelijke ligging van de percelen van de landbouwbedrijven bevat, is het mogelijk om op bedrijfsniveau beregening toe te kennen aan gebruikspercelen. De afgeleide kaart is op gemeenteniveau vergeleken met de voorgaande kaart. De landbouwmeitellingen hebben alleen betrekking op het landbouwgebied, voor ontbrekende gebruiksvormen is de kaart aangevuld met informatie uit de TOP10-vector en LGN6. De vraag over de beregeningsbron was minder volledig beantwoord.
    Schaaldier voelt toch meer pijn (interview met Hans van de Vis)
    Veldhuizen, R. ; Vis, J.W. van de - \ 2013
    De Volkskrant (2013).
    D2.2 Second version of the BSCI / Project: Automated and differentiated calculation of sustainability for cod and haddock products
    Boer, I.J.M. de; Berentsen, P.B.M. ; Bokkers, E.A.M. ; Ziegler, F. ; Veldhuizen, L.J.L. ; Groen, E.A. - \ 2012
    European Commission FP7
    D2.1 First version of the BSCI / Project: Automated and differentiated calculation of sustainability for cod and haddock products
    Boer, I.J.M. de; Bokkers, E.A.M. ; Berentsen, P.B.M. ; Ziegler, F. ; Olsen, P. ; Veldhuizen, L.J.L. ; Groen, E.A. - \ 2012
    European Commission FP7
    Campylobacter jejuni is highly susceptible to killing by chicken host defense peptide cathelicidin-2 and suppresses intestinal cathelicidin-2 expression in young broilers
    Dijk, A. van; Herrebout, M. ; Tersteeg-Zijderveld, M.H.G. ; Tjeerdsma-van Bokhoven, J.L.M. ; Bleumink-Pluym, N. ; Jansman, A.J.M. ; Veldhuizen, E.J.A. ; Haagsman, H.P. - \ 2012
    Veterinary Microbiology 160 (2012)3-4. - ISSN 0378-1135 - p. 347 - 354.
    day-of-hatch - enteric infections - resistance - identification - colonization - pathogenesis - heterophils - mechanism - virulence - ll-37
    Little is known about the interactions of chicken host defense peptides (HDPs) with Campylobacter jejuni in young chicks. To examine the role of the chicken HDP, cathelicidin-2 (CATH-2) in host-pathogen interactions we challenged 4-day-old Ross 308 broilers with a chicken-derived C jejuni isolate (WS356) and used the chicken pathogen Salmonella enterica Enteritidis phage type 4 (FGT1) as a reference. Immunohistochemical staining was used to localize CATH-2, C jejuni and Salmonella enteritidis. Intestinal CATH-2 mRNA expression levels were determined by quantitative PCR. Antibacterial activities of CATH-2 peptide against C. jejuni and S. enteritidis isolates were assessed in colony count assays. In contrast to S. enteritidis, C jejuni was not seen to attach to intestinal epithelium and C jejuni challenge did not result in recruitment of CATH-2 containing heterophils to the small intestinal lamina propria. Minimal inhibitory concentrations found for CATH-2 peptide against human- and chicken-derived C. jejuni isolates were similar (0.6-2.5 mu M) and much lower than for S. enteritidis (20 mu M). Compared to wild-type C. jejuni 81116, the lipooligosaccharide (LOS)-deficient 81116 Delta waaF mutant was much more susceptible to CATH-2. Interestingly, CATH-2 mRNA expression levels in the small intestine were significantly lower 48 h p.i. in C jejuni-challenged chicks. These findings indicate that human clinical and chicken-derived C jejuni are equally highly susceptible to chicken CATH-2 peptide and that C jejuni uses LOS to protect itself to some extent against HDPs. Moreover, suppression of intestinal CATH-2 expression levels may be part of the C. jejuni immune evasion strategy.
    NMDC-Innovatieproject, Van Kritische zone tot Kritische Onzekerheden: case studie Baakse beek
    Ek, R. van; Janssen, G. ; Kuijper, M. ; Veldhuizen, A. van; Wamelink, G.W.W. ; Mol, J. ; Groot, A.M.E. ; Schippers, P. ; Kroes, J. - \ 2012
    delft : Deltares - 185 p.
    Multi-stakeholder interaction as a source for sustainable development: organisational drivers determining firms´ ´stakeholder dialogue´ and ´knowledge integration´ capabilities
    Veldhuizen, M.G. ; Blok, V. ; Dentoni, D. - \ 2012
    Look who’s talking too. Or how to respect conflicts of interest between cross-sectoral partners in communication and negotiation processes
    Blok, V. ; Veldhuizen, M.G. ; Dentoni, D. - \ 2012
    Building Capabilities for Multi-Stakeholder Interactions at Global and Local Levels: An Executive Interview with Jan Kees Vis, Berton Torn and Anniek Mauser
    Dentoni, D. ; Veldhuizen, M.G. - \ 2012
    International Food and Agribusiness Management Review 15 (2012)B. - ISSN 1096-7508 - p. 95 - 106.
    Managers of Unilever discuss the processes that led the company to develop and implement a corporate sustainability strategy working with multiple stakeholders. Major learning points include: 1) interactions with stakeholders are crucial to secure strategic resources in developing countries; 2) developing multi-stakeholder platforms must be rooted in the corporate culture and based on principles of innovation; 3) the overarching sustainability strategy, Sustainable Living Plan, launched in 2010, set broad objectives, while empowering local and regional managers—and even individual employees—to start and scale bottom-up initiatives if they find consensus within the organization. The discussions promise to fuel the debate on how organizations can effectively manage “wicked problems” through multi-stakeholder engagement.
    Koppelingen in het NHI
    Veldhuizen, A.A. ; Mulder, H.M. ; Verkaik, J. - \ 2011
    Alterra : Deltares - ISBN 9789490070007 - 28
    agrohydrologie - hydrologie - grondwaterstand - voorspelling - modellen - agrohydrology - hydrology - groundwater level - prediction - models
    Dit rapport doet verslag van de werkzaamheden van Alterra en Deltares aan de koppelingen binnen het Nederlands Hydrologisch Instrumentarium (NHI) en tussen het NHI en het agrohydrologische effectmodel AGRICOM.
    MetaSWAP_V7_2_0. Rapportage van activiteiten ten behoeve van certificering met Status A
    Walsum, P.E.V. van; Veldhuizen, A.A. - \ 2011
    Wageningen : WUR (WOt-werkdocument 276) - 116
    bodemfysica - transportprocessen - bodemwaterbeweging - hydrologie - oppervlaktewater - waterbalans - plant-water relaties - atmosfeer - simulatiemodellen - soil physics - transport processes - soil water movement - hydrology - surface water - water balance - plant water relations - atmosphere - simulation models
    Veel vragen over het waterbeheer betreffen situaties en processen die worden beïnvloed door hydrologische terugkoppelingen op regionale en zelfs nationale schaal. MetaSWAP is bedoeld voor het vervangen van SWAP bij het grootschalig doorrekenen van bodem-plant-atmosfeerkolommen die gekoppeld zijn aan geïntegreerde gebiedsmodellen van grond- en oppervlaktewater. MetaSWAP is een ‘meta’-model van SWAP. Het metaconcept is gebaseerd op een vereenvoudigde oplossing van de niet-lineaire partiële differentiaalvergelijking om bodemfysische processen te beschrijven, de zogenaamde Richards-vergelijking. Deze vergelijking wordt vervangen door twee ‘gewone’ differentiaalvergelijkingen, één voor de procesbeschrijving, en één voor de waterbalans. Om het informatieverlies dat bij die vereenvoudiging optreedt te compenseren, is het nodig om MetaSWAP te kalibreren en te valideren op SWAP. Dit document beschrijft hoe dat gedaan wordt, en tevens hoe de kwaliteit van het model is geborgd volgens de zogenaamde ‘Status A’ standaard van de WOT Natuur & Milieu.
    Integration of models using shared state variables: Implementation : in the regional hydrologic modelling system SIMGRO
    Walsum, P.E.V. van; Veldhuizen, A.A. - \ 2011
    Journal of Hydrology 409 (2011)1-2. - ISSN 0022-1694 - p. 363 - 370.
    bodemwater - grondwaterstroming - grondwaterstand - hydrologische gegevens - modelleren - nauwkeurigheid - oppervlaktewater - soil water - groundwater flow - groundwater level - hydrological data - modeling - accuracy - surface water - flow - groundwater - zone
    SIMGRO is an integration hub that connects to diverse hydrologic models. Its coupling method aims to describe the hydrologic feedbacks adequately at an acceptable cost of the increased computational load. The achieved balance between accuracy and efficiency is investigated in the paper. The coupling method centres around a shared state variable of two connecting subsystems. A prime example of such a variable is the elevation of the phreatic surface that forms the natural demarcation between the saturated groundwater flow and the unsaturated flow in the soil. In our scheme the shared variable is alternately updated by the connecting submodels, with both models using the same combined storage relationship. This method has also been implemented for the linkage between the ponding water of column models and surface water models. Using a basin-scale model, the scheme was subjected to a time-step sensitivity analysis. Results were compared to a benchmark, for which we took the same scheme, but with a short time step of 0.125 d. Increasing the time step to 1 d caused a numerical error of less than 5% in the simulated regional design discharge. Errors in the simulated 95th percentile of highest groundwater levels are less than 0.05 m. The coupling method presented here is a key element of the Netherlands Hydrological Modelling Instrument. The current version involves half a million spatial units of 250 × 250 m.
    NHI Toetsing, Ontwikkeling en toepassing van methode voor toetsing van NHI 2.1 inclusief vergelijking met NHI 2.0.
    Hoogewoud, J. ; Veldhuizen, A.A. ; Prinsen, G. ; Kuijper, M.J.M. ; Huinink, J. ; Lourens, A. ; Vernimmen, R. - \ 2011
    Delft : Deltares - 156
    hydrologie - grondwater - oppervlaktewater - informatiesystemen - hydrology - groundwater - surface water - information systems
    Dit rapport beschrijft de achtergrond van de methode om NHI2.1 te toetsen aan de criteria die opgesteld zijn door Rijkswaterstaat Waterdienst geldend voor 2010 en bevat de resultaten van die toetsing en de vergelijking met resultaten van NHI2.0. Volgens de criteria is de berekende aan en afvoer van oppervlakte water verbeterd. Op enkele belangrijke meetpunten van de oppervlaktewaterverdeling zijn signifinante verbeteringen te zien.
    NHI 2.1 Veranderingen in NHI
    Hoogewoud, J. ; Veldhuizen, A.A. ; Prinsen, G. ; Delsman, J. ; Hunink, J. ; Verkaik, J. - \ 2011
    Delft : Deltares - 59
    hydrologie - grondwater - oppervlaktewater - informatiesystemen - hydrology - groundwater - surface water - information systems
    Dit document is een concept en uitsluitend bedoeld voor discussiedoeleinden. Een impuls is gegeven aan het verbeteren van het nationaal hydrologisch instrumentarium, NHI 2.0. NHI 2.0 voldeed in 2010 nog niet volledig aan de wensen van RWS. In 2010 hebben twee processen plaatsgevonden, die tot meer inzicht hebben geleid in de prestaties van het NHI. Ten eerste de regionale toetsing van het NHI, onder andere door STOWA, en ten tweede het gebruik van NHI in diverse regionale en landelijke studies voor Zoetwaterverkenning (ZWV). Als gevolg hiervan zijn in NHI 2.1, in opdracht van de RWS Waterdienst, veel verbeteringen doorgevoerd.
    Identification of human gustatory cortex by activation likelihood estimation
    Veldhuizen, M.G. ; Albrecht, J. ; Zelano, C. ; Boesveldt, S. ; Breslin, P. ; Lundstrom, J.N. - \ 2011
    Human Brain Mapping 32 (2011)12. - ISSN 1065-9471 - p. 2256 - 2266.
    caudolateral orbitofrontal cortex - medial prefrontal cortex - anterior temporal-lobe - taste cortical areas - false discovery rate - human brain - rhesus-monkey - intensity perception - macaque monkeys - ale metaanalysis
    Over the last two decades, neuroimaging methods have identified a variety of taste-responsive brain regions. Their precise location, however, remains in dispute. For example, taste stimulation activates areas throughout the insula and overlying operculum, but identification of subregions has been inconsistent. Furthermore, literature reviews and summaries of gustatory brain activations tend to reiterate rather than resolve this ambiguity. Here, we used a new meta-analytic method [activation likelihood estimation (ALE)] to obtain a probability map of the location of gustatory brain activation across 15 studies. The map of activation likelihood values can also serve as a source of independent coordinates for future region-of-interest analyses. We observed significant cortical activation probabilities in: bilateral anterior insula and overlying frontal operculum, bilateral mid dorsal insula and overlying Rolandic operculum, and bilateral posterior insula/parietal operculum/postcentral gyrus, left lateral orbitofrontal cortex (OFC), right medial OFC, pregenual anterior cingulate cortex (prACC) and right mediodorsal thalamus. This analysis confirms the involvement of multiple cortical areas within insula and overlying operculum in gustatory processing and provides a functional "taste map" which can be used as an inclusive mask in the data analyses of future studies. In light of this new analysis, we discuss human central processing of gustatory stimuli and identify topics where increased research effort is warranted
    KKF-Model Platform Coupling : summary report KKF01b
    Schellekens, J. ; Veldhuizen, A.A. ; Manders, A.M.M. ; Winsemius, H.C.M. ; Verseveld, W.J. ; Linde, A.H. te; Ulft, L.H. van; Meijgaard, E. van; Schaap, M. ; Barendregt, A. ; Schot, P.P. ; Wassen, M.J. ; Ward, P.J. ; Veldkamp, T.I.E. ; Mulder, H.M. ; Verkaik, J. - \ 2010
    Utrecht : Knowledge for Climate Programme Office - ISBN 9789490070007 - 48
    klimaatverandering - hydrologie van stroomgebieden - modellen - climatic change - catchment hydrology - models
    Nederland bereidt zich voor op een sneller stijgende zeespiegel en een veranderend klimaat. Hiervoor is het Deltaprogramma gestart. Dit deltaprogramma voorziet een serie beslissingen die grote gevolgen zullen hebben voor het beheer van het water in Nederland. Om deze beslissingen zorgvuldig te nemen is informatie nodig over hoe het klimaat en de stijgende zeespiegel dit waterbeheer zullen beïnvloeden. De modellen die de gevolgen van klimaatverandering berekenen zullen daarom met dezelfde klimaat forcering en gekoppeld aan elkaar moeten worden gebruikt. In dit onderzoek is gekeken naar het linken van hydrologische en hydrodynamische modellen – en daaraan gekoppelde modellen die de ontwikkelingen in natuur en landgebruik modelleren -- die het gebied van de Alpen tot en met de Noordzee inclusief Nederland beschrijven.
    Development of an operational drought forecasting system using couples models for groundwater, surface water and unsaturated zone
    Berendrecht, W. ; Weerts, A.H. ; Veldhuizen, A.A. ; Kroon, T. - \ 2010
    In: Proceedings of ModelCare 2009 - 7th International Conference on Calibration and Reliability in Groundwater Modeling on Managing Groundwater and the Environment, Wuhan, China, 20-23 September 2009. - Wuhan, China : IAHS - p. 6 - 6.
    During periods of drought the National Coordinating Committee for Water Distribution of the Netherlands has to decide how the available surface water is used and allocated between different functions. To support decision making, real-time information is needed about the availability of surface water, groundwater levels, saturation of the root zone, etc. This real-time information must give insight into the current state of the system as well as into its state in the near future. For this purpose an operational drought forecasting system has been implemented. This system runs on a daily basis and provides distributed model estimates and forecasts of hydrological variables for the whole of the Netherlands. The model consists of a nationwide distribution model and surface water model coupled with a MODFLOW-MetaSWAP model of the saturated-unsaturated zone (250x250 m2). Model forcing includes radar data of actual precipitation and point measurements of actual evaporation. Model forecasts are driven by precipitation and evaporation from the Ensemble Prediction System. Each day 50 model runs are performed in parallel to calculate 10-day forecasts based on the ensemble members of the EPS. The system is operationalized within Delft-FEWS, which is an operational forecasting system to manage data and models in a real-time environment.
    Nationaal Hydrologisch Instrumentarium (NHI)
    Veldhuizen, Ab - \ 2010
    De Bosatlas van Nederland Waterland
    Bolt, F.J.E. van der; Bonten, L.T.C. ; Gaast, J.W.J. van der; Massop, H.T.L. ; Mulder, H.M. ; Onderstal, J. ; Veldhuizen, A.A. ; Vries, F. de - \ 2010
    Groningen : Noordhoff Uitgevers - ISBN 9789001902032 - 104
    polders - rivieren - ontginning - landschap - waterbeheer - bodem - verdroging - verzilting - stedelijke gebieden - klimaatverandering - kaarten - nederland - waterwinning - waterzuivering - rivers - reclamation - landscape - water management - soil - desiccation - salinization - urban areas - climatic change - maps - netherlands - water catchment - water treatment
    De Bosatlas van Nederland Waterland is een ‘vlootschouw’ van alles wat Nederland maakt tot een waterland. De atlas gaat met honderden kaarten, tientallen grafieken en vele luchtfoto’s in op onderwerpen als de geschiedenis van het waterbeheer in Nederland, culturele aspecten zoals de waterlinies, de economische aspecten van onder andere scheepvaart en visserij, klimaatverandering en veiligheid, het Nederlandse waterbeheer, gezondheid en milieu, water in het landschap en water in de stad. In totaal hebben meer dan 40 overheden, kennisinstellingen en bedrijven aan de Wateratlas meegewerkt.
    Definitiestudie Agricom
    Bakel, P.J.T. van; Linderhof, V.G.M. ; Klooster, C.E. van 't; Veldhuizen, A.A. ; Goense, D. ; Mulder, H.M. ; Massop, H.T.L. - \ 2009
    Wageningen : Alterra (Alterra-rapport 1934) - 56
    landbouw - waterbeheer - watervoorziening - watergebruik - zoet water - hydrologie - modellen - nederland - integraal waterbeheer - modelleren - economische aspecten - agrohydrologie - agriculture - water management - water supply - water use - fresh water - hydrology - models - netherlands - integrated water management - modeling - economic aspects - agrohydrology
    Agricom is een model om de effecten van te droge, te natte of te zoute omstandigheden op de Nederlandse landbouw te bepalen. Dit rapport geeft aan op welke punten Agricom verbetert kan en moet worden. Het gaat hierbij om zowel hydrologische als economische aspecten in de berekeningen. Als de aanpassingen zijn doorgevoerd, kan Agricom goed worden ingezet om de effecten van zoetwatervoorziening in Nederland voor de landbouw te bepalen.
    Chicken heterophils are recruited to the site of Salmonella infection and release antibacterial mature Cathelicidin-2 upon stimulation with LPS
    Dijk, A. van; Tersteeg-Zuiderveld, M.H.G. ; Tjeerdsma-van Bokhoven, J.L.M. ; Jansman, A.J.M. ; Veldhuizen, E.J. ; Haagsman, H.P. - \ 2009
    Molecular Immunology 46 (2009)7. - ISSN 0161-5890 - p. 1517 - 1526.
    antimicrobial peptides - polymorphonuclear leukocytes - neutrophil maturation - microbicidal activity - increasing protein - avian heterophils - gene-expression - innate immunity - granules - inflammation
    The biological functions of avian cathelicidins are poorly defined. In mammals, cathelicidins have shown to possess potent broad-range antimicrobial activity as well as immunomodulatory activities. Therefore, we investigated the microbicidal activities and localization of Cathelicidin-2 in non-infected and Salmonella-challenged broiler chickens. Using immunohistochemistry, Cathelicidin-2 was shown to be abundantly present in heterophils, localized in the large rod-shaped granules, but absent in other peripheral blood cells and intestinal epithelial cells. Cathelicidin-2 synthesis was observed to be initiated at the early promyelocyte stage. Considerable infiltration of Cathelicidin-2 containing heterophils was observed in the jejunum of Salmonella enteritidis-challenged broilers within 8 h post-infection. Heterophils were shown to release mature Cathelicidin-2 peptide upon stimulation with Salmonella-derived LPS in a time-dependent way. Processing of the Cathelicidin-2 precursor was mediated by serine proteases with a divalent cation dependency. Cathelicidin-2 peptide showed potent bactericidal and fungicidal activity against all tested microorganisms, including chicken-specific Salmonella isolates. These results underscore the importance of avian heterophils as a first line of defence against invading pathogens and implicate that via heterophil-mediated release, cathelicidins may greatly contribute to avian innate immunity
    Conceptualisatie en parameterisatie van landgebruik, bodem, beregening en buisdrainage in het NHI
    Veldhuizen, A.A. ; Bakel, P.J.T. van; Kroon, T. ; Vries, F. de; Massop, H.T.L. - \ 2008
    Stromingen : vakblad voor hydrologen 14 (2008)4. - ISSN 1382-6069 - p. 47 - 62.
    veldgewassen - ondergrondse drainage - bodemtypen - modellen - agrohydrologie - field crops - subsurface drainage - soil types - models - agrohydrology
    Bij de modellering van de hydrologie van de bodem en het landgebruik in het NHI (Nationaal Hydrologisch Instrumentarium) is voortgebouwd op de hydrologie voor STONE 2.3. Bij STONE is Nederland landsdekkend gemodelleerd met behulp van een beperkt aantal (6405) plots. Een plot is een unieke combinatie van gewastypen, en geclassificeerde hydrologische eigenschappen en bodemchemische eigenschappen. Bij het bouwen van het NHI is deze piotbenadering verlaten. Dit betekent dat voor elke gridcel van 250 bij 250 m een model moet worden gebouwd van het gewas-onverzadigde zone deelsysteem.Daarbij is gebruik gemaakt van de modelcode metaSWAP, de onverzadigde zone module van SIMGRO. In dit artikel wordt zowel de conceptualisatie als de bijbehorende parametrisatie en de daarvoor gebruikte bestanden in meer detail beschreven
    Bepaling van freatische lekweerstanden in het NHI fase 1+
    Vergroesen, T. ; Lange, W.J. de; Veldhuizen, A.A. ; Bakel, P.J.T. van; Pastoors, M.J.H. - \ 2008
    Stromingen : vakblad voor hydrologen 14 (2008)4. - ISSN 1382-6069 - p. 37 - 46.
    bodemwater - drainage - kwel - modellen - geografische informatiesystemen - soil water - drainage - seepage - models - geographical information systems
    Dit artikel beschrijft een methode om op basis van GIS-bestanden de drainage relaties tussen het grondwater en de aanwezige oppervlaktewaterstelsels te berekenen voor vierkante elementen (bijvoorbeeld MODFLOW cellen). In de hier beschreven methode worden lijnvormige drainage stelsels omgezet naar representatieve parameters per vierkant.
    Feasibility of coupling the full Richards solution model SWAP and MODFLOW on a national scale
    Veldhuizen, A.A. ; Pastoors, R. - \ 2008
    In: Modflow and More : Ground Water and Public Policy, Colorado, USA, 19 - 21 May, 2008. - - p. 37 - 41.
    Netherlands Hydrological Modeling Instrument
    Delsman, J. ; Veldhuizen, A.A. ; Snepvangers, J. - \ 2008
    In: Modflow and More. Ground Water and Public Policy, Colorado, U.S.A., 18 - 21 May, 2008. - - p. 355 - 358.
    SIMGRO6: we maken de balans op; Deel 2; Stromingen 14-3
    Walsum, P.E.V. van; Veldhuizen, A.A. ; Heijkers, W.J.M. - \ 2008
    Stromingen : vakblad voor hydrologen 14 (2008)4. - ISSN 1382-6069 - p. 47 - 60.
    hydrologie - plant-water relaties - bodemwater - drainage - modellen - agrohydrologie - hydrology - plant water relations - soil water - drainage - models - agrohydrology
    In dit tweede deel staan deelmodellen centraal, met toepassingen voor drainagesimulatie met snelle terugkoppeling vanuit het oppervlaktewater
    SIMGRO6: we maken de balans op; Deel 1 Stromingen 14-3
    Walsum, P.E.V. van; Veldhuizen, A.A. ; Heijkers, W.J.M. - \ 2008
    Stromingen : vakblad voor hydrologen 14 (2008)4. - ISSN 1382-6069 - p. 37 - 45.
    hydrologie - plant-water relaties - bodemwater - modellen - agrohydrologie - hydrology - plant water relations - soil water - models - agrohydrology
    In dit artikel willen we de lezer deelgenoot maken van de ontwikkelingen die SIMGRO de afgelopen jaren heeft doorgemaakt en schetsenwe via die weg hopelijk het unieke karakter van een van Nederlands oudste, en tevens meest geavanceerde hydrologische modelinstrumentaria. In dit eerste deel van een tweeluik geven we een overzicht van SIMGRO6 als modulair systeem.
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