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/).
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