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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The social construction and consequences of groundwater modelling : insight from the Mancha Oriental aquifer, Spain
Sanz, David ; Vos, Jeroen ; Rambags, Femke ; Hoogesteger, Jaime ; Cassiraga, Eduardo ; Gómez-Alday, Juan José - \ 2018
International Journal of Water Resources Development (2018). - ISSN 0790-0627
Groundwater governance - model-based policy-making - modelling - Social Construction of Technology (SCOT) - Spain

Groundwater flow models have been increasingly used to support policy making. A substantial amount of research has been dedicated to improving, validating and calibrating models and including stakeholders in the modelling process. However, little research has been done to analyze how the choices of model makers and steering by policy makers result in models with specific characteristics, which only allow specific modelling outcomes, and how the use of these modelling outcomes leads to specific social, economic and environmental consequences. In this study, we use the social construction of technology framework to explore the development, characteristics and uses of the groundwater model of the Mancha Oriental aquifer in Spain. The specific characteristics and functioning of this model influenced the policy implementation, implying that involving stakeholders in the development and use of models is crucial for improved democratic policy making.

Long-term impact of rainfed agricultural land abandonment on soil erosion in the Western Mediterranean basin
Cerdà, Artemi ; Rodrigo-Comino, Jesús ; Novara, Agata ; Brevik, Eric Charles ; Vaezi, Ali Reza ; Pulido, Manuel ; Giménez-Morera, Antonio ; Keesstra, Saskia Deborah - \ 2018
Progress in Physical Geography 42 (2018)2. - ISSN 0309-1333 - p. 202 - 219.
Land use change - plots - rainfall - runoff - scale - sediment - Spain
Land abandonment is widespread in the Mediterranean mountains. The impact of agricultural abandonment results in a shift in ecosystem evolution due to changes in soil erosion, but little is known about long-term soil and water losses. This paper uses 11 years of measurements in two paired plots (abandoned vs control) with four subplots to determine how soil and water losses evolved after abandonment within an agricultural parcel. For two years (2004–2005) both plots were under tillage, and after 2006 one plot was abandoned. The monitored plots measured runoff and sediment concentration after each rainfall event. The results show that during the two years after abandonment there was an increase in sediment yield followed by a decrease. Once the field was abandoned, a sudden increase in runoff (× 2.1 times) and sediment concentration (× 1.2 times) was found due to the lack of vegetation and tillage. After one year, the sediment concentration and, after two years, the runoff rates were lower in the abandoned than in the tilled plots. This short transition period ended in contrasting responses between the control and abandoned plot as the impact of abandonment resulted in 21 times less sediment yield after nine years of abandonment. This occurred despite the fact that the year after the abandonment the abandoned plot had 2.9 times more erosion due to low vegetation recovery and the development of a soil crust. Agriculture land abandonment resulted in lower erosion rates over the long term, but showed an increase in soil and water losses over the short term (two years). Therefore, in the first two years after abandonment there is a particular need to apply nature-based soil and water conservation strategies to prevent soil erosion.
Assessing the variability in transmission of bovine tuberculosis within Spanish cattle herds
Ciaravino, G. ; García-Saenz, A. ; Cabras, S. ; Allepuz, A. ; Casal, J. ; García-Bocanegra, I. ; Koeijer, A. De; Gubbins, S. ; Sáez, J.L. ; Cano-Terriza, D. ; Napp, S. - \ 2018
Epidemics 23 (2018). - ISSN 1755-4365 - p. 110 - 120.
Bovine tuberculosis - Disease modelling - Spain - Within-herd transmission parameters
In Spain, despite years of efforts to eradicate bovine tuberculosis (bTB), the disease is still endemic, with some areas of high prevalence. In this context, the surveillance and control plans may need to be re-evaluated, and understanding the dynamics of bTB spread within Spanish herds may help to develop new strategies for reducing the time for detection of infected herds and for the elimination of bTB from the herds already infected. Here, we developed a compartmental stochastic model to simulate bTB within-herd transmission, fed it with epidemiological data from 22 herds (obtained from a previous work) and carried out parameter inference using Approximate Bayesian Computing methods We also estimated the "Within-herd transmission potential Number" (R h ), i.e. the average number of secondary cases generated by a single animal infected introduced into a totally susceptible herd, considering different scenarios depending on the frequency of controls. The median global values obtained for the transmission parameters were: for the transmission coefficient (β), 0.014 newly infected animals per infectious individual per day (i.e. 5.2 per year), for the rate at which infected individuals become infectious (α), 0.01 per day (equivalent to a latent period of 97 days), and for the rate at which infected individuals become reactive to the skin test (α 1 ), 0.08 per day (equivalent to a period of 12 days for an infected animal to become reactive). However, the results also evidenced a great variability in the estimates of those parameters (in particular β and α) among the 22 herds. Considering a 6-month interval between tests, the mean R h was 0.23, increasing to 0.82 with an interval of 1 year, and to 2.01 and 3.47 with testing intervals of 2 and 4 years, respectively.
CASA-SCAR national meeting Spain, 10-11 May 2017, Madrid
Bunthof, Christine - \ 2017
SCAR - Spain - Bioeconomy - policy
National SCAR meetings are a means to increase visibility of SCAR, to promote SCAR outcomes and to provide a forum for exchange between stakeholders at the national and EU level on bioeconomy issues. A first national SCAR event was co-organised with the National Institute for Agricultural and Food Research and Technology (INIA) in Madrid, Spain, on 10 and 11 May 2017.
Transformations accompanying a shift from surface to drip irrigation in the Cànyoles Watershed, Valencia, Spain
Sese-Minguez, Saioa ; Boesveld, Harm ; Asins-Velis, Sabina ; Kooij, Saskia van der; Maroulis, Jerry - \ 2017
Water Alternatives 10 (2017)1. - ISSN 1965-0175 - p. 81 - 99.
Agricultural land use/expansion - Cultural heritage loss - Cànyoles watershed - Drip irrigation - Energy consumption - Spain - Water saving

Drip irrigation is widely promoted in Spain to increase agricultural production and to save water. In the Cànyoles watershed, Valencia, we analysed the consequences of change from surface irrigation to drip irrigation over the past 25 years. There were a number of transformations resulting from, or accelerated by, this change including the 1) intensification of well construction causing a redistribution in access to groundwater, water shortages and a lowering of the groundwater table; 2) expansion of irrigation into former rain-dependent uphill areas resulting in increased water use; 3) shift to higher- value monoculture fruit crops, but with associated higher crop water requirements; 4) increased electrical energy consumption and higher costs due to groundwater pumping; and 5) loss of cultural heritage as wells have replaced traditional surface irrigation infrastructure that originated in the Middle Ages. Consequently, the authors argue that transitioning from surface irrigation to drip irrigation should critically look beyond the obvious short-term benefits that are intended by the introduction of the technology, and consider possible unforeseen side effects, that may have serious long-term impacts on the environment and the community.

A network theory approach for a better understanding of overland flow connectivity
Masselink, Rens J.H. ; Heckmann, Tobias ; Temme, Arnaud J.A.M. ; Anders, Niels S. ; Gooren, Harm P.A. ; Keesstra, Saskia D. - \ 2017
Hydrological Processes 31 (2017)1. - ISSN 0885-6087 - p. 207 - 220.
Connectivity - Graph theory - Networks - Overland flow - Spain

Hydrological connectivity describes the physical coupling (linkages) of different elements within a landscape regarding (sub-) surface flows. A firm understanding of hydrological connectivity is important for catchment management applications, for example, habitat and species protection, and for flood resistance and resilience improvement. Thinking about (geomorphological) systems as networks can lead to new insights, which has also been recognized within the scientific community, seeing the recent increase in the use of network (graph) theory within the geosciences. Network theory supports the analysis and understanding of complex systems by providing data structures for modelling objects and their linkages, and a versatile toolbox to quantitatively appraise network structure and properties. The objective of this study was to characterize and quantify overland flow connectivity dynamics on hillslopes in a humid sub-Mediterranean environment by using a combination of high-resolution digital-terrain models, overland flow sensors and a network approach. Results showed that there are significant differences between overland flow connectivity on agricultural areas and semi-natural shrubs areas. Significant positive correlations between connectivity and precipitation characteristics were found. Significant negative correlations between connectivity and soil moisture were found, most likely because of soil water repellency and/or soil surface crusting. The combination of structural networks and dynamic networks for determining potential connectivity and actual connectivity proved a powerful tool for analysing overland flow connectivity.

Diverging realities: how framing, values and water management are interwoven in the Albufera de Valencia wetland in Spain
Hulshof, Mieke ; Vos, Jeroen - \ 2016
Water International 41 (2016)1. - ISSN 0250-8060 - p. 107 - 124.
Albufera de Valencia - framing - hydrosocial territory - Spain - values - water management - wetland
The Albufera de Valencia is a coastal wetland in south-eastern Spain that has suffered from low water quality since the 1970s. This article explores two divergent framings or imaginaries of the Albufera as a hydrosocial territory. The first, the agro-economic waterscape framing, focuses on the economic and cultural importance of rice production. The second, the idyllic waterscape framing, emphasizes environmental values. The agro-economic waterscape frame is dominant in current water management. Stakeholders deploy highly diverging realities, and the political playing field is not level. Recognition and empowerment are the first steps towards more sustainable water management in the Albufera.
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