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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Groundwater flow and heat transport for systems undergoing freeze-thaw : Intercomparison of numerical simulators for 2D test cases
Grenier, Christophe ; Anbergen, Hauke ; Bense, Victor ; Chanzy, Quentin ; Coon, Ethan ; Collier, Nathaniel ; Costard, François ; Ferry, Michel ; Frampton, Andrew ; Frederick, Jennifer ; Gonçalvès, Julio ; Holmén, Johann ; Jost, Anne ; Kokh, Samuel ; Kurylyk, Barret ; McKenzie, Jeffrey ; Molson, John ; Mouche, Emmanuel ; Orgogozo, Laurent ; Pannetier, Romain ; Rivière, Agnès ; Roux, Nicolas ; Rühaak, Wolfram ; Scheidegger, Johanna ; Selroos, Jan Olof ; Therrien, René ; Vidstrand, Patrik ; Voss, Clifford - \ 2018
Advances in Water Resources 114 (2018). - ISSN 0309-1708 - p. 196 - 218.
Code benchmarking - Numerical simulation - Permafrost - Sharp interface problems - Thermo-hydrological coupling
In high-elevation, boreal and arctic regions, hydrological processes and associated water bodies can be strongly influenced by the distribution of permafrost. Recent field and modeling studies indicate that a fully-coupled multidimensional thermo-hydraulic approach is required to accurately model the evolution of these permafrost-impacted landscapes and groundwater systems. However, the relatively new and complex numerical codes being developed for coupled non-linear freeze-thaw systems require verification. This issue is addressed by means of an intercomparison of thirteen numerical codes for two-dimensional test cases with several performance metrics (PMs). These codes comprise a wide range of numerical approaches, spatial and temporal discretization strategies, and computational efficiencies. Results suggest that the codes provide robust results for the test cases considered and that minor discrepancies are explained by computational precision. However, larger discrepancies are observed for some PMs resulting from differences in the governing equations, discretization issues, or in the freezing curve used by some codes.
HyMeX, a 10-year multidisciplinary program on the Mediterranean water cycle
Drobinski, P. ; Ducrocq, V.P. ; Alpert, P. ; Anagnostou, A. ; Béranger, K. ; Borga, M. ; Braud, I. ; Chanzy, A. ; Davolio, S. ; Delrieu, G. ; Estournel, C. ; Filali Boubrahmi, N. ; Uijlenhoet, R. ; Font, J. ; Grubisic, V. ; Gualdi, S. ; Homar, V. ; Ivancan-Picek, B. ; Kottmeier, C. ; Kotroni, V. ; Lagouvardos, K. ; Lionello, P. ; Llasat, M.C. ; Ludwig, W. ; Lutoff, C. ; Mariotti, A. ; Richard, E. ; Romero, R. ; Rotunno, R. ; Roussot, O. ; Ruin, I. ; Somot, S. ; Taupier-Letage, L. ; Tintore, J. ; Wernli, H. - \ 2014
Bulletin of the American Meteorological Society 95 (2014)7. - ISSN 0003-0007 - p. 1063 - 1082.
regional climate model - flash-flood - synoptic climatology - deep convection - september 2002 - north-western - precipitation - events - sea - database
The Mediterranean countries are experiencing important challenges related to the water cycle, including water shortages and floods, extreme winds, and ice/snow storms, that impact critically the socioeconomic vitality in the area (causing damage to property, threatening lives, affecting the energy and transportation sectors, etc.). There are gaps in our understanding of the Mediterranean water cycle and its dynamics that include the variability of the Mediterranean Sea water budget and its feedback on the variability of the continental precipitation through air–sea interactions, the impact of precipitation variability on aquifer recharge, river discharge, and soil water content and vegetation characteristics specific to the Mediterranean basin and the mechanisms that control the location and intensity of heavy precipitating systems that often produce floods. The Hydrological Cycle in Mediterranean Experiment (HyMeX) program is a 10-yr concerted experimental effort at the international level that aims to advance the scientific knowledge of the water cycle variability in all compartments (land, sea, and atmosphere) and at various time and spatial scales. It also aims to improve the processes-based models needed for forecasting hydrometeorological extremes and the models of the regional climate system for predicting regional climate variability and evolution. Finally, it aims to assess the social and economic vulnerability to hydrometeorological natural hazards in the Mediterranean and the adaptation capacity of the territories and populations therein to provide support to policy makers to cope with water-related problems under the influence of climate change, by linking scientific outcomes with related policy requirements.
SVAT modeling over the Alpilles-ReSeDA experiment: comparing SVAT models over wheat fields
Olioso, A. ; Braud, I. ; Chanzy, A. ; Courault, D. ; Demarty, J. ; Kergoat, L. ; Lewan, E. ; Ottle, C. ; Prevot, L. ; Zhao, W.G.G. ; Calvet, J.C. ; Cayrol, P. ; Jongschaap, R.E.E. ; Moulin, S. ; Noilhan, J. ; Wigneron, J.P. - \ 2002
Agronomie 22 (2002)6. - ISSN 0249-5627 - p. 651 - 668.
soil-water - surface-temperature - land - evaporation - vegetation - parameterization - prediction - moisture - equation - zone
Remote sensing is an interesting tool for monitoring crop production, energy exchanges and mass exchanges between the soil, the biosphere and the atmosphere. The aim of the Alpilles-ReSeDA program was the development of such techniques combining remote sensing data, and soil and vegetation process models. This article focuses on SVAT models (Soil-Vegetation-Atmosphere Transfer models) which may be used for monitoring energy and mass exchanges by using assimilation of remote sensing data procedures. As a first step, we decided to implement a model comparison experiment with the aim of analyzing the relationships between the models' complexity, validity and potential for assimilating remote sensing data. This experiment involved the definition of three comparison scenarios with different objectives: (i) test the models' capacity to accurately describe processes using input parameters as measured in the field; (ii) test the portability of the models by using a priori information on input parameters (such as pedotransfer functions), and (iii) test the robustness of the models by a calibration/validation procedure. These 3 scenarios took advantage of the experimental network that was implemented during the Alpilles experiment and which combined measurements on different fields that may be used for calibration of models and their validations on independent data sets. The results showed that the models' performances were close whatever their complexity. The simpler models were less sensitive to the specification of input parameters. Significant improvements in the models' results were achieved when calibrating the models in comparison with the first scenario
Monitoring energy and mass transfers during the Alpilles-ReSEDA experiment
Olioso, A. ; Braud, I. ; Chanzy, A. ; Autret, H. ; Bethenot, O. ; Bonnefonds, J.M. ; Calvet, J.C. ; Courault, D. ; Demarty, J. ; Ducros, Y. ; Gaudu, J.C. ; Gonzales-Sosa, E. ; Gouget, R. ; Jongschaap, R.E.E. ; Kerr, Y.H. ; Lagouarde, J.P. ; Laurent, J.P. ; Lewan, E. ; Marloie, O. ; Mc Anneney, J. ; Moulin, S. ; Ottlé, C. ; Prévot, L. ; Thony, J.L. ; Wigneron, J.P. ; Zhao, W. - \ 2002
Agronomie 22 (2002)6. - ISSN 0249-5627 - p. 597 - 611.
soil hydraulic-properties - insitu measurement - moisture - evapotranspiration - assimilation - parameters - region - probe - model
The Alpilles-ReSeDA program was initiated to develop and test methods for interpreting remote sensing data that could lead to a better evaluation of soil and vegetation processes. This article presents the experiment that was setup in order to acquire the necessary data to achieve this goal. Intensive measurements were performed for almost one year over a small agricultural region in the South of France (20 kilometers square). To capture the main processes controlling land-atmosphere exchanges, the local climate was fully characterized, and surface energy fluxes, vegetation biomass, vegetation structure, soil moisture profiles, surface soil moisture, surface temperature and soil temperature were monitored. Additional plant physiological measurements and a full characterization of physical soil parameters were also carried out. After presenting the different types of measurements, examples are given in order to illustrate the variability of soils and plant processes in the area in response to the experienced climate
Airborne microwave radiometty on a semi-arid area during HAPEX-Sahel.
Chanzy, A. ; Schmugge, T.J. ; Calvet, J.C. ; Kerr, Y. ; Oevelen, P. van; Grosjean, O. ; Wang, J.R. - \ 1997
Journal of Hydrology 188-189 (1997). - ISSN 0022-1694 - p. 285 - 309.
Soil measurements during HAPEX-Sahel intensive observation period.
Cuenca, R.H. ; Brouwer, J. ; Chanzy, A. ; Droogers, P. ; Galle, S. ; Gaze, S.R. ; Sicot, M. ; Stricker, J.N.M. ; Angulo-Jaramillo, R. ; Boyle, S.A. ; Bromley, J. ; Chebhouni, A.G. - \ 1997
Journal of Hydrology 188/189 (1997). - ISSN 0022-1694 - p. 224 - 266.
bodemwatergehalte - neerslag - hydrologie - sahel - soil water content - precipitation - hydrology
This article describes measurements made at each site and for each vegetation cover as part of the soils program for the HAPEX-Sahel regional scale experiment. The measurements were based on an initial sampling scheme and included profile soil water content, surface soil water content, soil water potential, infiltration rates, additional measurements on core samples, and grain size analysis. The measurements were used to categorize the state of the surface and profile soil water regimes during the experiment and to derive functional relationships for the soil water characteristic curve, unsaturated hydraulic conductivity function, and infiltration function. Sample results for different supersites and different vegetation covers are presented showing soil water profiles and total soil water storage on days corresponding to the experimental 'Golden Days'. Sample results are also presented for spatial and temporal distribution of surface moisture content and infiltration tests. The results demonstrate that the major experimental objective of monitoring the supersites during the most rapid vegetative growth stage with the largest change of the surface energy balance following the rainy season was very nearly achieved. Separation of the effects of probable root activity and drainage of the soil profile is possible. The potential for localized advection between the bare soil and vegetation strips of the tiger bush sites is demonstrated.
Single crystals of V Amylose complexed with glycerol
Hulleman, S.H.D. ; Helbert, W. ; Chanzy, H. - \ 1996
International Journal of Biological Macromolecules 18 (1996)1-2. - ISSN 0141-8130 - p. 115 - 122.
Lamellar single crystals of amylose V glycerol were grown at 100°C by evaporating water from solutions of amylose in aqueous glycerol. The crystals which were square, with lateral dimensions of several micrometers, gave sharp electron diffraction patterns presenting an orthorhombic symmetry with a probable space group P212121 and unit cell parameters: a = 1.93 ± 0.01 nm, b = 1.86 ± 0.01 nm and c (fiber axis) = 0.83 ± 0.03 nm. The amylose V(glycerol) crystal structure which is isomorphous to that of V(DMSO) consists of an antiparallel pair of left-handed six-fold amylose helices centered on the two-fold screw axes of the cell and probably separated by glycerol molecules. This packing mode is confirmed by de-solvation experiments where the V(glycerol) amylose crystals, annealed in ethanol, could be converted into V(H) amylose without losing their external appearance. The V(glycerol) amylose crystals could be seeded by cellulose microfibrils to yield a shish-kebab structure where the amylose crystalline lamellae grew perpendicular to the microfibril directions.
Surface soil moisture maps using airborne PBMR and portos measurements in Hapex Sahel.
Chanzy, A. ; Kerr, Y. ; Oevelen, P.J. van; Schmugge, T. - \ 1994
In: Eur. Geophys. Soc. Part 2: Oceans, atmosphere, hydrology & nonlinear geophysics. Vol. 12, Grenoble - p. C339 - C339.
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