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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Record number 403571
Title Screening and understanding the importance of soil hydrology related factors in a SVAT scheme
Author(s) Metselaar, K.; Dam, J.C. van; Feddes, R.A.
Source [S.l.] : S.n. - 29
Department(s) Soil Physics, Ecohydrology and Groundwater Management
Publication type Research report
Publication year 2006
Keyword(s) waterbalans - hydrologie - landschap - modellen - water balance - hydrology - landscape - models
Categories Soil Physics / Plant Ecology
Abstract In this report a simulation experiment using a hydrological water balance model is executed. Using a little simulation runs as possible, the experiment is set up to estimate the main effect of an individual variable on different water balance terms given simultaneous variation in all other factors. The ranking of the variables in terms of their relative effect suggests a priority in the processes to be incorporated in new versions of a SVAT scheme. The experiment was set up to analyze the effects of 13 variables. Variables varied are leaf area index and its time course, root depth and its time course; profile discretization, description of the soil hydraulic characteristics (Hornberger-Clapp vs. van Genuchten), stoniness, the reduction of vegetation transpiration as a function of moisture content or as a function of soil matric head, the point at which reduction of transpiration occurs, and the lower boundary condition of the soil (lateral drainage at 1 m and an impermeable layer at the bottom of the soil profile or free drainage at the bottom of the profile). Results show that the choice of the lower boundary condition, the maximum root depth, and whether or not leaf area index is a function of time, have a strong effect on yearly and monthly evapotranspiration.
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