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Information Content of Data for Identifying Soil Hydraulic Parameters from Outflow Experiments

J.A. Vrugt, W. Bouten and A.H. Weerts

Institute for Biodiversity and Ecosystem dynamics, University of Amsterdam, Nieuwe Prinsengracht 130, Amsterdam, 1018 VZ, the Netherlands



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Fig. 1. Simulated cumulative outflow, water content, and flux density of the sandy soil as function of time during the multi-step outflow experiment. MC refers to Monte Carlo simulation

 


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Fig. 2. Contours of the objective function OF(b) in the (a) {theta}sn, (b) {alpha}n, (c) {theta}s{alpha}, (d) {theta}rn, (e) Ks{lambda}, and (f) {theta}rKs parameter planes

 


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Fig. 3. Information content of (A) cumulative outflow, (B) water content, and (C) flux density measurements for the six Mualem–van Genuchten parameters (1–6) at different iterations. For a full explanation see text

 


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Fig. 4. Contours of the objective function in the Ks{lambda} parameter plane calculated for the selected subsets of measurements as distinguished with PIMLI

 


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Fig. 5. Information content as function of iteration number for the different soil hydraulic parameters of the sandy soil

 


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Fig. 6. Water retention curve of the clayey soil used in the reference run and the retention curve as found with PIMLI after 20 iterations

 





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The Plant Genome
Copyright © 2001 by the Soil Science Society of America.