The impact of the retention curve hysteresis on prediction of soil water dynamics

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Title:The impact of the retention curve hysteresis on prediction of soil water dynamics
Creators:
Dohnal, Michal; dohnalm at mat dot fsv dot cvut dot cz; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague, Czech Republic
Dušek, Jaromír; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague, Czech Republic
Vogel, Tomáš; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague, Czech Republic
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 54, 3, pp. 258-268
Uncontrolled Keywords:Hysteresis, Hydraulic Properties, Soil Water Pressure Development, Inverse Modeling

Abstract

The main objective of this study is to assess the effect of hysteresis of soil hydraulic properties on model predictions of soil water movement in a variably saturated soil. The model predictions are generated by the S1D model, which is based on numerical solution of one-dimensional Richards’ equation. The analysis is made for a loamy sand soil located in a small headwater catchment. The model is used to simulate the development of soil water pressure during three successive vegetation seasons. Three major simulation scenarios are formulated: the first scenario assumes no hysteresis in soil hydraulic properties, the second scenario involves a predefined hypothetical hysteresis, while the third scenario is based on optimized hysteresis, determined through the inverse modeling procedure. The analysis of the simulation results suggests that, in our case, ignoring hysteresis does not lead to any significant deviation of the model predictions from the observed soil water system responses.

Official URL: http://147.213.145.2/vc/vc1.asp

Title:The impact of the retention curve hysteresis on prediction of soil water dynamics
Translated title:Vliv hystereze retenční křivky na predikci dynamiky půdní vody
Creators:
Dohnal, Michal; dohnalm at mat dot fsv dot cvut dot cz; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague, Czech Republic
Dušek, Jaromír; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague, Czech Republic
Vogel, Tomáš; Czech Technical University in Prague, Faculty of Civil Engineering, Thákurova 7, 166 29 Prague, Czech Republic
Uncontrolled Keywords:Hysteresis, Hydraulic Properties, Soil Water Pressure Development, Inverse Modeling
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Mathematics, Physics and Earth Sciences > Institute of Hydrodynamics > Journal of Hydrology and Hydromechanics
Journal or Publication Title:Journal of Hydrology and Hydromechanics
Volume:54
Number:3
Page Range:pp. 258-268
ISSN:0042-790X
Publisher:Institute of Hydrology of the Slovak Academy of Sciences and the Institute of Hydrodynamics of the Academy of Sciences of the Czech Republic
Related URLs:
URLURL Type
http://avi.lib.cas.cz/node/55Publisher
ID Code:5929
Item Type:Article
Deposited On:11 Jun 2010 14:43
Last Modified:11 Jun 2010 12:43

Citation

Dohnal, Michal; Dušek, Jaromír; Vogel, Tomáš (2006) The impact of the retention curve hysteresis on prediction of soil water dynamics. Journal of Hydrology and Hydromechanics, 54 (3). pp. 258-268. ISSN 0042-790X

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