Article (Scientific journals)
Estimating Soil Water Retention Curve by Inverse Modelling from Combination of In Situ Dynamic Soil Water Content and Soil Potential Data
Ket, Pinnara; Oeurng, Chantha; Degré, Aurore
2018In Soil Systems, 2 (55)
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Keywords :
soil water retention curve; soil hydraulic properties; irrigation management; HYDRUS-1D; cambodia
Abstract :
[en] Soil water retention curves (SWRCs) are crucial for characterizing soil moisture dynamics, and are particularly relevant in the context of irrigation management. Inverse modelling is one of the methods used to parameterize models representing these curves, which are closest to the field reality. The objective of this study is to estimate the soil hydraulic properties through inverse modelling using the HYDRUS-1D code based on soil moisture and potential data acquired in the field. The in situ SWRCs acquired every 30 min are based on simultaneous soil water content and soil water potential measurements with 10HS and MPS-2 sensors, respectively, in five experimental fields. The fields were planted with drip-irrigated lettuces from February to March 2016 in the Chrey Bak catchment located in the Tonlé Sap Lake region, Cambodia. After calibration of the van Genuchten soil water retention model parameters, we used them to evaluate the performance of HYDRUS-1D to predict soil moisture dynamics in the studied fields. Water flow was reasonably well reproduced in all sites covering a range of soil types (loamy sand and loamy soil) with root mean square errors ranging from 0.02 to 0.03 cm3 cm−3.
Disciplines :
Agriculture & agronomy
Author, co-author :
Ket, Pinnara ;  Université de Liège - ULiège > Form. doct. sc. agro. & ingé. biol. (paysage)
Oeurng, Chantha;  Faculty of Hydrology and Water Resources Engineering, Institute of Technology of Cambodia
Degré, Aurore  ;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Echanges Eau-Sol-Plantes
Language :
English
Title :
Estimating Soil Water Retention Curve by Inverse Modelling from Combination of In Situ Dynamic Soil Water Content and Soil Potential Data
Publication date :
2018
Journal title :
Soil Systems
eISSN :
2571-8789
Publisher :
Molecular Diversity Preservation International (MDPI), Basel, Switzerland
Volume :
2
Issue :
55
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 10 October 2018

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