Modelling soil water content variations under drought stress on soil column cropped with winter wheat

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Title:Modelling soil water content variations under drought stress on soil column cropped with winter wheat
Creators:
Csorba, Szilveszter; Szent István University, Páter Károly u. 1, Gödöllő 2100, Hungary.
Raveloson, Andrea; Eötvös Loránd University, Pázmány Péter sétány 1/A, Budapest 1117, Hungary.
Tóth, Estzer; Institute for Soil Sciences and Agricultural Chemistry, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman O. u. 15, Budapest 1022, Hungary.
Nagy, Viliam; Institute of Hydrology, Slovak Academy of Sciences, Racianska 75, 81302 Bratislava, Slovak Republic.
Farkas, Csilla; csilla dot farkas at bioforsk dot no; Bioforsk, Norwegian Institute for Agricultural and Environmental Research, Fr. A. Dahlsvei 20, Ås 1430, Norway.
Journal or Publication Title:
Journal of Hydrology and Hydromechanics, 62, 4, pp. 269-276
Uncontrolled Keywords:climatic room, SWAP model, soil water balance elements, drought stress, temporal variability of soil properties

Abstract

Mathematical models are effective tools for evaluating the impact of predicted climate change on agricultural production, but it is difficult to test their applicability to future weather conditions. We applied the SWAP model to assess its applicability to climate conditions, differing from those, for which the model was developed. We used a database obtained from a winter wheat drought stress experiment. Winter wheat was grown in six soil columns, three having optimal water supply (NS), while three were kept under drought-stressed conditions (S). The SWAP model was successfully calibrated against measured values of potential evapotranspiration (PET), potential evaporation (PE) and total amount of water (TSW) in the soil columns. The Nash-Sutcliffe model efficiency coefficient (N-S) for TWS for the stressed columns was 0.92. For the NS treatment, we applied temporally variable soil hydraulic properties because of soil consolidation caused by regular irrigation. This approach improved the N-S values for the wetting-drying cycle from –1.77 to 0.54. We concluded that the model could be used for assessing the effects of climate change on soil water regime. Our results indicate that soil water balance studies should put more focus on the time variability of structuredependent soil properties.

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

Title:Modelling soil water content variations under drought stress on soil column cropped with winter wheat
Translated title:Modelling soil water content variations under drought stress on soil column cropped with winter wheat
Creators:
Csorba, Szilveszter; Szent István University, Páter Károly u. 1, Gödöllő 2100, Hungary.
Raveloson, Andrea; Eötvös Loránd University, Pázmány Péter sétány 1/A, Budapest 1117, Hungary.
Tóth, Estzer; Institute for Soil Sciences and Agricultural Chemistry, Centre for Agricultural Research, Hungarian Academy of Sciences, Herman O. u. 15, Budapest 1022, Hungary.
Nagy, Viliam; Institute of Hydrology, Slovak Academy of Sciences, Racianska 75, 81302 Bratislava, Slovak Republic.
Farkas, Csilla; csilla dot farkas at bioforsk dot no; Bioforsk, Norwegian Institute for Agricultural and Environmental Research, Fr. A. Dahlsvei 20, Ås 1430, Norway.
Uncontrolled Keywords:climatic room, SWAP model, soil water balance elements, drought stress, temporal variability of soil properties
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:62
Number:4
Page Range:pp. 269-276
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:8348
Item Type:Article
Deposited On:08 Jan 2015 18:41
Last Modified:08 Jan 2015 17:41

Citation

Csorba, Szilveszter; Raveloson, Andrea; Tóth, Estzer; Nagy, Viliam; Farkas, Csilla (2014) Modelling soil water content variations under drought stress on soil column cropped with winter wheat. Journal of Hydrology and Hydromechanics, 62 (4). pp. 269-276. ISSN 0042-790X

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