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

In: Journal of Hydrology and Hydromechanics, vol. 62, no. 4
Szilveszter Csorba - Andrea Raveloson - Eszter Tóth - Viliam Nagy - Csilla Farkas

Details:

Year, pages: 2014, 269 - 276
Keywords:
Climatic room; SWAP model; Soil water balance elements; Drought stress; Temporal variability of soil properties.
Original source URL: http://www.ih.savba.sk/jhh
About article:
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 structure-dependent soil properties.
How to cite:
ISO 690:
Csorba, S., Raveloson, A., Tóth, E., Nagy, V., Farkas, C. 2014. Modelling soil water content variations under drought stress on soil column cropped with winter wheat. In Journal of Hydrology and Hydromechanics, vol. 62, no.4, pp. 269-276. 0042-790X (until 2019) .

APA:
Csorba, S., Raveloson, A., Tóth, E., Nagy, V., Farkas, C. (2014). Modelling soil water content variations under drought stress on soil column cropped with winter wheat. Journal of Hydrology and Hydromechanics, 62(4), 269-276. 0042-790X (until 2019) .