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Title

SWAT application in intensive irrigation systems: Model modification, calibration and validation

AuthorsDechmi, Farida ORCID; Burguete Tolosa, Javier CSIC ORCID ; Skhiri, Ahmed
KeywordsCalibration
Irrigation systems
Phosphorus
Sediments
Validation
Watershed
Issue DateNov-2012
PublisherElsevier
CitationDechmi F, Burguete J, Skhiria A. SWAT application in intensive irrigation systems: Model modification, calibration and validation. Journal of Hydrology 470–471: 227–238 (2012)
AbstractThe Soil and Water Assessment Tool (SWAT) is a well established, distributed, eco-hydrologic model. However, using the study case of an agricultural intensive irrigated watershed, it was shown that all the model versions are not able to appropriately reproduce the total streamflow in such system when the irrigation source is outside the watershed. The objective of this study was to modify the SWAT2005 version for correctly simulating the main hydrological processes. Crop yield, total streamflow, total suspended sediment (TSS) losses and phosphorus load calibration and validation were performed using field survey information and water quantity and quality data recorded during 2008 and 2009 years in Del Reguero irrigated watershed in Spain. The goodness of the calibration and validation results was assessed using five statistical measures, including the Nash–Sutcliffe efficiency (NSE). Results indicated that the average annual crop yield and actual evapotranspiration estimations were quite satisfactory. On a monthly basis, the values of NSE were 0.90 (calibration) and 0.80 (validation) indicating that the modified model could reproduce accurately the observed streamflow. The TSS losses were also satisfactorily estimated (NSE = 0.72 and 0.52 for the calibration and validation steps). The monthly temporal patterns and all the statistical parameters indicated that the modified SWAT-IRRIG model adequately predicted the total phosphorus (TP) loading. Therefore, the model could be used to assess the impacts of different best management practices on nonpoint phosphorus losses in irrigated systems.
Description45 Pags., 8 Figs., 3 Tabls. The definitive version is available at: http://www.sciencedirect.com/science/journal/00221694
Publisher version (URL)http://dx.doi.org/10.1016/j.jhydrol.2012.08.055
URIhttp://hdl.handle.net/10261/66927
DOI10.1016/j.jhydrol.2012.08.055
ISSN0022-1694
Appears in Collections:(EEAD) Artículos

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