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Calculation framework for agricultural irrigation water consumption in multi-source irrigation systems
Agricultural Water Management ( IF 6.7 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.agwat.2020.106603 Di Wu , Yuanlai Cui , Dacheng Li , Manyu Chen , Xugang Ye , Guofu Fan , Lanqiang Gong
Agricultural Water Management ( IF 6.7 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.agwat.2020.106603 Di Wu , Yuanlai Cui , Dacheng Li , Manyu Chen , Xugang Ye , Guofu Fan , Lanqiang Gong
Abstract This study proposed a calculation framework to reasonably and effectively calculate the agricultural irrigation water consumption (AIWC) and reused irrigation return flow ( I R F r ) in multi-source irrigation systems based on the modified Soil and Water Assessment Tool (SWAT). The calculation framework was applied in the Yangshudang (YSD) watershed in southern China over the years. Results showed that total AIWC and I R F r of the irrigation system increased as the degree of drought increased. The improved total AIWC ( A I W C n e w , g ), which considered the reuse of return flow, is less than the traditional total AIWC ( A I W C o , g ). In addition to the backbone water source of the Zhanghe Reservoir, 44.54% of the A I W C o , g of the YSD watershed came from ponds inside the YSD watershed under multiyear average conditions. The I R F r accounted for 6.49% of the A I W C o , g , and the A I W C n e w , g accounted for 93.51% of the A I W C o , g . For accuracy and management, this calculation framework and improved AIWC are suggested to be used in the multi-source irrigation systems.
更新日期：2021-02-01
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