Calculation framework for agricultural irrigation water consumption in multi-source irrigation systems

Di Wu, Yuanlai Cui, Dacheng Li, Manyu Chen, Xugang Ye, Guofu Fan and Lanqiang Gong

Agricultural Water Management, 2021, vol. 244, issue C

Abstract: This study proposed a calculation framework to reasonably and effectively calculate the agricultural irrigation water consumption (AIWC) and reused irrigation return flow (IRFr) 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 IRFr of the irrigation system increased as the degree of drought increased. The improved total AIWC (AIWCnew,g), which considered the reuse of return flow, is less than the traditional total AIWC (AIWCo,g). In addition to the backbone water source of the Zhanghe Reservoir, 44.54% of the AIWCo,g of the YSD watershed came from ponds inside the YSD watershed under multiyear average conditions. The IRFr accounted for 6.49% of the AIWCo,g, and the AIWCnew,g accounted for 93.51% of the AIWCo,g. For accuracy and management, this calculation framework and improved AIWC are suggested to be used in the multi-source irrigation systems.

Keywords: Calculation framework; Agricultural irrigation water consumption; Multi-source irrigation system; Modified SWAT; Reuse of return flow (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:244:y:2021:i:c:s0378377420321508

DOI: 10.1016/j.agwat.2020.106603

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