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The influence of optimized allocation of agricultural water and soil resources on irrigation and drainage in the Jingdian Irrigation District, China

  • Jingsi Li
  • Liangjun FeiEmail author
  • Shan Li
  • Zhongxing Shi
  • Lihua Liu
Original Paper
  • 7 Downloads

Abstract

Reasonable regulation of irrigation and drainage is an important way to decrease water resource waste and water pollution, and to ensure the sustainable utilization of water resources. In this study, appropriate irrigation and drainage methods are proposed by optimizing agricultural water and soil resources based on the current status of water resource utilization in irrigation district in Northwest China, and as much as possible to reduce the amount of irrigation and drainage while ensuring the necessary for salt leaching. A two-layer model was considered to maximize economic benefits and relative production through a nonlinear algorithm to optimize the crop acreage, irrigation quota and the amount of irrigation water at each crop growth stage. A support vector machine regression model for predicting drainage was constructed, including drainage and irrigation, precipitation, evaporation and groundwater depth. Additionally, the amount of drainage water was compared before and after the optimization of irrigation. The amount of irrigation water demand in a wet year (2014), normal year (2008) and dry year (2013) decreased by 23.85 million m3, 12.85 million m3 and 17.50 million m3, respectively, after optimization of the crop planting structure and irrigation scheduling. Furthermore, the net economic benefit increased by 3.76 billion yuan, 1.14 billion yuan and 2.34 billion yuan, as compared with the actual output value. The amount of drainage water decreased by 8.60%, 8.93% and 5.21% compared to that with no optimization in a wet year (2014), normal year (2008) and dry year (2013), respectively. This method can scientifically allocate the amount of irrigation and drainage, feasibly improve economic benefits and prevent soil salinization, thus providing guidance for efficient water resource utilization and ecological protection in arid areas.

Notes

Acknowledgement

This work is partly supported by the National Natural Science Foundation of China (51779205); Gansu Province Jingtaichuan Electric Pumping Irrigation District Return (Regression) Water Monitoring and Utilization Research Project Contract (ZKGK-2016-023).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Jingsi Li
    • 1
  • Liangjun Fei
    • 1
    Email author
  • Shan Li
    • 1
  • Zhongxing Shi
    • 2
  • Lihua Liu
    • 1
  1. 1.State Key Laboratory of Eco-Hydraulics in Northwest Arid Region of ChinaXi’an University of TechnologyXi’anChina
  2. 2.Gansu Jingtaichuan Irrigation Management BureauJingtaiChina

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