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Article

Effects of Crop Planting Structure Adjustment on Water Use Efficiency in the Irrigation Area of Hei River Basin

by 1,2,3, 1,2,*, 1,2,*, 1,2 and 1,2
1
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
2
National Center of Efficient Irrigation Engineering and Technology Research, Beijing 100048, China
3
China Agricultural University of Water Conservancy and Civil Engineering, Beijing 100083, China
*
Authors to whom correspondence should be addressed.
Water 2018, 10(10), 1305; https://doi.org/10.3390/w10101305
Received: 21 August 2018 / Revised: 12 September 2018 / Accepted: 16 September 2018 / Published: 22 September 2018
(This article belongs to the Special Issue Water-Energy-Food Nexus in Asia, with Focus on the Mekong Region)
The adjustment of crop planting structure can change the process of water and material circulation, and thus affect the total amount of water and evapotranspiration in the irrigation district. To guide the allocation of water resources in the region, it is beneficial to ascertain the effects of changing the crop planting structure on water saving and farmland water productivity in the irrigation district. This paper takes Yingke Irrigation District as the background. According to the continuous observation data from 2012 to 2013, Based on the modified Soil and Water Assessment Tool (SWAT) model and taking advantage of monthly scale remote sensing EvapoTranspiration (ET) and crop growth parameters (leaf area index and shoot dry matter), we tested the simulation accuracy of the model, proposed irrigation efficiency calculation methods considering water drainage, and established the scenario analysis method for the spatial distribution of crop planting structure. Finally, we evaluated the changes in water savings in irrigation district projects and resources, the irrigation water productivity and the net income water productivity under different planting structure scenarios. The results indicate that the efficiency of irrigation has increased by 15~20%, while considering drainage, as compared with conventional irrigation efficiency. Additionally, the adjustment of crop planting structure can reduce regional evapotranspiration by 14.9%, reduce the regional irrigation volume by 30%, and increase the net income of each regional water area by 16%. View Full-Text
Keywords: crop planting structure; the modified soil and water assessment tool; water use efficiency; optimization crop planting structure; the modified soil and water assessment tool; water use efficiency; optimization
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MDPI and ACS Style

Han, X.; Wei, Z.; Zhang, B.; Han, C.; Song, J. Effects of Crop Planting Structure Adjustment on Water Use Efficiency in the Irrigation Area of Hei River Basin. Water 2018, 10, 1305. https://doi.org/10.3390/w10101305

AMA Style

Han X, Wei Z, Zhang B, Han C, Song J. Effects of Crop Planting Structure Adjustment on Water Use Efficiency in the Irrigation Area of Hei River Basin. Water. 2018; 10(10):1305. https://doi.org/10.3390/w10101305

Chicago/Turabian Style

Han, Xin, Zheng Wei, Baozhong Zhang, Congying Han, and Jianzheng Song. 2018. "Effects of Crop Planting Structure Adjustment on Water Use Efficiency in the Irrigation Area of Hei River Basin" Water 10, no. 10: 1305. https://doi.org/10.3390/w10101305

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