Evaluating China's Water Security for Food Production: The Role of Rainfall and Irrigation

被引：28

作者：

Zhu, Wenbin ^{[1
]}

Jia, Shaofeng ^{[1
]}

Devineni, Naresh ^{[2
]}

Lv, Aifeng ^{[1
]}

Lall, Upmanu ^{[3
]}

机构：

[1] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing, Peoples R China

[2] CUNY, Dept Civil Engn, NOAA, Cooperat Remote Sensing Sci & Technol Ctr, New York, NY 10021 USA

[3] Columbia Univ, Columbia Water Ctr, Dept Earth & Environm Engn, New York, NY USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2019年 / 46卷 / 20期

关键词：

water security; food security; irrigation; water risk; agriculture; China; GRAIN PRODUCTION; AGRICULTURE; RESOURCES; DEMAND;

D O I：

10.1029/2019GL083226

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

China's water stress and its pressure on food security is a widely recognized crisis. A framework is proposed and applied at the provincial level to evaluate China's water security for food production. It is based on a water stress index that accounts for the deficit between water supply and aggregate demand of 23 major field crops over the study period (1961-2015). The water demand is estimated based on method recommended by the Food and Agriculture Organization of the United Nations. The water supply is composed of rainfall and irrigation. Consequently, the water security of both rainfed and irrigated agriculture is evaluated in our research, and the respective contribution of rainfall and irrigation is distinguished. Suggestions regarding adjustment in irrigation investment and planting area are proposed for practical application. The framework also holds great potential to investigate the impact of climate change and the virtual water flow of crops.

引用

页码：11155 / 11166

页数：12

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