气候变化领域集成服务门户(CCPortal): Changing global cropping patterns to minimize national blue water scarcity

CCPortal

DOI	10.5194/hess-24-3015-2020
	Changing global cropping patterns to minimize national blue water scarcity
	Chouchane H.; Krol M.S.; Hoekstra A.Y.
发表日期	2020
ISSN	1027-5606
起始页码	3015
结束页码	3031
卷号	24 期号:6
英文摘要	Feeding a growing population with global natural-resource constraints becomes an increasingly challenging task. Changing spatial cropping patterns could contribute to sustaining crop production and mitigating water scarcity. Previous studies on water saving through international food trade focussed either on comparing water productivities among food-trading countries or on analysing food trade in relation to national water endowments. Here, we consider, for the first time, how both differences in national average water productivities and water endowments can be considered to analyse comparative advantages of countries for different types of crop production. A linear-optimization algorithm is used to find modifications in global cropping patterns that reduce national blue water scarcity in the world's most severely water-scarce countries, while keeping global production of each crop unchanged and preventing any increase in total irrigated or rainfed harvested areas in each country. The results are used to assess national comparative advantages and disadvantages for different crops. Even when allowing a maximum expansion of the irrigated or rainfed harvested area per crop per country of only 10 %, the blue water scarcity in the world's most water-scarce countries can be greatly reduced. In this case, we could achieve a reduction of the global blue water footprint of crop production of 21 % and a decrease of the global total harvested and irrigated areas of 2 % and 10 % respectively. Shifts in rainfed areas have a dominant share in reducing the blue water footprint of crop production. © Author(s) 2020.
语种	英语
scopus关键词	Commerce; Cultivation; Harvesting; Linear programming; Productivity; Water conservation; Comparative advantage; Cropping patterns; Global production; International food trade; Linear optimization; Resource Constraint; Water - savings; Water productivity; Crops; algorithm; crop production; cropping practice; global change; international trade; natural resource; resource scarcity; water footprint; water use
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159378
作者单位	Chouchane, H., Twente Water Centre, University of Twente, Enschede, Netherlands; Krol, M.S., Twente Water Centre, University of Twente, Enschede, Netherlands; Hoekstra, A.Y., Twente Water Centre, University of Twente, Enschede, Netherlands, Institute of Water Policy, Lee Kuan Yew School of Public Policy, National University of Singapore, Singapore, Singapore
推荐引用方式 GB/T 7714	Chouchane H.,Krol M.S.,Hoekstra A.Y.. Changing global cropping patterns to minimize national blue water scarcity[J],2020,24(6).
APA	Chouchane H.,Krol M.S.,&Hoekstra A.Y..(2020).Changing global cropping patterns to minimize national blue water scarcity.Hydrology and Earth System Sciences,24(6).
MLA	Chouchane H.,et al."Changing global cropping patterns to minimize national blue water scarcity".Hydrology and Earth System Sciences 24.6(2020).