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	Urbanization, agricultural water use, and regional and national crop production in China
	Yan T. T.; Wang, J. X.; Huang, J. K.
	2015
关键词	Urbanization Agricultural water use Crop areas Crop production Regional and national level in China northern china management footprint economy policy food
英文摘要	The overall goal of this paper is to analyze the impacts of the urbanization on regional and national agricultural production through its impact on water use in agriculture in China, Given the historical trend of water use in agriculture and its correlation with urbanization, the change in agricultural water use due to urbanization is estimated. Then the impacts of this change on regional crop production are simulated based on the China Water Simulation Model (CWSM). Within CWSM, a positive mathematical programming (PMP) optimizes water allocation among crops and between irrigated and rainfed areas within a crop in each of ten river basins in China. The results show that water use in China has an obvious increasing trend, particularly in the industrial and domestic sectors, while the share of water use in agricultural sector has been dropping. A 1-percentage-point increase in urbanization can result in a 0.47 percentage-point decline in share of water use. Based on the model simulation, this will lead to the further decrease of irrigated areas and the increase of rainfed areas at both the national and river basin levels, particularly for water intensive crops (such as rice and wheat). Accordingly, average yields and total production will also decrease. A river basin with large production of either rice or wheat (or both) decreases more in irrigated area as urban area expands. Adaptation measures are recommended for both authorities and farmers to ensure food security, such as providing incentive for farmers to adopt water saving technology, implementing appropriate institutional and policy innovations (e.g., water use association, water pricing and water use rights). (C) 2015 Elsevier B.V. All rights reserved.
出处	Ecological Modelling
卷	318
页	226-235
语种	英语
ISSN号	0304-3800
DOI标识	10.1016/j.ecolmodel.2014.12.021
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/43585]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Yan T. T.,Wang, J. X.,Huang, J. K.. Urbanization, agricultural water use, and regional and national crop production in China. 2015.

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