Assessment on agricultural drought risk based on variable fuzzy sets model

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	Assessment on agricultural drought risk based on variable fuzzy sets model
其他题名	Assessment on Agricultural Drought Risk Based on Variable Fuzzy Sets Model
	Zhang Dan 1; Wang Guoli 1; Zhou Huicheng 1
	2011
发表期刊	CHINESE GEOGRAPHICAL SCIENCE
ISSN	1002-0063
卷号	21 期号:2 页码:167-175
摘要	Drought is one of the major natural disasters causing huge agricultural losses annually. Regional agricultural drought risk assessment has great significance for reducing regional disaster and agricultural drought losses. Based on the fuzzy characteristics of agricultural drought risk, variable fuzzy sets model was used for comprehensively assessing agricultural drought risk of Liaoning Province in China. A multi-layers and multi-indices assessment model was established according to variable fuzzy sets theory, and agricultural drought risk of all 14 prefecture-level cities was respectively estimated in terms of dangerousness, vulnerability, exposure and drought-resistibility. By calculating the combination weights of four drought risk factors, agricultural drought risk grade of each city was obtained. Based on the assessment results, the spatial distribution maps of agricultural drought risk were drawn. The results shows that eastern cities have lower drought dangerousness than western cities in Liaoning Province totally. Most cities are located in low drought vulnerability region and high drought exposure region. Because of frequent and severe drought since 2000, most cities are located in lower drought-resistibility region. Comprehensive agricultural drought risk presents apparent spatial characteristics, escalating from the east to the west. Drought dangerousness is the most important factor influencing comprehensive agricultural drought risk. Through the spatial distribution maps of drought risk, decision makers could find out drought situation and make decisions on drought resistance conveniently.
其他摘要	Drought is one of the major natural disasters causing huge agricultural losses annually. Regional agricultural drought risk assessment has great significance for reducing regional disaster and agricultural drought losses. Based on the fuzzy characteristics of agricultural drought risk, variable fuzzy sets model was used for comprehensively assessing agricultural drought risk of Liaoning Province in China. A multi-layers and multi-indices assessment model was estab-lished according to variable fuzzy sets theory, and agricultural drought risk of all 14 prefecture-level cities was respec-tively estimated in terms of dangerousness, vulnerability, exposure and drought-resistibility. By calculating the combi-nation weights of four drought risk factors, agricultural drought risk grade of each city was obtained. Based on the as-sessment results, the spatial distribution maps of agricultural drought risk were drawn. The results shows that eastern cities have lower drought dangerousness than western cities in Liaoning Province totally. Most cities are located in low drought vulnerability region and high drought exposure region. Because of frequent and severe drought since 2000, most cities are located in lower drought-resistibility region. Comprehensive agricultural drought risk presents apparent spatial characteristics, escalating from the east to the west. Drought dangerousness is the most important factor influencing comprehensive agricultural drought risk. Through the spatial distribution maps of drought risk, decision makers could find out drought situation and make decisions on drought resistance conveniently.
关键词	NEBRASKA variable fuzzy sets relative membership degree agricultural drought risk risk assessment Liaoning Province
收录类别	CSCD
语种	英语
资助项目	[Key Program of National Key Technology R & D Program of China]
CSCD记录号	CSCD:4155121
引用统计	被引频次：23[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/148004
专题	中国科学院金属研究所
作者单位	1.大连大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Zhang Dan,Wang Guoli,Zhou Huicheng. Assessment on agricultural drought risk based on variable fuzzy sets model[J]. CHINESE GEOGRAPHICAL SCIENCE,2011,21(2):167-175.
APA	Zhang Dan,Wang Guoli,&Zhou Huicheng.(2011).Assessment on agricultural drought risk based on variable fuzzy sets model.CHINESE GEOGRAPHICAL SCIENCE,21(2),167-175.
MLA	Zhang Dan,et al."Assessment on agricultural drought risk based on variable fuzzy sets model".CHINESE GEOGRAPHICAL SCIENCE 21.2(2011):167-175.