干旱区生态环境知识资源中心(Arid): 榆林市脆弱生态空间分异特征及脆弱度分析

Arid

	榆林市脆弱生态空间分异特征及脆弱度分析
其他题名	Spatial Differentiation Character of Fragile Ecology and Fragility Analysis in Yulin City
	王宏伟; 张鑫; 邱俊楠
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2010
卷号	17 期号:3 页码:184-188
中文摘要	生态环境的脆弱性是自然因素和人为因素共同作用的结果. 采用干旱指数、人口集中指数、系统熵等指标与方法,对榆林市的气候、人口、经济以及人均水资源等脆弱因子的空间分异特征进行定量分析研究. 结果表明,榆林市的干旱指数由东向西逐渐增大,为半湿润半干旱型气候;人口分布趋于均匀并继续分散;经济发展不平衡,主要集聚在神木县、榆阳区和府谷县;人均水资源西多东少并且整体上逐年减少. 基于统计资料,建立评价指标体系,结合主成分分析法和聚类分析法,构建数学模型计算脆弱度并进行等级划分. 分析表明,将榆林市生态脆弱性划分为五个等级,脆弱度以榆阳区为中心向四周减弱
英文摘要	The fragility of ecological environment results from natural factor and human factor. The spatial differentiation character of climate, population, per capita water resources and economy are analyzed quantitatively by indicators and methods including drought index, population concentration index, system entropy, etc in Yulin city. The results are as follows: Yulin city whose drought index increases gradually from east to west belongs to semi-humid and semi-arid climate; the distribution of population tends to be uniform and decentralizes continually; the economy develops unevenly and mostly concentrates in the Shenmu county, Yuyang region and Fugu county; per capita water resources is more in the west than in the east and decreases every year as a whole. Based on statistical data, this paper calculates and assorts the fragility through combination between principal component analysis and cluster analysis and mathematical model after the evaluation index system is structured. Analysis indicates that the ecological fragility in Yulin city is divided into five levels and Yuyang region is the center weakened to all around
中文关键词	空间分异 ; 主成分分析 ; 聚类分析法 ; 脆弱度
英文关键词	spatial differentiation principal component analysis cluster analysis fragility
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:3962122
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225678
作者单位	西北农林科技大学水利与建筑工程学院, 杨陵, 陕西 712100, 中国
推荐引用方式 GB/T 7714	王宏伟,张鑫,邱俊楠. 榆林市脆弱生态空间分异特征及脆弱度分析[J]. 西北农林科技大学,2010,17(3):184-188.
APA	王宏伟,张鑫,&邱俊楠.(2010).榆林市脆弱生态空间分异特征及脆弱度分析.水土保持研究,17(3),184-188.
MLA	王宏伟,et al."榆林市脆弱生态空间分异特征及脆弱度分析".水土保持研究 17.3(2010):184-188.