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[1]WANG Hong-wei,ZHANG Xin,QIU Jun-nan.Spatial Differentiation Character of Fragile Ecology and Fragility Analysis in Yulin City[J].Research of Soil and Water Conservation,2010,17(03):184-188.

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Spatial Differentiation Character of Fragile Ecology and Fragility Analysis in Yulin City

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 03 Page number: 184-188 Column: Public date: 2010-06-20

Title:: Spatial Differentiation Character of Fragile Ecology and Fragility Analysis in Yulin City

Author(s):: WANG Hong-wei, ZHANG Xin, QIU Jun-nan; College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China

Keywords:: spatial differentiation; principal component analysis; cluster analysis; fragility

CLC:: X826

DOI:: -

Abstract:: 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.

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