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Ecological Vulnerability Assessment and Cause Analysis of the Farming-Pastoral Zone in Northern China-Taking Yulin City as an Example

机译：中国北方农牧交错带生态脆弱性评价及成因分析-以榆林市为例

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The farming-pastoral zone in China is located in the monsoonal region. It has large fluctuations in precipitation and land use. It is one of the most obvious areas of ecological vulnerability. Taking Yulin City of Shanxi Province as an example, this paper builds an indicator system and then uses principal component analysis (PCA) and analytic hierarchy process (AHP) to filter indicators and determine weights. Finally, this paper establishes an ecological vulnerability index (EVI) model. Through the classification of EVI, the spatial distribution map of ecological vulnerability in Yulin City is obtained. The results show that the ecological vulnerability in Yulin City tends to decrease from north to south. Among counties, Fugu, Shenmu, Yuyang and Dingbian are extremely fragile, and the main causes of ecological vulnerability are economics, landscape diversity, annual precipitation and vegetation coverage.
机译：中国的农牧区位于季风区。它的降雨量和土地使用量都有很大的波动。它是生态脆弱性最明显的地区之一。以山西省榆林市为例，建立指标体系，然后运用主成分分析（PCA）和层次分析法（AHP）对指标进行筛选和确定权重。最后，本文建立了生态脆弱性指数（EVI）模型。通过EVI分类，得到榆林市生态脆弱性空间分布图。结果表明，榆林市生态脆弱性由北向南呈下降趋势。在富固县，神木县，榆阳县和定边县之间，生态脆弱性的主要原因是经济，景观多样性，年降水量和植被覆盖率。

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