基于GIS的万泉河流域生态敏感性分析

为了了解万泉河流域存在的生态问题，利用调查资料和相关研究数据，选取坡度、高程、土壤类型、水域缓冲区、土地利用类型5个单生态敏感性因子作为评价指标，在GIS的支持下，进行综合生态敏感性分析。结果表明：（1）轻度敏感区(38.69%)>不敏感区(26.7%)>中度敏感区(22.84%)>高度敏感区(8.38%)>极度敏感区(3.39%)；（2）极度敏感区主要分布在流域的上游，高度敏感区则零散的分布在整个流域，中度敏感区主要分布流域中上游，轻度敏感区、不敏感区则集中分布在流域的中下游。表明万泉河流域的生态敏感性在空间分布上存在差异，生态敏感度较低，生态环境状况良好。

Ecological Sensitivity Analysis on Wanquan River Watershed Based on GIS

In order to understand the ecological problems in Wanquan River watershed,the author selected 5 ecological sensitive evaluation factors,including slope degree,elevation,soil type,water buffer and land use type to analyze ecological sensitivity comprehensively based on GIS,using the survey material and related research data.The results indicated：（1） low sensitive areas（38.69%）non-sensitive areas（26.7%）moderately sensitive areas（22.84%）highly sensitive areas（8.38%）extremely sensitive areas（3.39%）.（2） The extremely sensitive areas were mainly distributed the upper reaches of catchment,the highly sensitive areas were scattered the all the watershed,moderately sensitive areas were mainly distributed the upper-middle reaches, the low sensitive and non-sensitive areas were concentrated in the lower-middle reaches of watershed.This demonstrated that the spatial distribution of ecological sensitivity of Wanquan River basin was significantly different,the ecological sensitivity was low,the ecological environment had good condition.