基于GIS的通城县生态环境地质脆弱性评价

Evaluation of Eco-environmental Geological Vulnerabilityin Tongcheng County Based on GIS

为了给通城县生态保护与修复提供依据,在生态环境地质调查和综合研究的基础上,共选取了17个评价指标,运用GIS技术、SRP模型和层次分析法对通城县生态环境地质脆弱性作出评价,最终将通城县生态环境地质脆弱性分为5个等级,并划分为7个生态环境地质脆弱性分区。结果显示,生态环境地质极度脆弱区、重度脆弱区、中度脆弱区、轻度脆弱区、微度脆弱区分别占全县国土面积的12.34%、37.50%、16.70%、15.42%、18.04%,其中极度脆弱区主要分布于中部城镇区,重度脆弱区主要分布于北部平原区,微度脆弱区主要分布于西北部及东部山区,轻度、中度脆弱区主要分布于南部丘陵区。

In order to provide the basis for the ecological protection and restoration in Tongcheng County,17 evaluation indexes were selected on the basis of ecological environment geological survey and comprehensive research.GIS technology,SRP model and analytic hierarchy process were used to evaluate the ecological environment geological vulnerability of Tongcheng County.Finally,the eco-environmental geological vulnerability of Tongcheng County is divided into five grades and seven eco-environmental geological vulnerability zones.The results show that the extremely fragile area,severe fragile area,moderate fragile area,mild fragile area and slight fragile area of eco-environmental geology account for 12.34%,37.50%,16.70%,15.42%and 18.04%of the county s land area,respectively.The extremely fragile area is mainly distributed in the central urban area,the severe fragile area is mainly distributed in the northern plain area,the slight fragile area is mainly distributed in the northwest and eastern mountainous areas,and the mild and moderate fragile areas are mainly distributed in the southern hilly area.