基于GIS和RS的自贡市长山盐矿区生态环境评价

ECOLOGICAL ENVIRONMENT ASSESSMENT OF CHANGSHAN SALT MINE IN THE CITY OF ZIGONG BASED ON GIS AND RS

根据研究区生态环境特点和评价指标选取的原则,选取土壤湿度、土地利用/覆盖、地形地貌、土壤盐碱化、土地压占与破坏指数为影响要素层,以评价指标体系中的各个主要细节为指标层,建立长山矿区生态环境评价指标体系,并运用层次分析法确定各评价指标的权重。通过目视解译与计算机自动提取相结合的方式提取评价指标信息,并对各个评价指标进行量化分级以及标准化,运用加权综合评价法建立研究区生态环境综合评价模型,将长山矿区生态环境质量划分为优、良、中、差、劣五个等级。

According to Ecological environment characteristics in area of research and the principle of evaluation index selection, this paper selects soil moisture、the land usage/cover, topography, soil salinization, land pressure and destruction index as influencing factors,and puts each main details of ecological environment evaluation index system as the index layer. Furthermore, this establishes the ecological environment evaluation index system of Changshan salt mine and determines the weight of each evaluation index by using AHP. At the same time, this paper extracts evaluation index information with a combination of visual interpretation and computer automatic extraction, in order to divide area of research into five grades such as excellent, fine, medium, bad and worse, through the use of quantitative grading and standardization of each evaluation index coupled with comprehensive evaluation model.