GIS支持下的九龙县居民地适宜性研究

九龙县是四川省西部重要的水电和矿业大县,人类工程活动和不恰当选址导致县内居民地频频遭受各种侵害,通过对居民地适宜性分析对减轻县内地质灾害损失、提高居住质量、指导工程建设及生态移民具有重要的意义。采用目标分析法对评价目标进行分解,形成三层结构,选择工程地质岩组、地质构造和地质灾害易发性等10个评价因子形成评价指标体系。应用地理信息系统软件对评价因子进行数字化并做叠加分析,最后划定了优、良、中、差四个土地适宜性级别,并讨论了县内居民地的发展趋势。

Study on the Suitability of Residential Area in Jiulong County with GIS

Jiulong County is an important hydropower and mining county in the west of Sichuan province,human being activities and inappropriate sitting led to frequent subject to various hazards,thus it is vital to do suitability evaluation of residential area to reduce hazards' loss,improve living quality,and guide engineering and ecological migration.In this paper the analytical method was used to decompound the evaluaton aim,a three-tier structure was adopted,and chooses the engineering geology groups,geological structure,geological hazard probability and other factors were chosen to inform evaluation indicators system.GIS software is used to digitalize evaluation factors and overlay them,then excellent,good,medium and poor land suitability four-level were gotten.Finally the development trend of residential areas was discussed.