关键词: 生态环境, 生态资源, 生态安全评价, 指标体系, 空间分析, GIS, 泸水市

Abstract: Lushui County is located in source area of Changjiang River, Lancang River and Nujiang River, which is an important part of the Shangri-La ecological tourism zone. In recent years, due to various reasons, its ecological environment has deteriorated. Ecological security evaluation can provide reference for the ecological environment protection in Lushui County. Based on the major ecological problems, human interference and natural elements in the study area，we constructed an ecological security evaluation index system. Analytic hierarchy process, entropy method and GIS were adopted to evaluate the regional ecological security. The average eco-safety index of the study area is 41.95 generally in a relatively safe level. Taking the Nujiang River as an axis, a north-south zonal distribution appears along the river, while on the east-west direction; the closer the location to the Nujiang River, the lower the level of ecological security is, following a symmetrical distribution pattern. The insecure areas and residential areas follow a similar spatial distribution, which shows that human activities have a greater impact on ecological security. The area of cultivated land is the largest among insecure areas, taking up more than 50% of the area, followed by unused land and construction land. Pianma Town is a township in Lushui County with the best overall ecological security level.

Key words: ecological environment, natural resources, ecological security evaluation, ecological problem, index system, spatial analysis, GIS, Lushui County