基于地理信息系统的抚仙湖流域生态敏感性分析

Ecological Sensitivity Analysis of Fuxian Lake Basin Based on Geographic Information System

抚仙湖位于云南省玉溪市,流域生态资源丰富,但存在潜在环境风险。地理信息系统(Geographic Information System,GIS)具有强大的空间分析能力,常用于分析流域生态敏感性。为了保护抚仙湖,有必要建立评价因子指标体系,采用ArcGIS软件分析抚仙湖流域生态敏感性,得到生态敏感性分区的面积比例,确定抚仙湖流域的生态保护区域。分析结果显示,极敏感区占流域面积的26.79%,属于重点保护区;高敏感区占比仅为2.01%,应限制人类活动对该区域的干扰;中敏感区占比为13.26%,开发前应专门进行可行性论证;低敏感区占比为27.48%,可进行适度开发;不敏感区占比为30.46%,可进行多用途开发。

Fuxian Lake is located in Yuxi city,Yunnan province,with abundant ecological resources in the basin,but there are potential environmental risks.Geographic Information System(GIS)has powerful spatial analysis capabilities and is commonly used to analyze watershed ecological sensitivity.In order to protect Fuxian Lake,it is necessary to establish an evaluation factor index system,use ArcGIS software to analyze the ecological sensitivity of the Fuxian Lake basin,obtain the area ratio of ecological sensitivity zones,and determine the ecological protection area of the Fuxian Lake basin.The analysis results show that the extremely sensitive area accounts for 26.79%of the watershed area and belongs to the key protected area;the proportion of highly sensitive areas is only 2.01%,and human interference in this area should be limited;the proportion of medium sensitive areas is 13.26%,and a feasibility study should be conducted before development;the proportion of low sensitivity areas is 27.48%,which can be moderately developed;the proportion of insensitive areas is 30.46%,which can be used for multi-purpose development.