南京夹江饮用水源地环境安全评价

Environmental Safety Assessment of Jiajiang Drinking Water Source

我国利用遥感手段进行水源地安全监测主要针对湖库型饮用水源地,而对于河流型饮用水源地的监测较少。建立了以非点源、固定源、流动源三类风险源为一级指标的饮用水源地环境安全评价指标体系,构建了基于环境安全指数的饮用水源地环境安全评价方法,以南京夹江饮用水源地为例,利用高分影像进行土地利用分类、风险源提取,结合地面调查资料获得了各类风险指标信息,对其饮用水源地环境安全状况进行评价。结果显示,2014年1月10日夹江饮用水源地环境安全指数为11.17,处于中等安全水平;2014年12月24日夹江饮用水源地环境安全指数为10.89,处于较高等安全水平。

In China,the safety monitoring of water sources by remote sensing is mainly aimed at lake reservoir type drinking water sources,but the monitoring of river type drinking water sources is less.Firstly,a first class indicator system for environmental safety evaluation of drinking water source was built based on the three types of risk sources（i.e.,non-point source,fixed source,and flow source）.Then,a method for environmental safety evaluation of drinking water source was promoted based on environmental safety index（ESI）.A case study was applied on Jiajang River for evaluating the environmental safety of drinking water sources by using GF-1 imagery,in which the land use classes and risk sources were extracted by combining the ground investigation.The results show that the ESI of drinking water source in Jiajiang River was 11.17 at January 10,2014,which was at the medium level,and decreased to 10.89 at December 24,2014,which was at the medium level and the slightly safer level.