地下水源环境质量红线划定技术方法研究

Technical Methods of Delimiting Groundwater Sources Environmental Quality Red Line

地下水源环境质量红线是"生态保护红线"整体框架的重要组成部分,其划定是"建立系统完整的生态文明制度体系,实行最严格的源头保护制度"的充分体现。以地下水饮用水水源一级保护区边界作为地下水源环境质量红线,"红线"内按照饮用水水源一级保护区管理要求实施相应措施。以滕州市某地下饮用水源地为例,利用MODFLOW建立研究区地下水流模型。选用某正常年份4个地下水位观测井的实测数据对模型进行验证。结果显示,4个地下水位观测井,最小误差为0.14m,最大误差为1.87m,模型计算水位与实际水位较为接近。利用MODPATH进行粒子反向追踪,以粒子运移100d所圈定的区域边界作为地下水源环境质量红线。水源地中心位置距红线最大距离为260m,最小距离为150m。

Groundwater sources environmental quality red line is the important part of the ＂ecological protection red line＂ overall framework. It fully embodies the spirit of the Third Plenary Session of the 18th CPC Central Committee. The ground drinking water source protection area boundary should be the red line. Drinking water source protection area management requires should be implemented in the ＂ red line＂ area. As an example of the underground drinking water in Tengzhou, groundwater sources environmental quality red line was delineated. Four observation wells were selected to validate the model. The results showed that the groundwater flow model could describe the actual situation of the study area. The smallest error was 0. 14m and the maximum error was 1.87m. The area boundary of backtracking partiele running 100d was the groundwater sources environmental quality red line. The maximum distance from the central position of groundwater source to the red line was 260m, and the minimum distance was 150m.