基于单因子指数法的贵阳市南明河上游区综合水质评价

摘要

贵阳市由于其特殊的地质环境 -岩溶地貌,地下水埋深较浅,岩溶地下水为开放的含水系统,地下水极易受到污染.运用单因子评价指数法结合内梅罗指数评价法对贵阳市核心区域——南明河上游区地下水水质进行分析评价.评价项目包括PH值、总硬度、氨氮、挥发性酚类、氟化物和大肠杆菌数目六项,经评价得出:研究区除大肠杆菌数目严重超标,及个别地区水硬度偏高外,其余几项指标全部合格,即研究区基本属于清洁区,整体水质良好,整体可归结为Ⅲ类水质.可对以后岩溶开放系统地下水地区水质评价提供参考与建议.%Because of its special geological environment - Guiyang karst landform and shallow depth of groundwater,the karst groundwater belongs to the open water system,which is easy to cause groundwater pollution. The article combined the single factor index method with Melo index evaluation method to analyze the Evaluation of Guiyang City,Nanming River up-stream region's comprehensive quality of water. The evaluation include:PH,The number of total hardness,ammonia nitrogen, volatile phenol,fluoride and Escherichia coli. I concluded that except the number of Escherichia coli is far exceed quota,and the hardness of water in some areas is high ,others are qualified ,which means that The study area basically belongs to the clean area,the overall quality is good,the whole can be considered as the Ⅲ type water. And the evaluation of Naming River can provide some reference and suggestion in groundwater water quality of the open karst system.