张家口市清水河流域水环境质量评价及前景预测

Evaluation and Prospect of Qingshui River river water environment quality in Zhangjiakou City

通过对张家口市清水河流域进行实地考察与采样,分析了清水河流域水环境存在的基本问题,选取PH值、溶解氧、高锰酸盐指数、五日生化需氧量(BOD_5)、氨氮(NH_3-N)、总磷(TP)、氰化物、砷、铅、六价铬10个项目作为清水河流域水环境质量的主要评价指标,依据国家《地表水环境质量标准》对原始水样进行了检测分析.检测结果表明,清水河水源地毒性指标较低,重金属污染指数较小;水体中氨氮(NH_3-N)、总磷(TP)的含量相对较高,水源地水质趋于富营养化水平;综合分析显示清水河地表水水源地水质符合国家Ⅲ类水质要求.针对官厅水库永定河流域清水河水源涵养地保护中存在的问题,提出了相关建议并对其可持续发展前景进行了预测分析.

according to field investigation and sampling in the Qingshui River Valley of Zhangj iakou City,analyzes the Qingshui River Basin water environment are the basic problems,selection of pH value,dissolved oxygen,permanganate index,five day biochemical oxygen demand amount （BOD5 ）,ammonia nitrogen （NH3-N）,total phosphorus （TP）,cyanide,arsenic,lead,hexavalent chromium 1 0 proj ect as the main evaluation index of the Qingshui River Basin water environment quality,according to the national“surface water environment quality standard”of the original water were analysis and detection.Test results show that the Qingshui River water toxicity index is low,heavy metal pollution index is small;water ammonia nitrogen （NH3-N）,total phosphorus （TP）content is relatively high,water source water quality tends to eutrophication level;compre-hensive analysis shows Qingshui River surface water source to water quality compliance with the third class of the national water quality requirements.In view of the problems existing in the Guanting reservoir and Yongding River Basin Qingshuij iang River source contains nourishing pro-tection,and puts forward the relevant suggestions and analysis and forecast of the prospects for sustainable development.