大沽夹河流域水环境评价及污染防治对策

根据1998年至2002年犬沽夹河流域水环境质量监测资料，选取CODCr、BOD5、总磷（TP）、氨氮（NH3-N）、总氮（TN）、pH和溶解氧（DO）7项评价指标。对犬沽夹河流域水环境质量现状进行了评价．结果表明，大活夹河水质污染严重，主要污染物为总氮．根据流域水质污染的特征和存在的问题，提出强化面源削减、城市污水集中处理、严格控制增加新污染源、进行面源污染控制量化研究四方面的综合防治时策．

Water Environment Assessment And Protection Measures of Dagujia River Valley

Based on environmental monitoring data from 1998 to 2002 for Dagujia River water quality, seven indexes including CODcr, BOD5 , total phosphorus, ammonia-nitrogen, total nitrogen, pH, and dissolved oxygen are surveyed and analyzed to assess the water environment quality of the river. The results show that the water environment is polluted seriously and the main pollutant is total nitrogen. Water environment protection measures and pollution control planning , such as cut of pollutants from surface sources, treatment of urban wastewater collection, control of new pollution source, investigation on controlled quantity of surface source pollution, etc. are proposed based on water environment features and practical problems.