福泉市后河水环境治理研究

Study on environmental control of Hou River in Fuquan city

后河为洞庭湖水系的支流之一,丰水期水体总磷、氟和氨氮明显超标,严重影响洞庭湖水体质量。该文以贵州省福泉市后河为研究对象,以实际的勘探和试验资料为支撑,分析后河丰水季节污染的成因,基于"清污分流"的治理理念,提出了在污染源上游采用工程截流地下水的工程措施,在污染源和龙井湾大泉之间采取截排水沟及自动提泵站排水的工程截排清洁的地表水体,减小龙井湾大泉的污染水量,达到丰水期污水不外排至后河的效果。隧道截排工程竣工后,进行了隧道截水能力测量与分析,隧道有效削减洪峰流量占比29.7%。预计治理工程全部实施后,治理工程累计消减洪峰流量占比可达48.2%。福泉市后河水环境治理,可为同类水污染治理提供参考。

Hou River is one of the tributaries of Dongting Lake water system.The total phosphorus,fluorine and ammonia nitrogen of waterobviously exceeded the standard in the wet period,which seriously affected the water quality of Dongting Lake.Taking Hou River in Fuquan City,Guizhou Province as the research object and supported by the actual exploration and test data,this paper analyzes the causes of the pollution of Hou river in the wet season.Based on " clean-up shunt" management concept,this paper puts forward the engineering measures to intercept groundwater in the upstream of pollution source and intercepting drainage together with drainage engineering section automatically lift pump station between the pollution source and Longjing Wan big spring to clean the surface of the water body and reduce the pollution of water Longjing Wan big spring to reach the effect that sewage is not discharged to Hou River in the wet period.After the completion of the tunnel drainage,the water interception capacity of the tunnel was measured and analyzed,and 29.7% of the flood peak flow was effectively reduced in the tunnel.It is expected that after the completion of the treatment project,the cumulative reduction of peak discharge from the treatment project will account for 48.2%.The environmental control of Hou River in Fuquan can provide reference for similar water pollution treatment.