Rubber Dam In The River Water Self-purification Of Applied Research

According to the characteristics of the seasonal river in northern China. In order to achieve the dual purpose of river ecological restoration and water purification. The government had constructed the rubber dam in the river of the pollution control area of the south-to-north water diversion project. This paper analyzed the river's COD and the changes of ammonia nitrogen the rubber dam before and after built. So as to determined the rubber dam on the construction of river water quality improvement effectively.Before the construction of the rubber dam, the COD and ammonia nitrogen were 30-40 mg/L in this river. But after the construction of the rubber dam, the COD was 25 mg/L, and ammonia nitrogen could also meet the standard of three kinds of surface water. Because the hydraulic retention role of rubber dam enhanced the role of physical settlement, chemical adsorption and plant degradation. After the completion of the rubber dam in the second COD value successed rate increase apparently. Ammonia nitrogen value to standard throughout the year.From the above conclusions caned be seen, The construction of the rubber dam to satisfy the north of seasonal river ecological water use, restore river ecological system, enhance the role of physics, chemistry, organisms and plants. Improved the river self-purification.