Study on the Discharge Pollutant Load Characteristic of Disordered Drainage System in Rainy Day

According to the special drainage system in our country, being differ from the Separate and combined sewer system, there has defined a new drainage system - disordered drainage system(DDS). In the light of the representative DDS- Furongjiang drainage system, the discharge pollutant characteristic has been analyzed, the result indicates that there is the peak value phenomenon of the pollutant concentration and load, and it shows that the total pollution load is large also. Then in the paper, the source of the DDS´s pollutant is analyzed. Because the received water is all of a sudden increase and badly polluted by the DDS´s discharge water, for the sustainable improvement of the city water environment, the DDS is suggested to be key studied and controlled. The results of the DDS´s pollutant load in this paper provide a useful reference for the coming study.