LI Man,QU Zhi,LIU Pei-yong,et al.Characteristics of Urban Road Runoff Pollution in Northern City Based on Artificial Rainfall Test[J].China Water & Wastewater,2020,36(21 21):110-114.
Characteristics of Urban Road Runoff Pollution in Northern City Based on Artificial Rainfall Test
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
21 21
Page:
110-114
Column:
Date of publication:
2020-11-01
- Keywords:
- road runoff pollution; non-point source pollution control; artificial rainfall test; sponge city
- Abstract:
- In order to understand the characteristics of typical urban road underlying surface runoff pollution in Qian’an City, the road runoff pollution with return period of 1, 2 and 3 years was monitored by artificial rainfall test,and discharge characteristics, event mean concentration (EMC) and correlation of SS, NH3-N, TN, COD and TP in runoff were analyzed. Concentration of various runoff pollutants peaked when the designed rainfall was 4-5 mm. After that, the concentration gradually decreased and stabilized when the rainfall was 10-15 mm,indicating that the first 15 mm rainfall was the best stage for runoff pollution treatment in Qian’an City. EMCs of SS, NH3-N, TN, COD and TP in the road runoff were 36-39 mg/L, 0.47-0.61 mg/L, 4.71-9.51 mg/L, 43-54 mg/L and 0.18-0.23 mg/L, respectively. Among them, the concentrations of COD and TN exceeded the class Ⅴ standard limitation specified in Environmental Quality Standards for Surface Water(GB 3838-2002), which were the main road runoff pollutants. The concentration of SS had a good positive correction with the concentrations of NH3-N, TN, COD and TP. Based on this, SS was selected to be the typical road runoff pollutant in Qian’an City, and the relationship between control ratio of SS in runoff and designed rainfall was analyzed.The results could provide reference for the determination of designed rainfall in the process of road sponge city construction based on water environment pollution control.
Last Update:
2020-11-01