雨水调蓄池改善河道水环境质量的效应分析

Analysis on Effect of Rainwater Storage Tank to Improve Water Environment Quality of River

研究了建设雨水调蓄池对上海市桃浦河水质的改善效应,模拟结果显示：（1）雨水调蓄池改善河道水质的效应随着其容积建造标准的提高而增大;（2）设计容积6 000 m3和12 000 m3雨水调蓄池运行时,在平均流速0.15 m/s的水动力条件下,对下游550 m河道断面瞬时COD浓度降低范围分别为27-101 mg/L和47-180 mg/L;（3）在上述模拟条件下,雨水调蓄池运行时,可使下游河道550 m河道断面溢流事件时全过程的COD通量浓度分别下降57 mg/L和88 mg/L。

The article studies the effect of rainwater storage tank to improve the water quality of Taopu River in Shanghai. The simulation result shows that the effect of rainwater storage tank to improve the river water quality is increased with the upgrading of its volume building standard; the instantaneous COD concentration ranges of the river at 550 m downstream section will be reduced from 27 mg/L to 101 mg/L and 47 mg/L to180 mg/L respectively when the design volumes of 6 000-m3 and 12 000-m3 rainwater storage tanks are operated under the hydrodynamic condition of average velocity 0.15 m/s; the flux COD concentration of the whole process at 550 m downstream section in the overflow event can be reduced by 57 mg/L and 88 mg/L when the rainwater storage tank is operated under the above simulation condition.