[Off-line control of runoff pollution by filtering ditch-pond system in urban tourist areas].
An off-line filtering ditch-pond system for controlling storm runoff pollution in urban tourist areas was developed, which could retain the first flush effectively, resulting in the decrease of pollutant concentration and suspended solid average grain size, and the improvement of pollutant retention in runoff. This system could be an effective treatment system for storm runoff pollution, particularly for the scarcity of available land use in urban areas. In 2005, the yearly retention rates of TSS, COD, TN and TP were 86.4%, 85.5%, 83.9% and 82.9%, and during a storm event on June 26, the retention rates of runoff volume, TSS, COD, TN and TP were 67.9%, 97.0%, 89.2%, 94.9% and 96.2%, respectively. This system could also retain most of the suspended solids in runoff.
Chen
Qing-Feng
QF
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. chensdcn@163.com
Shan
Bao-Qing
BQ
Yin
Cheng-Qing
CQ
Hu
Cheng-Xiao
CX
D002681:China; D002947:Cities; D005374:Filtration / Q000295:instrumentation; D006801:Humans; D011891:Rain; D014195:Travel; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014876:Water Pollution / Q000032:analysis / Q000517:prevention & control*
D014874:Water Pollutants, Chemical