摘要：To achieve more reasonable and effective treatment of urban stormwater, researchers proposed theLow Impact Development (LID) method, which is regarded as a sustainable solution. Studies haveshown that the bio-retention system was effective in tackling urban runoff problems and was one ofthe most commonly used LID. In hydrologic modeling, DRAINMOD has a new application in bio-retentionsimulation. A model named Hydrologic Performance Tool (HyPer Tool) is proposed based on the outputof DRAINMOD simulations on various bio-retention designs. This paper utilized HyPer Tool to simulatethe bio-retention system in the urban road runoff in Xi’an, China with different rainfall conditions andcharacteristics. Meanwhile, this paper discussed and analysed the dynamic changes of pollutantsand impurities during bio-retention system runoff purification in the four typical designs of HyPer Toolbio-retention ponds so as to provide an objective evaluation on bio-retention – an urban rainfall-floodmanagement approach..
