Journal of East China Normal University(Natural Sc ›› 2008, Vol. 2008 ›› Issue (2): 41-47.

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Reduction functions of runoff contaminants by the urban greenbelt(Chinese)

YANG Qing-hai1,2，Lv Shu-hua1，LI Xiu-yan1，HUANG Min-sheng1,YANG Kai1   

  1. 1. Department of Environmental Science， East China Normal University， Shanghai200062， China; 2. Department of City Environment, Eastern Liaoning University, Dandong118003, China
  • Received:2007-01-09 Revised:2007-03-09 Online:2008-03-25 Published:2008-03-25
  • Contact: LI Xiu-yan

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Abstract: In this paper,an artificial greenbelt and a lab-scale rainfall device were used to study the pollutant removal mechanisms of stromwater runoff through urban greenbelt.The results showed that，it was the cooperation of biological and abiological actions that caused the reduction of runoff contaminants. The average removal efficiencies of COD,NH4+-N,NO3--N,TN and TP were 41.3％,44.1％,38.5％,38.2% and 39.0％ respectively. Soil adsorption actions play the most important role during the rainfall,and microbial degradation mainly operates from the 5th day to the 8th day after rainfall. About in two weeks,COD,NH4+-N,NO3--N,TN and TP were basically removed and the soil were restored for next rainfall.

Key words: rainwater, runoff contaminants, reduction, urban greenbelt, rainwater, runoff contaminants, reduction

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