武汉市城区降雨径流污染负荷对受纳水体的贡献

通过连续3年对武汉市汉阳城区降雨径流污染的监测研究,考察了降雨径流污染对受纳水体的贡献.结果表明,城市降雨径流向受纳水体输入的污染负荷占有很大的比例,是引起城市水环境质量恶化的主要原因之一.在城市集水区尺度上,3个没有实施截污工程的雨、污合流制集水区降雨径流输出的TSS、COD、TN和TP分别占集水区总污染负荷的59.4%、26.3%、11.2%和10.1%.采取截流措施,控制初期径流污染是合流制城区降雨径流污染控制的关键.

Contribution of pollution load of storm runoff in urban areas of Hanyang, Wuhan City on the receiving water

Water quality and quantity of urban storm runoff and sewage were monitored to identify the contribution of storm runoff pollution load to the receiving waters in Wuhan City from 2003 to 2005. Storm runoff from urban area carried large amount of pollutants into the receiving waters, which was an important cause of surface water quality deterioration. For the three monitored urban catchments with combined sewer system, the storm runoff produced 59.4% of the total suspended solids (TSS), 26.3% of the chemical oxygen demand (COD), 11.2% of the total nitrogen (TN), and 10.1% of the total phosphorus (TP). Adopting intercepting measure and controlling first flush pollution was the key of controlling storm runoff pollution from urban areas.