基于InfoWorks ICM模型的径流污染影响因素研究

Research on the Factors Influencing Runoff Pollution Based on InfoWorks ICM Model

径流污染是造成城市水体黑臭的主要原因之一。为更好治理城市水体,利用InfoWorks ICM模型研究九江市的雨水径流污染影响因素,分析降雨前晴天天数、用地类型及降雨强度。结果表明:随着降雨前晴天天数增加,CODcr峰值浓度最高可达到600.1 mg/L;在人员活动密度高的地块,CODcr冲刷总量约为低人口活动密度地块的6倍(20.5~119.5 kg);随着降雨强度的加大,CODcr峰值浓度最高可达到5.28 kg/m^(3)。

Runoff pollution is one of the main causes of urban black-odor water bodies.To better treat urban water bodies,the InfoWorks ICM model is used to study the influencing factors of rainwater runoff pollution in Jiujiang,analyzing the number of sunny days before rainfall,land use type,and rainfall intensity.The results show that as the number of clear days before rainfall increases,the peak concentration of CODcr can reach up to 600.1 mg/L;in plots with high human activity density,the total amount of CODcr erosion is about 6 times that of plots with low population activity density(20.5~119.5 kg);with the increase of rainfall intensity,the peak concentration of CODcr can reach up to 5.28 kg/m^(3).