城市地表污染物累积模型研究

城市地表污染物为城市面源污染的重要来源,科学认识和计算地表污染物是有效控制城市面源污染的关键。从2006年3月开始,选择镇江具有代表性的土地使用类型实测城市地表污染物,研究城市地表污染物累积变化规律。研究结果表明：地表污染物随着晴天时间的增长逐渐趋于上限值并呈周期性变化,根据＂贮存-输入-输出＂平衡原理,引入污染物输入速度系数和去除速度系数,建立地表污染物累积模型,通过与实测数据拟合和其他模型对比,模型计算精度较高,计算结果可作为城市地表污染物冲刷模型的输入,从而为城市降雨径流污染的控制和治理提供科学依据。

Modeling the Buildup of Pollutants on Urban Different Land Use Types

Urban surface pollutant is now recognized as a major source of urban non-point pollution,thus,it is a key problem to scientifically understand and compute surface pollutants.In order to obtain the build–up law,starting in May,2006,a study was conducted to measure surface pollutants from representative land uses types in Zhenjiang,Jiangsu Province.It is shown that surface pollutants increase to the maximum value gradually and change with the periodic variation.Based on the storage-input-output balance principle,the input speed coefficient and removal rate coefficient are introduced to establish the build-up model of surface pollutants.By fitting with the measured data and comparing with other models,the precision of the model is accurate,and the calculated results can be used as the input of the wash-off model,which provides the scientific basis for non-point source pollution control and management.