降雨-径流过程中非点源污染物迁移过程分析

Analysis of Nonpoint Source Pollutant Transfer in Rainfall Runoff

以柴河流域示范工程区为研究对象,通过一次暴雨径流的污染物浓度数据来研究降雨-径流过程中非点源污染物浓度变化规律及污染物排放负荷量.研究结果表明,非点源污染物氮、磷浓度随降雨各时期的变化而变化,且污染物浓度变化趋势与降雨径流量的变化趋势基本相似,降雨过程示范工程区出口处总氮、总磷浓度及流量均高于示范工程区入口.

With the demonstration project district in the Chaihe basin as the research object,the authors studied the varying pattern of the nonpoint source pollutants and pollutant discharge load by using the pollutant concentration data measured in rainstorm runoff.The results show that the concentrations of non-point pollutants such as nitrogen and phosphorus vary with the change in rainfall at different stages,and the trend that the pollutant concentration changes is basically similar to the change in rainfall runoff.During the process of rainfall,the total nitrogen and phosphorus concentration and flow at the exit of the demonstration area are higher than those measured at its entrance.