【摘要】 采用Johnes输出系数法以及SCS径流曲线和通用土壤流失方程估算法,对密云土门西沟小流域非点源污染负荷进行估算。结果表明,土门西沟小流域内附着态污染负荷的输出量是溶解态污染物输出量的3倍多,而附着态污染物输出量的大小主要由土壤侵蚀量决定,因此,控制流域内非点源污染的关键是加强该区的水土保持防治工作。Johnes输出系数法可用于观测资料比较缺乏的流域,而SCS径流曲线和通用土壤流失方程估算法除了可以估算总氮、总磷的含量外,还能分别估算出溶解态氮、磷和附着态氮、磷的量,使得防治非点源污染的措施可以更加有针对性。更多还原

【Abstract】 Johnes export coefficient method and the SCS runoff curve and the universal soil loss equation estimation the non-point source pollution load of Miyun Tumenxigou watershed.The results showed that Tumenxigou watershed pollution load within the attachment was dissolved pollutant output to 3 times the output,while the output of pollutants attached to state the size of the decision mainly by soil erosion,therefore,control of non-point source watershed,the key was to strengthen the area of pollution prevention and water conservation.Johnes export coefficient method could be used to compare the lack of observational data of watershed,and curves of SCS runoff and soil loss equation estimation method could be used to estimate the total nitrogen in addition to total phosphorus concentrations,but also estimate the dissolved nitrogen and phosphorus,respectively,and attached to state the amount of nitrogen and phosphorus,which makes non-point source pollution control measures can be more targeted.更多还原