This study employs an enhanced output coefficient method that takes into account five factors to estimate the total non-point source pollution entering the river across four quarters and each township in the Daluxi Basin,based on monthly rainfall data from 2022.This provides a scientific basis for local governments to implement ecological and environmental protection measures in the basin.The results revealed the highest loads in Quarter 1(March-May)and the lowest in Quarter 3(September-November).The annual loads were 188.53 tons for TN,13.83 tons for TP,and 1 220.95 tons for COD.These loads were primarily distributed in Baihe,Zhutuo,and Xianlong towns,with TN and TP loads mainly originating from surface runoff and COD from livestock breeding.The estimates were within a 15％error margin compared to monitoring data.
维普
万方数据