Conducting investigations and analysis on the sources of pollution and the amount of pollutants entering the river is an important part of water pollution prevention and water resource protection task

and an important lever for managing the red line for limiting pollution reception in water functional areas. Non point source pollution is the main water environmental problem faced by the Kashgar River Basin. This article estimates the inflow and spatial distribution of various non point source pollutants in the basin using source intensity coefficient method

providing technical support for the scientific formulation of water pollution prevention and control measures and treatment plans. The results show that the application of agricultural fertilizers is the main non-point source pollution source in the watershed

accounting for about 90% of the pollution load in the watershed. Spatially

the KirzlRiver

GhezRiver

and Kashgar region are the main areas for the distribution of non-point source pollution loads in the watershed.