[1]State Key Laboratory of Hydraulics and Mountain River Engineering;
Sichuan University;
Chengdu 610065;
China;
[2]Changjiang Water Resources Protection Institute;
Changjiang Water Resources Commission;
Wuhan 430051;
China;
[2]Changjiang Water Resources Protection Institute;
Changjiang Water Resources Commission;
Wuhan 430051;
China;
[1]State Key Laboratory of Hydraulics and Mountain River Engineering;
Sichuan University;
Chengdu 610065;
China;
Danjiangkou Reservoir; Non-point source pollution; Base flow separation; Digital filtering method (DFM); Flux method;