Fig. 6

Calibration and verification of the runoff rate of the model (the longitudinal coordinate indicates the runoff unit: m3/s). In this paper, the warm-up period of SWAT model was selected from 2008 to 2010, and the period from 2010 to 2014 was selected as the rate period. After parameter modification, the model was brought back into the model, and the accuracy of the model was verified again with the validation period from 2014 to 2016.