Parameter calibration and applicability analysis of SWAT model in Hulan River basin based on different algorithms
In order to discuss the applicability of SWAT model in the high-cold basin,a tributaries of Songhua River Hulan River basin is taken,as an example,measured hydrological data of Hulan River Lanxi hydrological Station for 11 years from 2008 to 2018 is selected,SWAT model on a monthly scale is constructy,and PSO algorithm and SUFI-2 algorithm are used respectively to calibrate the model and conduct runoff simulation.Determination coefficient(R2)and Nash efficiency coefficient(NSE)were used to evaluate the applicability of SWAT model.The results show that:The R2 and NSE of the PSO algorithm in the rate interval and validation period are 0.56,0.54 and 0.64 and 0.59,respectively;the R2 and NSE of the SUFI-2 algorithm in the rate interval and validation period are 0.74,0.74 and 0.71 and 0.70,respectively.Both algorithms meet the accuracy requirements that the R2 and NSE are greater than 0.5.In contrast,SUFI-2 algorithm is more suitable for this study area and can better simulate the runoff process of Hulan River basin.
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