A physically distributed hydrological model TETIS was used to simulate runoff for Wuyuer River basin in the black soil region of Northeast China. SCE-UA algorithm was combined with manual parameter adjustment to calibrate and validate the model with daily runoff dataset from 1971 to 1987. The basin water balance was also analyzed with model simulation. Results showed that both the Nash-Sutcliffe efficiency coefficient(ENS) and the determination coefficient (R2) were more than 0.7 during the calibration and validation periods, and volume errors of water balance were no more than 10%. Evapotranspiration was the main output of the basin water resource and surface runoff was the main part of the river discharge. Runoff discharge varied within a year, being the most in summer and the least in winter. Combined with model evaluation index and actual geography environment in the basin, it can be suggested that the TETIS model shows good applicability in the black soil region of Northeast China. The model could be used in other similar basins with similar characteristics. This study can provide scientific basis for sediment simulation and for evaluations of climate and land use changes.

TETIS model; Northeast China; Wuyuer River basin; runoff simulation