关键词: Topmodel, 黑河, 出山径流, DEM分辨率

Abstract: Topmodel,a conceptual model with distributed parameters,is used worldwide while rarely in China.The model requires that the basin DEM resolution is less than 50 m×50 m,and the model time step is several hours.Thus,the Topmodel has been only used in little basins.In order to use Topmodel to simulate the runoff from mountainous basin of Heihe mainstream which has a drainage area of 10 009 km²,the authors decrease the DEM resolution to 1 500 m×1 500 m.The time step is also increased to day and month respectively.The daily model results are not too bad,especially for runoff in autumn and winter.The monthly model results are relatively well.The main reasons for that the simulating results are not very well are the rough DEM resolution and the too big catchment area.The simulated results indict that the model should be used widely in China,and the model capacity should be extrapolated.

Key words: Topmodel, Heihe River, runoff from mountainous outlet, DEM resolution