Abstract:

The distributed hydrological model has become the key issues of hydrology research based on the GIS and RS technology now.This paper introduces the VIC model and SWAT model from the interdisciplinary aspect of hydrology and meteorology.The two models were applied to Bailian River Valley of Hubei province to discuss its adaptability in flow simulation of the midsmall valley.Combined with DEM,vegetation and soil data,through model preprocessing,the framework of VIC model and SWAT model in Bailian river valley was established.The results show that the simulation difference of the VIC model and SWAT model is very small,the efficiency coefficient and correlation coefficient of the SWAT model are higher than that of the VIC model,and the annual simulation effect of the SWAT model is more average.But the simulation effect of the VIC model is better in 1995 and 1999 than in the other years;especially the flood simulation result is great distinct from the fact measure data in 2002,which lead to the whole lowness efficiency coefficient,the flood simulation result of the SWAT model approaches the actual data.The two distributed hydrological models can reflect the daily flow hydrological process of the basin on the whole and can be adaptable for the valley.

Key words: VIC model/SWAT model/mid/small valley/flow simulation