A Comparative Study of Different Hydrological Model and their Application in Little River Catchment

Sacramento, SimHyd and Tank model were selected and their structure, principles and characteristics were briefly described. Then by taking Little River Catchment in Georgia, USA as an example, the rainfall-runoff process was simulated by using the Rainfall Runoff Library. The results showed that: Nash-Sutcliffe coefficient reached more than 80% and RE (relative error coefficient of the total runoff) of Sacramento model also meets the requirements. Considering the Sacramento model is the best one on the Nash-Sutcliffe coefficient, the model is selected as the optimal model of Little River Catchment in this study.As the catchment is located in the southeastern USA, with humid climate, and saturated storage-based runoff generation, which is similar to Chongqing region, it provides relatively good reference for Chongqing as well as the entire southwestern region.