基于RIBS模型的无资料流域洪水模拟研究OA

Distributed hydrological models are widely used in flood forecasting.The RIBS model,developed based on the variable source area concept,has a solid physical basis and fully accounts for the influence of underlying surface heterogeneity on runoff gen eration,thus demonstrating strong application potential.However,current applications of the model still rely heavily on parameter calibra tion,which weakens the consideration of spatial variability.In addition,methods and experience for parameter determination in ungauged catchments remain limited.Therefore,this study,based on the RIBS model,explores approaches for parameter determination and its application in ungauged basins.Quantitative relationships between model parameters and watershed topographic and geomorphological characteristics are established,and selected catchments are used for application studies.The results indicate that the proposed quantita tive relationships outperform remote sensing-based methods in determining surface saturated hydraulic conductivity,and the construct ed model achieves relatively high simulation accuracy in ungauged catchments.The findings provide useful references for flood forecast ing applications.