The Response of the HydroGeoSphere Model to Alternative Spatial Precipitation Simulation Methods

This paper presents the simulation results obtained from a physically based surface-subsurface hydrological model in 5730 km2 watershed and runoff response of models for three methods used to generate spatial precipitation distribution: Thiessen polygons (TP), Co-Kriging (CK) interpolation simulated annealing (SA). The HydroGeoSphere is employed simulate rainfall-runoff process two watersheds. For large event, patterns using SA appear be more realistic than those TP CK method. In large-scale watershed, demonstrate that when forced by data, it fails reproduce timing, intensity, or peak streamflow values. On other hand, are consistent with measured streamflows. medium-scale show similar compared values driven all estimate precipitation, although case slightly better cases. analytical could provide valuable counterpart existing climate-based drought indices comparing multiple simulating land surface runoff.