Simulation of VIC Hydrologic Model During 2006 Flood Season
The runoff and water content in soil and the discharge of hydrologic station in China during the flood season of 2006 are simulated by using the VIC (Variable I nfiltration Capacity) hydrologic model, with emphasis on the water logging disas ter produced by a heavy rainfall case from 28 June to 5 July 2006 in the valley of Huaihe River. Performance of the model in simulating the discharge over the H uaihe River basin is examined in different horizontal resolutions, e.g., coarse mesh and fine mesh（0.5°×0.5° and 0.1°×0.1°）. Results show that patterns of simulated runoff and soil humidity are consistent with that of rainfall and t he model output for soil humidity is reasonable for reference. Temporal variation in the accumulated rainfall, runoff and soil humid ity can be used to monitor the water logging disaster. VIC land surface model and conflux m odel are able to reproduce the trend of realistic discharge in some degree. Disc harge simulation is sensitive to rainfall and is more realistic in the case of f ine mesh than in the case of coarse mesh. Model error likely comes from the unre asonable boundary of the drainage basin, calibration of parameters and atmospher ic forcing data.