Validation of IAP94 land surface model over the Huaihe River basin with HUBEX field experiment data

Off-line experiments have been conducted with IAP94 land surface model on d ifferent surface types (cropland, forest and paddy field) in different seas ons (spring, summer and autumn) over the Huaihe River basin. The simulated energy fluxes and canopy temperature by IAP94 agree quite well with the obs ervations, simulation results also show that IAP94 can successfully simulat e the tendency of total soil water content variation. The comparison;result s between simulation and observation indicate that strong evaporation at th e paddy field in summer should be paid more attention to within the land su rface models, and model's performance leads to the conclusion that IAP94 is capable of reproducing the main physical mechanisms governing the land-sur face processes in the East Asian semi-humid monsoon region.