Study on Hydrological Simulation of Gan River Based on SWAT-X Model

摘要

Hydrological simulation is the basis of water resources management and utilization. In this study, soil and water assessment tool (SWAT) model was applied to Gan River Basin for hydrological simulation on ArcView3.3 platform. The basic database of Gan River Basin was built using ArcGis9.2. Based on the LH-OAT parameter sensitivity analysis, the sensitive parameters of runoff were identified, including CN2, Gwqmn, rchrg_dp, ESCO, sol_z, GW_revap, S0L_AWC, sol_k, canmx and Alpha_BF, and then model parameters related to runoff were calibrated and validated using data observed in 20 hydrological stations during 2001-2008. The simulation showed that the simulated values were reasonably comparable to the observed data (Re < 20%, R2 > 0.7 and Nash-suttcliffe > 0.7), suggesting the validity of SWAT model in Gan River Basin.