基于TANK和LPM模型的华南山丘小流域洪水模拟研究

Research on Flood Simulation of Small Watersheds in the Hilly Area of South China Based on TANK and LPM Model

我国山丘地区面积占国土面积约67%,为探索山丘小流域洪水预报方法,提高山丘小流域洪水预报精度,针对华南山丘小流域采用TANK模型和LPM模型进行洪水模拟研究,利用V型薄壁堰测流方法得到流域实测流量,以实测流量数据对模型进行率定和验证,采用洪峰、洪量、峰现时间3个指标进行模拟效果评价,验证期合格率均在85%以上,达到GB/T 22482-2008《水文情报预报规范》中评定精度的甲等,说明TANK模型和LPM模型对小流域洪水预报具有较好的适用性。

Thehilly area of China accounts for about 67%of the national territory.In order to explore flood forecasting methods for hilly and small watersheds and improve the accuracy of flood forecasting,this paper uses TANK model and LPM model for flood simulation research in hilly and small watersheds in South China.The measured flow of the watershed was obtained using the V-shaped thin-walled weir flow measurement method.The model was calibrated and validated using the measured flow data,and three indicators,namely flood peak,flood volume,and peak occurrence time,were used to evaluate the simulation effect.The qualification rate during the validation period is above 85%,reaching the Grade A evaluation accuracy in the GB/T 22482-2008"Hydrological Information Forecast Specification".It indicates that the TANK model and LPM model have good applicability for flood forecasting in small watersheds.