Flood Simulation And Comparison Of Different Hydrological Models In Hunhe River Basin

Flood disaster seriously restricts the economic and social development in the region.Timely and accurate flood forecasting can buy precious time for flood control and disaster reduction and minimize personnel and economic losses.Precipitation prediction error is an important source of the uncertainty of flood forecast,due to the application conditions of different hydrological models,at the same time,different basin has its peculiar hydrological conditions,so different hydrological models in different basins have different applicability,choose applicability better hydrological model for flood forecasting,can improve the accuracy of precipitation forecast,reduce the flood forecast error.In order to study the different hydrological models in hun river basin flood forecast precision and applicability,this paper takes the hun river basin before nankou sub basin as the research object,the selection of hun river basin before nankou river basin in 1968-1988 of the measured data,the application model of xin an river,API and the flood simulation model and double super model,simulation of different hydrological models accuracy.The main contents are as follows:Based on the measured data of nankou qianzi river basin in hunhe river basin of liaoning province from 1968 to 1988,the xin 'an river model is applied.API model and double super model of hun river basin before nankou river basin flood simulation,with the aid of SCE-UA watershed hydrological model parameter optimization algorithm,the choice of xin an river respectively model and API model and corresponding parameters of double super model in the study watershed,the comparison of different hydrological models flood simulation accuracy and precision of the highest hydrological models for applicability in the study of river basin flood forecasting best hydrological models.The results show that the flood simulation accuracy of xin 'an river model and API model is high,reaching grade b,while the flood simulation accuracy of double supermodel is low,not reaching grade c.During the verification period,the flood simulation accuracy of xin 'anjiang model and API model is high,reaching grade b;the simulation accuracy of double supermodels is general,but only grade c.Therefore,it can be seen that the xin 'an river model and API model have high accuracy and good applicability in the study of the basin flood simulation,and can be used for the study of short-term flood forecasting in the basin.The dual-supermodel has poor accuracy and poor applicability in the study of basinflood simulation,so it cannot be used in the study of short-term flood forecasting.At the same time,through the analysis of simulation errors,it can be seen that: the qualified rate of flood peak error simulated by xin 'anjiang model is higher than API model;the qualified rate of peak time error simulated by xin 'anjiang model is equal to API model;the qualified rate of certainty coefficient simulated by xin 'anjiang model is higher than APOI model;therefore,the simulation accuracy of xin 'anjiang model is slightly higher than API model.