Study On Distributed Hydrological Model For Yuqiao Reservoir Catchment Area

In recent years,with the development in the inner YuQiao Reservoir above the basin as well as social and economic watershed years of continuous drought in the original YuQiao Reservoir hydrological forecasting programs have not effectively reflect the situation on the underlying surface Watershed Rainfall-runoff of that larger deviations in the forecasting job,can not meet the needs of flood control and water resources deployment.To improve the accuracy of flood forecasting in reservoir basin YuQiao,before the subject based on the geographical and hydrometeorological characteristics in YuQiao Reservoir Basin,the use of Xin'anjiang model,based on grid Xin'anjiang Model GRID-XAJ historical watershed rainfall runoff simulation data and parameters calibration,development of flood forecasting project.The main research topics are:1,in YuQiao Reservoir catchment "Digital Valley" to generate and watershed information extraction.2,rainfall discrete space-based watershed DEM,divided according to the natural watershed basin unit area,determine a corresponding twelve sub-basin rainfall stations.3.The use of the water table of historical data,the quantitative relationship between changes in groundwater depth and water storage capacity.4,Digital Valley produced twelve sub-basins using historical flood data were used to model CASC2 D grid Xin'anjiang conducted parameter calibration.5,according to the division of the location within the reservoir basin hydrological station on the YuQiao,reservoir stations and twelve sub-basin,developed two kinds of reservoir flood forecasting plan for the YuQiao,and with the history of the flood simulation program were compared.This paper use a lot of historical flood data,for each partition using CASC2 D model grid Xin'anjiang model(GRID-XAJ)an historical rainfall runoff process simulation model parameters and calibration.From the simulation results point of view,the grid Xin'anjiang model more effectively reflect the impact of discrete changes in rainfall runoff basin underlying surface and spatial distribution of precipitation,to good effect.On this basis,this paper proposes two solutions to YuQiao flood forecast,flood forecast established storage solutions to YuQiao Reservoir basin-wide.