The Construction And Application Of The Distributed Model Based On Excess Storage-excess Infiltration In Semi-arid And Semi-humid Region

Flood disaster is a high probability of occurrence,wide and strong destructive power of natural disasters.Flood disasters not only cause great losses of human life and property,but also did a lot of harm to the human survival environment.Flood forecast to flood dispatching and flood control and emergency department provides scientific decision support.Distributed hydrological model is an important means of flood forecast,and distributed hydrological model can accurately with local underlying surface conditions and meteorological conditions,the distributed hydrological model is the focus and direction of the current hydrological subject in the research,and it is also the difiiculty and hotspot in research.In this paper,by constructing suitable for ancient county,the "double above flow of hydrologic control of river basin flood forecasting model of distributed hydrological models,this model through aultra compatible runoff yield model,Nash unit line method and root method based on the theory of mas Beijing as a case study of the ancient county small watershed flood events of the ancient county" hydrologic simulation validation.By building the model of experience and the results of the simulation model of comparing with the results of analysis,some conclusions are drawn through the results of the simulation analysis of the distributed hydrological model is applicable to the region.(1)In the calculation of this paper,firstly analysis the ancient county "hydrological station control watershed underlying surface conditions and meteorological data,such as rainfall runoff and ARCGIS software is utilized to extract the region of DEM data,as well as for the extraction of river water system,through the analysis results are in front of the watershed division,for the basin is divided into a 11 by ARCGIS software.(2)To a super permeability-super are compatible with the premise of runoff yield model and based on the DEM data,build a suitable semi-arid sub-humid regions Distributed hydrological forecast model.In this paper,the ancient county "hydrological station control river basin as an example of the model simulation validation.Using Arcmap weights of the basin,and then the calculation of surface rainfall,the surface precipitation of the through the calculation of surface rainfall data,experiment of the proceeds of the evaporation data and interpolation calculation flow data after the input of the model,it is concluded that the parameters of the model,through the selected 10 sessions of flood simulation,precision in the permitted range,build the model is suitable for the region.(3)Of the 10 flood simulation through the model validation and empirical model for the same 10 flood simulation analysis and comparison,the double super model building simulation model accuracy of simulation precision is higher than the experience,has to build distributed hydrological model can provide certain guiding flood forecast for the region,and for empirical model can provide reference for flood forecasting in the region.