Research On Basin Distributed Hydrological Model Improvement And Application

Research on simulation of natural watershed hydrological processes can help people understanding the watershed hydrological cycle process more clearly,so that can more effectively and reasonably planning and utilization of the water resources.In the article,Respectively in view of the natural basin water cycle process and the "natural-artificial" dual characteristics of basin water cycle process,using distributed hydrological model and distributed coupling model researched of basin water cycle process.To sum up,main results of study are listed as follows:(1)For the ice-snow melt water runoff process simulation,the paper selected SRM model for watershed hydrological process simulation on the basis of hydrological,meteorological and ice-snow cover datum of xinjiang Tashikuergan River Yieliehei hydrologic station control watershed.In view of the SRM model structural flaws,and according to the relationship of vapor pressure and evaporation,the paper adds the evaporation loss in the SRM model in the process of modeling,and using the improved SRM model build the distributed ice-snow melting runoff model.The simulation and test results show that the improved distributed SRM ice-snow melting runoff model can be used to the lack of runoff data watershed in the western alpine region.At the same time,the improved model can be used to analysis the ice-snow melting runoff response to the climate change in similar region;(2)For the rainfall runoff process simulation,the shaanxi qinling heihe gold basin reservoir watershed was as the research object,and based on the characteristics of the basin rainfall runoff and watershed hydrological simulation research situation,this paper choose TOPMODEL model for rainfall runoff process simulation in flood season.According to the structural characteristics of TOPMODEL model,the model of evaporation module,runoff module and bus module was improved.Through the simulation analysis shows that the improved TOPMODEL model can be used better to the study basin,and provides a feasible simulation method for humid,semi-humid and semi-arid region of rainfall runoff process simulation analysis;(3)In the basin of the water cycle having "natural and artificial " characteristic,the stone river reservoir control basin and downstream irrigation area in shaanxi province were as the research object,and according to the regional meteorological and hydrological data and remote sensing,irrigation channel engineering data,the distributed TOPMODEL model,water balance model,and channel unsteady flow simulation model were coupled to establish the regional distributed hydrological model,and the model consider the artificial side-branch water transport and distribution process.Through the study of regional hydrologic cycle simulation,show that the coupling distributed model can be better to simulate the process of river basin water cycle,and supply a certain guiding significance for regional water resources allocation and the safe operation of the project.