Flood Forecasting And Error Analysis Of Nilki Reservoir

Flood disaster is one of the most serious natural disasters in the world,which has brought bad influence on people's production,life and social development.Flood forecasting is a very important non engineering measure of flood control and disaster reduction.Nilki reservoir is a controlled water control project on the main stream of Nenjiang River,and the underlying surface condition and rainfall distribution are very uneven.Therefore,the runoff conditions are very complex,not only by the river flow in the upper reaches of the role,but also affected by the factors of the downstream backwater backwater and other tributaries.In the traditional watershed hydrological model,the confluence of river network can not describe these factors in detail,which leads to the decrease of the flood forecast accuracy.To solve this problem,this paper takes control of Nilki reservoir basin as the research object,using the MIKE11 model of water resources and water environment of the Danish Institute of DHI MIKE series software,a coupling model of one-dimensional hydrodynamic control Nilki Basin Rainfall Runoff Model and HD NAM model.The flow model considering the physical mechanism of the channel,on the basis of solving Saint Venant equations to get the flow and water level in different sections of the river,as far as possible to reflect the real situation of watershed;application of basin rainfall stations,hydrological stations measured flow,water level and rainfall data for parameter calibration and model validation.The simulation results show that the coupling model of HD module and NAM module of the MIKE11 model can simulate the control of Nilki,river runoff,prediction of hydrological data provide technical support for flood control scheduling of Nilki reservoir.