The Research Of Matchmatical Model In Baima Complex Beach Channel Under The Influnce Of Unsteady Flow Of Yinpan And Three Gorges Reservoir

Wujiang has been located in the downstream of yinpan hub. it suffers jacking of backwater of sanxia, the daily regulation of upstream hub will make the downstream channel became so complex, even take difficult to maintain the channel. so this text take the channel to research with numerical simulation method. this paper analyzes the influence of the downstream navigation condition on condition of daily regulation, and provide reference to engineering design.This paper analyzes the research status and development trend of the mathematical model, based on the finite volume method, one-dimensional unsteady flow mathematical model is created, and will be applied to the white horse to wujiang reach of the river, then calculate and analyse the influence of yinpan of the long reach on condition to the daily regulations. At the same time, based on the finite volume method, two-dimensional unsteady flow mathematical models are created, use the calculation of1-D mathematical model as the two-dimensional boundary conditions, the influence of the unsteady flow to the white horse complex beach rive is discussed. Summarized up, the researches of the paper are:(1)Establish the one-dimensional mathematical model and test itBased on river flow numerical calculation of the equations of motion format, boundary conditions and calculation method, a one-dimensional flow mathematical model is established, the water flow movement and riverbed deformation is simulated.(2) Establish a two-dimensional mathematical model and test itChoose typical section, establish of two-dimensional unsteady flow mathematical simulation model to simulate water flow movement and river plate deformation. in view of the mountainous rivers, for accurate simulation the river boundary conditions, the triangle mesh is used to. based on the finite volume method of numerical computation format and boundary conditions to calculation and simulation river water level changes etc. Then analyse its’ impacts.(3) In addition, The paper also calculates the release of three gorges dam unsteady flow and analys its’ effects.