Study On Mountain Rivers Confluence Of Numerical Simulation Of Sediment

With the implementation of western development, the state has increased the upper Yangtze River and Wujiang River, Jialing River, Tuo River and Minjiang water resources development in the construction, in the tributaries upstream of the confluence of various water control construction, the water and sediment conditions significant change will occur by operation of hub junction of the flow channel of changes in structure and sediment movement, unsystematic; affected by the upstream hub operation, the confluence of the hydraulic characteristics of a variety of rapids and the deformation will be more erosion complex and may generate new to navigation Rapids, will further exacerbate the problem to navigation, running on the port will also be adversely affected. Therefore, the study tributaries upstream of the confluence of the construction of water control around the junction of waterways and harbors a variety of flow conditions and hydraulic characteristics of the change on the navigation conditions confluence of great significance.In the previous paper on the convergence of saliva sediment on the basis of research results, based on the project through - reach the confluence of the Yangtze and Tuo-site research and prototype observation data and in-depth analysis of existing research results, based on the orthogonalUnder the grid system of the plane curve D mathematical model to simulate the movement of river flow, simulation of water surface, the measured velocity distribution and natural values to a more satisfactory degree of agreement.Admiralty till the construction of upstream water control, the navigation conditions on the impact analysis showed that: the day after the completion of the upstream hub for flood regulation and the process of the navigation conditions on the Admiralty till little effect.