Study On Waterway Regulation Progtam Of Xinzhou Shoal In Anqing Waterway Of Yangzi River

The Anqing waterway is about 23 km from the estuary of Anhui river to the estuary of Qianjiang river.In history,the pattern of the river potential in Anqing river has changed dramatically and the main branch is frequently heterotopic.The channel condition of left inlet is unstable,which is affected by the development of low beach and middle branch in the head of Xinzhou.Although The implementation of the early remediation project has limited the development of the new branch,the unprotected low beach area of Xinzhou is still being washed away and there is still a trend of development in the middle branch which push the inlet of the left branch to a wide and shallow direction that is not conducive to the stability of the channel conditions.Therefore,in order to further stabilize the channel condition,it is necessary to carry out waterway regulation on Anqing waterway on the basis of the previous project.This subject is based on collecting and analyzing the natural condition of river channel and riverbed evolution,establish a 2-D water sand mathematical model of Anqing river including Anqing channel,Taizi channel and Guichi water channel,using the latest measured hydrological and topographic data to validate the parameters of the model,using the model results to carry out comprehensive and systematic research on the characteristics of flow distribution at different flow levels in the engineering river,the evolution trend of the river and the regulation plan of this channel,etc.,which provide technical support for the feasibility study of the current project of Anqing waterway regulation project.Respectively by using the model aiming at the projects of the limited current in Anqing and the low beach of the new continent,a series of experimental study program of the tentative numerical simulation of single and composite projects are carried out.Considering project effect and external constraints and other factors,the recommended plan for the waterway regulation project of Anqing waterway is proposed for this issue.Based on the understanding of the evolution of the Anqing Channel waterway,the preliminary waterway regulation project,and the external environment,according to the basic theory of waterway regulation and combining with past practice,the Anqing waterway improvement principles,rectification ideas,and the six individual projects for the restriction of the Zhongyu River,Chau Head guards five single-items and four different combinations were proposed.With the model to compare the single scheme and the combined scheme of the middle stream restriction in Anqing and the head guarding project of Xinzhou respectively,a simulation and comparison of the single scheme and the comprehensive scheme of the midstream flood control and Xinzhou head guarding in the Anqing Waterway Regulation Project was recommended..The research results of this paper have reference value for the design of Anqing Waterway Regulation Project.