Water Resources Effects Of Bending River Dike Reconstruction Project In Liuyang River Chaozheng Embankment

With the transformation of urban river,the river rational development and utilization projects is increasing,especially especially in the river bend and River tributaries,the water situation is very complex.Through the study of the influence of the river channel reconstruction on the water level,flow field and scour and silt of the bend reach,it is very significant to determine the optimized channel reconstruction scheme.The Chaozheng protective embankments of Sharp section in Liuyang River as an example,additive effect of the comprehensive consideration of Changsha hub operation the Xiangjiang River water level up lift of Liuyang River backwater and The Chaozheng protective embankments of Liuyang Riverdifferent frequency flood,hydrological changes in the upstream section of straight line,bending section,the lower reaches of straight line segments,changes in velocity and scour and silting situation of simulation,the main research contents are as follows:(1)to construct the model of the study area,the calculation model is set up and verified(including the rate of the water surface and the verification and the rate of the cross section flow rate).(2)using the Mike water flow and sediment mathematical model to study the preliminary design scheme of the water flow of the river,the water level,flow field and the scour and deposition conditions were obtained.(3)aiming at the problems existing in the initial design scheme,the optimal design scheme is then carried out to simulate the water level,the flow field and the change of the scour and deposition of the water level,the flow field and the change of the.The seepage and stability of the embankment are analyzed by using the Seep/w and Slope/w modules of the Geo Studio and the module which are used in the design of geological engineering.The regional research current situation analysis and embankment stability numerical simulation study,calculation results show that: for the river bend,although expand the transformation of the bending section,the convex flow velocity increases may still scouring exists,concave part will accumulate,in the neighbor bending the downstream section of theconcave bank local may also produce backwater;to optimize the dike,as far as possible so that after the transformation of the flow condition is consistent with the original river flow conditions;toward The Chaozheng protective embankments of Liuyang Riveris Huan in the study area,The Chaozheng protective embankments of Liuyang River100 years once(once in200 years aside)design flood control standard,dike safety and stability.The results of this study can not only towards The Chaozheng protective embankments of Liuyang Riveris Huan River Bend embankment reconstruction project planning and design to provide guidance,and can provide reference for similar projects.