Analysis Of The Course Of Sedimentation In Lower Approach Of The Floodgate And Research Of The Project Of Bring Into The Tidewater And Eroding The Sedimentation

For resolving the problem with admission of water and abstraction of waterlog of coastland, each marine estuarine has built the floodgate. The purpose is to protect against the tide and resist typhoon, withstand salt-water and store up freshwater Keep land salt alkali from turning, drain waterlog and discharge the flood, Sometimes, the ship lock has still been set up at the same time for the sake of the easy to navigation. But, sedimentation widely occurred in lower approach of the floodgate, so as to affect the normal application and navigation of the floodgate. Therefore, analyzing and studying the Mechanism of silting up after setting up the floodgate into sea river mouth , to predict building the floodgate into sea river mouth whether feasible, rational, and the correction of river after setting up the floodgate, and adopt the measure of reducing and preventing the sedimentation, will have the very important meaning.This text is take the sedimentation in lower approach of the WangGang floodgate in DaFeng city of Jiangsu province as an example. In the foundation of the research result that there has been, combine hydrological record and analytical record of WangGang floodgate, make use of two-dimensional finite element method to analysis and study unsteady flow in lower approach of the WangGang floodgate, and find out the course of sedimentation in lower approach of the WangGang floodgate, the result that study will offer gist for the expansion of sedimentation mitigation workFor alleviating the sedimentation in lower approach of the floodgate, this text raise project of bring into the tidewater and eroding the sedimentation, and make use of two-dimensional mathematical model to research the feasibility of the project of bring into the tidewater and eroding the sedimentation. The result indicated that bring into the tidewater and eroding the sedimentation is effective to alleviate the sedimentation in downriver leading-river of the floodgate. However, bring into the tidewater and eroding the sedimentation will bring the problem with the sedimentation in upper approach of the floodgate and brine inbreak, take into account the seriousness of the problem, this text did analysis and study.