文档介绍：EFFECTANALYSISOFFLOATBRIDGEONRIVERREGIMECHANGEANDFLOODCONTROL ONWANDERINGREACHESOFTHEYELLOWRIVER 黄河下游游荡性河段浮桥建设对河势及防洪的影响分析李永强刘筠张靖LiYongqiangLiuYunZhangJingReconnaissanceDesignandResearchInstituteofYellowRiverHenanAdministrationBureauBackgroundofthestudy 项目研究背景 封开浮桥简介 浮桥建设对水流条件影响的分析 浮桥建设对河势的可能影响分析 结论和建议OutlineofthePresentationMoreandmorefloatbridgeshavingbeenbuiltonthelowerYellowRiverduetoEconomicdevelopmentSofar,53bridgesinShandongProvinceSince2000,,andthepossibleeffectonfloodcontrolcanprovidepositiveandscientificbasisforthefuturefloatbridgeconstructionRiverregimeevolutionofDagongtowang’-,andthemainflowis4mdeepinaverageThefloatbridgeis880mlongintotalandrunsoverthenewfloodplainandthemainchannel,,(500m3/s,1000m3/s,2000m3/sand4000m3/s).(m3/s)RiverWidthB(m)AverageWaterDepthH(m)AverageFlowVelocitybeforeBridgeBuildingV(m/sBackwaterHeightduetobearingboat(m)Waterrisingbeforethebearingboat(m)BackwaterExtent(m)Backwaterheightnearth