简介:-BasedonthefeasibilitystudyofdevelopingthenavigationresourcesoftheGuanheRiverandthemodeltestresultsofthemouthbarregulation,thispaperpresentssomebasicprinciplesfortheregulationofthechannelonthemouthbar,forinstance,thedirectionofnavigationchannelshouldbeidenticalwiththatoftheebbtidecurrentandthemainwaves,andperpendiculartothebathymetriccontours.Theprinciplesforregulatingmouthbarsarealsodiscussedinthispaper.
简介:暴露于波浪的跨岸的沉积运输率为沿海的形态学,象防波堤那样的海洋的结构的设计,突堤,防波提等等,和由于onoff岸沉积交通的沿海的侵蚀和生长的预防是很重要的。在现在的学习,跨岸的沉积运输的实验与1/8,1/10和1/15的起始的沙滩斜坡在一条实验室波浪隧道被执行。由使用常规波浪,不同深海的波浪险峻由一个踏脚板类型波浪生成器产生了,沙滩的几何特征在影响开关岸沉积运输的暴风雨条件和参数下面介绍与d50=0.25的中等直径为沙滩材料被调查,0.32,0.45,0.62和0.80公里。近海酒吧几何特征是从海岸线的水平距离到酒吧开始(Xb),冠(Xt),并且(Xs)结束指,从酒吧冠的深度到静止的水水平(ht),并且酒吧体积(V酒吧)。当时,试验性的结果显示了那深海的险峻(H0/L0)增加,到海滨的网运动增加了。与增加的波浪险峻,移动附此从静止的水拓宽垂直距离的酒吧铺平到酒吧开始(Xb),冠(Xt)并且结束(Xs)从海岸的点和水平距离排队到酒吧开始,冠和结束的点增加了。它也从试验性的结果被显示出来自开始并且结束点到海岸线的酒吧的水平距离与沙滩斜坡的减少增加了。从这研究获得的试验性的结果与以前的试验性的工作相比并且发现具有象试验性的大小的一样的大小并且跟随期望的基本趋势。
简介:PointbarsarewelldevelopedontheYellowRiverdelta,amongwhichtheShengliIpointbaristhemosttypical.Thepointbar,beingabout4kminlengthandseveraltenstomorethan100metersinwidth,islocatedonthesouthsideoftheShengliBridgeinKenliCounty,Dongying,Shandong.Itisatypicalfine-grainedpointbarwithsilt,whichispredominant,someclayandminorplantdebrisandclayboulders.TheShengliIpointbarhascomplicated3-Dstructures.Firstly,inaplaneview,itcomprisesmainlyeightsedimentaryunits,baredge,barridge,barplatform,barplain,barchannel,bargully,barpondandbarbay,developingsidebysideandsuperimposedonebyoneinacomplexway.Secondly,itsverticalstructuresareverycomplexduetothepartialsuperimpositionofthe8sedimentaryunits.Besideshydatogenesis,veryintensivewinderosion,eolian,iceandmeltwateractionsarealsovisibleontheShengliIpointbar.Thecomplexformismadeevenmorecomplicatedbecauseoftheaboveco-actions.