规则波作用下沙质海岸岸滩演变规律三维试验研究  

Three-dimensional laboratory study on the law of sandy beach evolution under regular waves

作　　者：陆聪 王宁舸 孙林云[2] 张继生[1] LU Cong;WANG Ning-ge;SUN Lin-yun;ZHANG Ji-sheng(College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing,Jiangsu 210098,China;Nanjing Hydraulic Research Institute,State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering,Nanjing,Jiangsu 210029,China)

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098 [2]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029

出　　处：《中国港湾建设》2021年第6期35-40,共6页China Harbour Engineering

基　　金：国家重点研发计划(2018YFC0407503)。

摘　　要：为探究长时间序列斜向规则波作用下平直沙质岸滩演变基本规律,在波浪港池中开展三维波浪泥沙物理模型试验。试验结果表明:在上游无沙源补充的情况下,沙滩将形成不平衡沿岸输沙海岸和平衡沿岸输沙海岸。不平衡沿岸输沙海岸地形等深线分布不均匀,形态不顺直,近岸岸滩发生侵蚀,离岸处泥沙沉积,岸滩剖面坡度在近岸较陡,岸滩中部较缓,离岸处变陡;平衡沿岸输沙海岸等深线顺直,分布均匀,冲淤变化较小,近岸岸滩坡度较陡,离岸处岸滩坡度较缓。沿岸输沙量在离岸方向上分布呈中间大,近岸以及外海处小的趋势,随着试验时间的增加,离岸处沿岸输沙量逐渐减小,近岸处逐渐增大。In order to explore the basic law of beach evolution of sandy coast under the action of oblique regular waves with long time series,a three-dimensional wave sediment physical model experiment was carried out in a wave basin.The results show that:In the case of no sand source supplementation in the upstream,the beach will form a non-equilibrium longshore sediment transport coasts and an equilibrium longshore sediment transport coasts.The pattern of contours in the non-equilibrium longshore sediment transport coasts is uneven and not straight,the nearshore is eroded while the sediment is deposited offshore.The slope of the beach profile is steep nearshore,gentle in the middle of beach and steep offshore.The equilibrium region's contours are straight and evenly distributed,the change of scouring and silting depth is small.And the slope of equilibrium region is steep nearshore,gentle offshore.In the offshore direction,the distribution of coastal sediment transport is large in the middle and small in the nearshore and offshore,with the test time bypassing,the offshore longshore sediment discharge gradually decreases,while the nearshore longshore sediment discharge gradually increases.

关 键 词：规则波 岸滩地貌演变 沿岸输沙 三维波浪泥沙试验 

分 类 号：TV148.7[水利工程—水力学及河流动力学]