粉砂淤泥质潮滩对于波浪作用的响应  

Evolution of silt and muddy tidal flat with effect of waves

作　　者：汪垚 谢婕 Wang Yao;Xie Jie(Shanghai waterway engineering design and consulting Co.,Ltd.,Shanghai 200120,China)

机构地区：[1]中交上海航道勘察设计研究院有限公司,上海200120

出　　处：《港工技术》2021年第2期1-8,共8页Port Engineering Technology

摘　　要：以江苏中部沿海的开敞型粉砂淤泥质潮滩为原型,建立平面二维潮流、波浪、泥沙输运及地貌演变概化数学模型,研究了潮流、波浪作用下潮滩地貌演变机制,重点分析粉砂淤泥质潮滩对于波浪作用的响应。研究表明,在潮汐作用为主时,潮滩保持淤长的趋势,剖面形态保持双凸形;随着波浪作用的增强,床面冲刷作用增强,淤长型潮滩转变为侵蚀性潮滩,双凸形剖面逐步转变为凹形剖面;波浪方向还影响着潮滩剖面的演变。Based on the open silt mudflats located in the middle coastal area of Jiangsu province,a two-dimensional numerical model was established to simulate tidal currents,wave,sediment transport and landform evolution.The mechanism of mudflats evolution under the impact of tidal currents and wave were studied,and the response of silt mudflats to wave action was analyzed emphatically.It shows that the deposition of mudflats is increasing subject to tidal action being dominant,complete with biconvex profile.The erosion force acting on riverbed increases with the increment of wave action,the depositional mudflats becomes an erosive mudflats and the biconvex profile is gradually transformed into concave profile.Wave direction also affects the evolution of mudflats profile.

关 键 词：潮滩 潮汐 波浪 地貌演变 

分 类 号：TV148[水利工程—水力学及河流动力学]