基于挟沙力方法的潮滩剖面形态演变数值模型  

Numerical model for morphological evolution of tidal flat profile based on sediment carrying capacity method

作　　者：陈治澎 罗锋 李瑞杰[3] 张弛[1] CHEN Zhi-peng;LUO Feng;LI Rui-je;ZHANG Chi(College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;Nantong Ocean and Coastal Engineering Research Institute,Hohai University,Nantong 226000,China;Key Laboratory of Ministry of Education for Coastal Disaster and Protection,Hohai University,Nanjing 210024,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]南通河海大学海洋与近海工程研究院,江苏南通226000 [3]河海大学海岸灾害及防护教育部重点实验室,江苏南京210024

出　　处：《泥沙研究》2024年第4期60-66,共7页Journal of Sediment Research

基　　金：国家重点研发计划项目(2022YFC3106100);江苏省海洋科技创新项目(JSZRHYKJ202105,JSZRHYKJ202303);南通社会民生科技计划项目(MS12022009,MS22022082,MS22022083)。

摘　　要：为研究波流共同作用下的潮滩剖面形态演变,推导了基于切应力方法的挟沙力公式,开发了基于挟沙力方法的潮滩剖面形态演变数值模型,模拟结果与Delft3D模型基本一致,计算效率明显提升。分别采用切应力方法和挟沙力方法模拟潮滩形态的演变过程,挟沙力方法在潮间带上部区域的模拟效果优于切应力方法,更容易模拟出淤积条件下的上凸形剖面,整体剖面形态更接近实测剖面。计算模拟了潮滩剖面在不同波浪条件下的演变过程,波浪对潮滩形态有极强的塑造作用,入射波高的提升加剧了潮间带的侵蚀,形成明显的下凹形剖面。To investigate the morphological evolution of intertidal profiles under the interaction of wave and tidal current,a sediment carrying capacity formula based on the shear stress method is derived and has been used to develop the numerical model for intertidal profile morphological evolution.The simulation results are generally consistent with those by the Delft3D model,and the computational efficiency is significantly improved.The models using the shear stress method and sediment carrying capacity method were used to simulate the intertidal profile evolution.The results show that the sediment carrying capacity method has a better simulation effect in the upper region of the intertidal zone than that by the shear stress method,making it easier to simulate the convex profile under sedimentation conditions,and the overall profile shape is closer to the measurement.The simulation of intertidal profile evolution under varying wave conditions reveals the profound influence of waves on profile morphology.An increase in incident wave height notably exacerbates erosion in the intertidal zone,resulting in forming a distinct concave profile.

关 键 词：挟沙力 潮滩 地貌演变 数值模拟 波浪侵蚀 

分 类 号：TV148.5[水利工程—水力学及河流动力学]