| 不同形态海湾的水底平衡剖面研究 |
| |
| 引用本文： | 苏文亮,邹志利,张庆民.不同形态海湾的水底平衡剖面研究[J].海洋学报,2020,42(5):128-138. |
| |
| 作者姓名： | 苏文亮 邹志利 张庆民 |
| |
| 作者单位： | 大连理工大学 海岸及近海工程国家重点实验室，辽宁 大连 116024 |
| |
| 基金项目： | 国家自然科学基金（51879033）。 |
| |
| 摘 要： | 研究海湾平衡剖面对理解海湾地貌演变具有重要意义。本文给出了收缩型、扩张型和矩形3种典型海湾平面形态对平衡剖面的影响。建立了海湾长度远小于潮汐波长的短尺度海湾的平衡剖面和对应的时均悬沙浓度的解析解。采用水深平均的水动力方程、泥沙输移方程和地形演变方程的耦合模型对以上3种类型海湾的平衡剖面进行了数值模拟，得到了这3种类型海湾的水面、流速、时均悬沙浓度和平衡剖面的计算结果，并利用水面数值结果确定了海湾水面解析解所含的一个待定常数。研究结果给出了3种不同海湾平面形态所对应的平衡剖面形态:矩形海湾对应斜坡型；收缩型海湾对应下凹型；扩张型海湾对应上凸型。所得海湾平衡剖面和时均悬沙浓度的解析解与数值解一致。
|
| 关 键 词： | 海湾 平衡剖面 数值模拟 悬沙浓度 |
| 收稿时间： | 2017/5/12 0:00:00 |
| 修稿时间： | 2019/3/5 0:00:00 |
Equilibrium bottom profiles of different embayment configurations |
| |
| Su Wenliang,Zou Zhili,Zhang Qingmin.Equilibrium bottom profiles of different embayment configurations[J].Acta Oceanologica Sinica (in Chinese),2020,42(5):128-138. |
| |
| Authors: | Su Wenliang Zou Zhili Zhang Qingmin |
| |
| Institution: | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China |
| |
| Abstract: | Investigating the morphodynamic equilibrium of embayment is important to understand the evolution of coastal morphology. This study investigates the effect of embayment shape on equilibrium bottom profile of the embayment. Three typical embayments, rectangular, convergent and divergent types, are considered to examine their bottom equilibrium profiles analytically and numerically. The approximate analytic solutions for bottom equilibrium profile and mean sand concentration applicable to the three types of the embayments are established for the case of embayment’s length much smaller than tidal wave length. The two-dimensional depth-average model coupling hydrodynamics, sand transformation and bottom evolution is adopted to simulate the embayment equilibrium state of these three types of embayments, and the numerical result of surface elevation is then applied to determine the two parameters contained in the bottom analytic solution. The research results give the three different equilibrium bottom profiles: the plane slope for rectangular embayment; the downward convex form for convergent embayment and the upward concave form for divergent embayment. The good agreements between the theoretical and numerical results of tidal current, sand concentration and bottom profile are achieved. |
| |
| Keywords: | embayment equilibrium profile numerical simulation sand concentration |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《海洋学报》浏览原始摘要信息 |
| 点击此处可从《海洋学报》下载免费的PDF全文 |
