Tidal Flow Asymmetry Owing to Inertia and Waves on an Unstratified, Shallow Ebb Shoal

Wargula Anna; Raubenheimer Britt; Elgar Steve; Chen Jia‐Lin; Shi Fengyan; Traykovski Peter

摘要

Abstract >Observations of water levels, waves, currents, and bathymetry collected for a month at an unstratified tidal inlet with a shallow (1 to 2?m deep) ebb shoal are used to evaluate the asymmetry in flows and dynamics owing to inertia and waves. Along‐channel currents ranged from ?1.5 to 0.6?m/s (positive inland) inside the main (3 to 5?m deep) channel crossing the ebb shoal. Net discharge is negligible, and ebb dominance of the channel flows is owing to inflow and outflow asymmetries near the inlet mouth. Offshore wave heights ranged from 0.5 to 2.5?m. During moderate to large wave events (offshore significant wave heights >1.2?m), wave forcing enhanced onshore mass flux near the shoal edge and inside the inlet, leading to reduced ebb flow dominance. Momentum balances estimated with the water depths, currents, and waves simulated with a quasi 3‐D numerical model reproduce the momentum balances estimated from the observations reasonably well. Both observations and simulations suggest that ebb‐dominant bottom stresses are balanced by the ebb‐dominant pressure gradient and the tidally asymmetric inertia, which is a sink (source) of momentum on flood (ebb). Simulations with and without waves suggest that waves drive local and nonlocal changes in the water levels and flows. Specifically, breaking waves at the offshore edge of the ebb shoal induce setup and partially block the ebb jet (local effects), which leads to a more onshore‐directed mass flux, changes to the advection across the ebb shoal, and increased water levels inside the inlet mouth (nonlocal effects). </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >水平，波，电流和沐浴物的观察，在一个不增潮处收集一个月的一个月浅（1至2？M深）EBB Shoal的入口用于评估由于惯性和波浪而流动和动力学中的不对称性。沿着通道的电流从主题（3到5？M深）通道内的1.5到0.6？m / s（正面的内陆）范围。净放电可忽略不计，并且渠道流的终极主导地位由于入口嘴附近的流入和流出不对称。海上波浪高度从0.5到2.5？m。在中度到大波动事件（海上显着波浪高度>1.2Ωm）期间，波强迫浅座沿着浅滩边缘和入口内部的血管磁通量增强，导致衰减的颠膜流动优势。用拟模拟数值模型模拟的水深，电流和波浪估计的动量余额再现了从观察结果估计的势头余量。两个观察和模拟都表明EBB-显性底部应力由EBB主导压力梯度和第二个不对称惯性平衡，这是洪水（EBB）动量的水槽（源）。具有和无波的模拟表明，波浪驱动了水平和流动的局部和非局部变化。具体而言，在EBB浅滩的海上边缘处破坏波浪诱导设置并部分地阻止了EBB射流（局部效应），这导致了更多的血管导向的质量通量，对eBB浅滩的平流改变，以及内部的水平增加。入口口（非局部效应）。</ p> </ abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34643/'>《Journal of Geophysical Research, C. Oceans: JGR》</a> <b style="margin: 0 2px;">|</b><span>2018年第9期</span><b style="margin: 0 2px;">|</b><span>共21页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wargula Anna&option=202" target="_blank" rel="nofollow">Wargula Anna;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Raubenheimer Britt&option=202" target="_blank" rel="nofollow">Raubenheimer Britt;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Elgar Steve&option=202" target="_blank" rel="nofollow">Elgar Steve;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Chen Jia‐Lin&option=202" target="_blank" rel="nofollow">Chen Jia‐Lin;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Shi Fengyan&option=202" target="_blank" rel="nofollow">Shi Fengyan;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Traykovski Peter&option=202" target="_blank" rel="nofollow">Traykovski Peter;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>United States Naval AcademyAnnapolis MD USA;</p> <p>Woods Hole Oceanographic InstitutionWoods Hole MA USA;</p> <p>Woods Hole Oceanographic InstitutionWoods Hole MA USA;</p> <p>National Cheng Kung UniversityTainan City Taiwan;</p> <p>University of DelawareNewark DE USA;</p> <p>Woods Hole Oceanographic InstitutionWoods Hole MA USA;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=inlets&option=203" rel="nofollow">inlets;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=waves&option=203" rel="nofollow">waves;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=inertia&option=203" rel="nofollow">inertia;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=tidal asymmetry&option=203" rel="nofollow">tidal asymmetry;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ebb shoal&option=203" rel="nofollow">ebb shoal;</a> </p> <div class="translation"> 机译：入口;波浪;惯性;潮汐不对称;eBB Shoal; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025579893.html">Tidal Flow Asymmetry Owing to Inertia and Waves on an Unstratified, Shallow Ebb Shoal</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wargula Anna&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Wargula Anna,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Raubenheimer Britt&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Raubenheimer Britt,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Elgar Steve&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Elgar Steve,</a> <a href="/journal-foreign-34643/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of Geophysical Research, C. 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