Collaborative Research: Tidally rectified flows in multiple inlet/lagoon systems: Consequences for transport and residence times

合作研究：多个入口/泻湖系统中的潮汐整流流：对运输和停留时间的影响

• 批准号: 2219928
• 负责人: James Lerczak
• 金额: $ 34.09万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-15 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2219928&HistoricalAwards=false
• 关键词: Collaborative; Research; Tidally; rectified; flows

Shallow, bathymetrically-complex lagoon systems comprise a significant fraction of the world’s coastlines, including those of the United States. These systems are highly impacted by human activity, yet are vitally important regions for commercial and recreational fisheries, inland water transportation, buffering coastal communities from storms, and are home to sensitive coastal benthic and marsh ecosystems. This project would study lagoon systems with multiple inlets, using idealized and realistic numerical modeling studies combined with field observations. The work would focus on Barnegat Bay and adjacent lagoons in NJ to test the hypothesis that tidally-driven residual motions at inlets are the dominant mechanism controlling circulation, residence time and, consequently water quality of lagoons. Residence time, water quality and overall ecological health of lagoons are highly sensitive to net transport at lagoon inlets and are likely sensitive to inlet modification. The study would seek to characterize this sensitivity and provide a dynamical framework for understanding its ecological and societal implications. The project includes support for the professional development of two graduate students and will provide research opportunities and experiential STEM education for undergraduate students. Outreach presentations will be given to organizations, marine extension and public programs concerned with lagoon conservation. The project will use idealized and realistic modeling with ROMS, combined with observations to quantify both Stokes and Eulerian transport, which sum to the Lagrangian transport through the multiple inlets in the representative Barnegat Bay, NJ system. While the most detailed estimates of these transport quantities will be obtained from model output, estimates from observational data will provide key insights into the modulation of these terms by tidal amplitude, variability of subtidal sea level, and tidal period processes such as channel/shoal exchange and trapping. Three main hypotheses will be addressed: H1. Mean circulation and net transport at connections between the lagoon and the coastal ocean (inlets) are dominated by tidally-rectified flows. H2. The presence of multiple inlets significantly influences net transport between the lagoon and the coastal ocean as well as the circulation and residence time within the lagoon. H3. Buoyancy inputs and storms modify tidal rectification (and thus net transport) at inlets.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

浅水、测深复杂的泻湖系统占世界海岸线的很大一部分，包括美国的海岸线，这些系统受到人类活动的严重影响，但对于商业和休闲渔业、内陆水域运输、缓冲沿海社区至关重要。该项目将利用理想化和现实的数值模型研究与实地观测相结合，研究具有多个入口的泻湖系统。和新泽西州邻近的泻湖，以检验以下假设：入口处潮汐驱动的残余运动是控制环流、停留时间的主要机制，因此泻湖的停留时间、水质和整体生态健康对净高度敏感。该研究将寻求描述这种敏感性，并提供一个动态框架来理解其生态和社会影响。该项目包括为两名研究生的专业发展提供支持。将为本科生提供研究机会和体验式 STEM 教育，并将向与泻湖保护有关的组织、海洋推广和公共项目进行推广演示。该项目将使用 ROMS 的理想化和现实建模，并结合观测来量化斯托克斯和欧拉。传输量，即通过新泽西州巴尼加特湾代表性系统中多个入口的拉格朗日传输量的总和，虽然这些传输量的最详细估计将通过模型输出获得，但观测数据的估计将提供对传输量的重要见解。将讨论潮汐幅度、潮下海平面变化和潮汐周期过程（例如河道/浅滩交换和俘获）对这些项的调节： H1。 （入口）以潮汐校正流为主。多个入口的存在显着影响泻湖和沿海海洋之间的净运输以及泻湖内的循环和停留时间。 H3. 浮力输入和风暴改变入口处的潮汐校正（从而改变净传输）。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。