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: 2219855
• 负责人: Anna Pfeiffer-Herbert
• 金额: $ 15.48万
• 依托单位: Stockton 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=2219855&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，测深的复合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影响很大，但对于商业和休闲渔业，内陆水运输，从风暴中缓冲沿海社区的重要区域以及敏感的沿海底栖生物和沼泽生态系统的家园。该项目将使用理想化和现实的数值建模研究与现场观测相结合，研究具有多个入口的泻湖系统。这项工作将重点放在新泽西州的Barnegat湾和邻近的泻湖上，以检验以下假设：潮汐驱动的入口残留运动是控制循环时间，停留时间以及泻湖水质的主要机制。泻湖的停留时间，水质和整体生态健康对泻湖入口的净运输高度敏感，并且可能对进气口敏感。该研究将试图表征这种敏感性，并为理解其生态和社会含义提供动态框架。该项目包括支持两名研究生的专业发展，并将为本科生提供研究机会和专家STEM教育。将向与泻湖保护有关的组织，海洋扩展和公共计划进行外展活动。该项目将与ROM一起使用理想化和现实的建模，并结合观察结果来量化Stokes和Eulerian运输，这些运输总和通过代表性Barnegat湾的新泽西州系统中的多个入口汇总到拉格朗日运输。虽然将从模型输出中获得这些传输量的最详细估计值，但观察数据中的估计值将通过潮汐放大器，潮汐海平面的变异性以及潮汐周期过程（如通道/浅滩交换和捕获）提供对这些术语调节的关键见解。将解决三个主要假设：H1。泻湖和沿海海洋（入口）之间连接处的平均循环和净运输以潮流的流动为主。 H2。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。浮力投入和风暴在入口处修改潮流的整流（以及净运输）。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为是通过评估而被视为珍贵的支持。