RAPID: Impacts and recovery of natural and managed coastal dunes on a South Carolina barrier island from Hurricane Ian

RAPID：飓风伊恩对南卡罗来纳州障壁岛自然和管理沿海沙丘的影响和恢复

• 批准号: 2306048
• 负责人: Jean Ellis
• 金额: $ 2.56万
• 依托单位: University of South Carolina at Columbia
• 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: 2022-12-01 至 2024-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2306048&HistoricalAwards=false
• 关键词: RAPID; Impacts; recovery; natural; managed

Sand dunes are a critical component of the coastal-aeolian geomorphic system and are a coastline defense mechanism in management practice. Given the anthropogenic actions on the natural and surrounding built environment, it is becoming commonplace to maintain the dune systems artificially. These ‘managed’ dunes frequently comprise nourished sand with intentionally planted vegetation. However, little is known about contemporary land-use dynamics of these systems, despite the relationships to historically studied concepts in aeolian geomorphology (i.e., impacts of roughness elements on aeolian transport). This RAPID project will allow the opportunity to collect time-sensitive field-based data to quantify Hurricane Ian's biogeomorphic impacts and recovery on a managed and natural dune system and to compare those measurements to the pre-storm conditions. The project will enhance diversity in STEM by providing support in an EPSCoR state for a principal investigator and graduate student who are both from underrepresented groups in the field of geomorphology and land-use dynamics.The investigators will conduct one year of field-based data collection to measure the topographic characteristics and management treatments on coastal dunes. The field effort will include Terrestrial Laster Scanning and vegetation surveys. These surveys will build on a dataset collected before Hurricane Ian along South Carolina barrier islands. The investigators will use the collected data to test hypotheses related to the biogeomorphic response of managed and natural dune systems, the recovery trajectories of these dunes, and the accretion rates on managed dunes with and without fences. This project could lead to future process-based research on the influence of extreme events on dune formation and evolution under different land-use scenarios. The results could contribute both to the scientific and management communities. The project will involve stakeholder meetings with South Carolina Beach Advocates.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.

沙丘是海岸风沙地貌系统的重要组成部分，是管理实践中的一种海岸线防御机制。考虑到对自然和周围建成环境的人为作用，人工维护沙丘系统正变得司空见惯。这些“受管理的”沙丘通常由营养丰富的沙子和特意种植的植物组成。然而，人们对这些系统的当代土地利用动态知之甚少，尽管这与历史上研究的风沙地貌学概念(即粗糙度元素对风沙输送的影响)有关。这一快速项目将有机会收集时间敏感的实地数据，以量化飓风伊恩对受管理的自然沙丘系统的生物地貌影响和恢复，并将这些测量结果与风暴前的情况进行比较。该项目将通过在EPSCoR状态下向地貌和土地利用动态领域中代表性不足的群体的首席调查员和研究生提供支助，加强STEM的多样性。调查员将进行为期一年的实地数据收集，以测量沿海沙丘的地形特征和管理处理。实地工作将包括陆地激光扫描和植被调查。这些调查将建立在飓风伊恩之前沿南卡罗来纳州屏障岛屿收集的数据集的基础上。研究人员将使用收集的数据来检验与受管理沙丘系统和自然沙丘系统的生物地貌响应、这些沙丘的恢复轨迹以及有围栏和没有围栏的受管理沙丘的吸积率有关的假设。该项目可能导致未来对不同土地利用情景下极端事件对沙丘形成和演变的影响进行基于过程的研究。这一成果可以为科学界和管理界做出贡献。该项目将包括与南卡罗来纳州海滩倡导者的利益相关者会议。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。