The Influence of Intertidal Sandbar Welding on Dune Growth

潮间带沙洲焊接对沙丘生长的影响

• 批准号: 1561847
• 负责人: Peter Ruggiero
• 金额: $ 38.52万
• 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: 2016
• 资助国家: 美国
• 起止时间: 2016-06-01 至 2019-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1561847&HistoricalAwards=false
• 关键词: Influence; Intertidal; Sandbar; Welding; Dune

This coastal geomorphology project is relevant to the large coastal populations that rely on dunes for protection during storms and it could provide useful information for coastal planners and engineers. The project aims to advance understanding of the recovery and building of coastal dunes with a focus on the welding of intertidal sandbars to the shoreline. The investigators will develop novel approaches to measure the effects of waves and wind on the movement of sand. They will communicate findings to coastal management agencies and will train one PhD student and two undergraduate students.The goal is to improve understanding of beach-dune dynamics by testing the hypothesis that sediment supply to the backshore beach and dunes is dominated by the welding of intertidal sandbars to the shoreline. While this mechanism has long been proposed as critical, only limited quantitative data exists. The investigators propose a comprehensive field experiment (SEDEX2, the Sandbar-aEolian-Dune Exchange EXperiment) in which measurements of waves and wind, subaqueous and aeolian sediment transport, and subsequent morphological changes will be collected synoptically during an intertidal bar welding event along a highly progradational beach. The findings will inform conceptual and numerical models of beach-dune interaction and help to improve management of vital backshore resources.

该沿海地貌项目与在风暴期间依靠沙丘进行保护的大量沿海人口相关，它可以为沿海规划者和工程师提供有用的信息。该项目旨在增进对沿海沙丘恢复和建设的了解，重点关注潮间带沙洲与海岸线的焊接。研究人员将开发新方法来测量波浪和风对沙子运动的影响。他们将向沿海管理机构传达研究结果，并培训一名博士生和两名本科生。目标是通过检验后岸海滩和沙丘的沉积物供应主要由潮间带焊接所主导的假设，以提高对海滩沙丘动力学的理解。沙洲到海岸线。虽然这种机制长期以来一直被认为是至关重要的，但仅存在有限的定量数据。研究人员提出了一项综合性现场实验（SEDEX2，沙洲-风沙-沙丘交换实验），其中将在潮间带焊接事件期间沿高度收集波浪和风、水下和风成沉积物输送以及随后的形态变化的测量结果。渐进海滩。研究结果将为海滩-沙丘相互作用的概念和数值模型提供信息，并有助于改善重要的后岸资源的管理。