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.

这个沿海地貌项目与依靠沙丘在暴风雨期间进行保护的大量沿海人口有关，它可以为沿海规划师和工程师提供有用的信息。该项目旨在提高人们对沿海沙丘的恢复和建造的理解，重点是将潮间带的沙洲焊接到海岸线。研究人员将开发新的方法来测量波和风对沙子运动的影响。他们将向沿海管理机构传达调查结果，并将培训一名博士生和两名本科生。目的是通过测试以下假设来提高对海滩动力学的理解，即对后岸海滩的沉积物供应供应，而沙丘由潮汐层间栏的焊接为主导。尽管长期以来一直认为这种机制是至关重要的，但仅存在有限的定量数据。研究人员提出了一项全面的田间实验（SEDEX2，沙洲 - 艾尔·丁格交换实验），其中的测量波和风，水下和风力的沉积物传输以及随后的形态变化将在沿着高度延伸的海滩沿潮间带焊接事件期间进行共同的培养基变化。这些发现将为海滩互动的概念和数值模型提供依据，并有助于改善重要的后岸资源的管理。