The Influence of Intertidal Sandbar Welding on Dune Growth

这一沿海地貌学项目与在风暴期间依靠沙丘保护的大量沿海人口有关，它可以为沿海规划者和工程师提供有用的信息。该项目旨在促进对沿海沙丘的恢复和建造的了解，重点是将潮间带沙洲与海岸线连接起来。研究人员将开发新的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通报调查结果，并将培训一名博士生和两名本科生，目的是通过检验以下假设，即向后滨海滩和沙丘提供沉积物的主要方式是将潮间带沙洲与海岸线连接起来，从而提高对海滩沙丘动态的认识。虽然这种机制长期以来一直被认为是至关重要的，但只有有限的定量数据。调查人员提出了一个全面的实地实验（SEDEX 2，沙洲-风成沙丘交换实验），其中测量的波浪和风，水下和风成沉积物运输，以及随后的形态变化将收集在一个潮间带酒吧焊接事件沿沿着一个高度adminational海滩天气。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，并有助于改善对重要的后滨资源的管理。

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.