Hyperpycnal River Plumes - An Opportunity to Study Their Transport and Deposition in a Controlled Dam-Removal Experiment

PIS提出了一项研究，利用拆除一条山区小河上的两个大坝来研究重力驱动的沉积物在充满活力的大陆架上扩散的过程和产物。在一些大陆架上，超低温水流和流体泥浆已被认为是泥沙运输的重要方式，但对它们的运作方式知之甚少。拟议的研究包括一套全面的水柱测量和海底采样活动，旨在捕捉大坝拆除后预计会发生的事件。拟议的工作还将补充美国地质勘探局将开展的实地研究和建模工作。这项工作还将为波浪、潮汐和洋流对高浓度泥沙排放的影响提供物理证据。广泛的影响：与美国地质勘探局和其他DOI机构的协调工作将有助于改善对这条海岸线未来命运的预测，因此将产生相当大的社会影响。这项研究还计划用于学生培训，并作为海洋学课程课程的范例。

0623682OgstonThe PIs propose a study to exploit the removal of two dams on a small mountainous river to study processes and products of gravity-driven sediment dispersal on an energetic continental shelf. Hyperpycnal flows and fluid muds have been recognized as important modes of sediment transport on some shelves, relatively little is known about how they operate. The proposed study includes a comprehensive set of water column measurements and seabed sampling campaigns designed to capture the events anticipated to follow from dam removal. The proposed work will also complement field studies and modeling work to be carried out by USGS. The work will also provide physical evidence on the influence of waves, tides, and currents on high concentration sediment discharge.Broader impacts: Working in coordination with the USGS and other DOI agencies will help improve predictions as to the future fate of this coastline and will thus have considerable societal impact. The study is also planned for student training and as an example in oceanography course curricula.