Evaluating the controls of hillslope morphology on nonlocal sediment transport: analytical and experimental approaches

Danica Roth博士获得了NSF EAR博士后奖学金，在俄勒冈大学和范德比尔特大学开展研究和教育计划。本研究的主要目的是建立和提高非局部泥沙输移数值模式在实际景观中的适用性。非局部泥沙搬运过程包括树木投掷和洞穴动物的生物扰动，以及火诱导的碎屑。该项目由几个截然不同但相互补充的模块组成，其中包括一系列实验、实地和数据驱动的组成部分，它自然有助于在K-12和本科生一级开展外联、教育和辅导。罗斯博士将在美国国家科学基金会资助的俄勒冈大学科学与工程教育者专业发展计划中设立一个新的分会，为研究生和博士后提供公平的探究式教学法培训。这一计划将是利用这项研究的数据设计一项新的基于实地的调查活动的场所。这项活动将在俄勒冈大学的山坡地貌学课程中教授，并在在线教育档案中公开提供。该项目所包含的主题(例如，对火灾的侵蚀反应和砍伐)的社会相关性也将引起公众的兴趣，并通过在YouTube和我们的网页上发布的公开讲座、受欢迎的新闻报道和教育内容提供机会来提高对这些问题的认识。该项目将弥合关于非本地交通的成熟理论工作与基于现场的测量和应用非本地交通的需求之间的差距。这项研究还将在广泛的自然场环境中生成关于粒子传输距离的有价值的数据集。非本地运输模型将通过考虑粗糙度来解决现有模型的主要弱点之一。通过粗糙度对临界坡度和粗糙度元素的概率间距的影响，将粗糙度的影响纳入非局部颗粒剥离公式。将制定一个关于本地和非本地运输过程相对重要性的修正的P？clt数，并在一系列自然环境中进行现场测试。所有的分析和理论都将被告知，并通过现场实验进行测试，以比较俄勒冈州海岸山脉和俄勒冈州中部彩绘丘陵荒地的粒子移动距离和侵蚀率。

Dr. Danica Roth has been granted an NSF EAR Postdoctoral Fellowship to carry out research and education plans at the University of Oregon and Vanderbilt University. The primary objective of this study is to establish and enhance the applicability of the nonlocal sediment transport numerical model in real landscapes. Nonlocal sediment transport processes include bioturbation by tree throw and burrowing animals, and fire-induced ravel. The project is composed of several distinct but complementary modules with a range of experimental, field- and data-driven components, and it naturally lends itself to outreach, education and mentorship at the K-12 and undergraduate-level. Dr. Roth will establish a new chapter of the NSF-funded Institute for Science and Engineer Educators' Professional Development Program at the University of Oregon, which will provide graduate students and postdocs with training in equitable, inquiry-based pedagogy. This program will be a venue to design a new field-based inquiry activity utilizing data from this study. The activity will be taught in the Hillslope Geomorphology class at the University of Oregon and made publicly available in online educational archives. The social relevance of topics encompassed by this project (e.g., erosional responses to fires and clear cutting) will also generate public interest and provide opportunities to increase awareness of these issues through public lectures, popular press pieces, and educational content published on YouTube and our web pages.This project will bridge the gap between the well-developed theoretical work on nonlocal transport and the need for field-based measurements and applications of nonlocal transport. This study will also generate valuable datasets on particle transport distances in a wide range of natural field settings. The nonlocal transport model will address one of the major weaknesses of existing models by taking into account roughness. The effects of roughness will be incorporated into the nonlocal formulation for particle disentrainment via its influence on critical slope and the probabilistic spacing of roughness elements. A modified PØclet number for the relative importance of local and nonlocal transport processes will be developed and field-tested in a range of natural settings. All analyses and theory will be informed and tested with field experiments to compare theoretical and measured particle travel distances and erosion rates in the Oregon Coast Range and the Painted Hills badlands in Central Oregon.