Wind erosion measurement system

几十年来对沿海和沙漠沙丘的气流和沙粒运移的研究为不同沙丘形态的形成、形成和保持流动性提供了高质量的经验数据。尽管取得了这些进展，但对于供应有限的内陆沙丘地貌，特别是抛物线沙丘和喷发沙丘上的气流和沙粒输送模式，人们知之甚少。这是有问题的，因为活跃的内陆沙丘对生物多样性至关重要，但目前几乎没有基线信息来帮助养护和管理这些有价值的生态系统组成部分。具体地说，在供应有限的内陆沙丘上，沙丘地形、植被、近地表气流和沙子运移之间的相互作用还没有得到很好的了解。众所周知，这种相互作用通过水流-形态相互作用和由此产生的次生水流效应，对沿海和沙漠环境中的沙丘移动施加主要控制。然而，此前没有对供应有限的内陆沙丘进行详细调查，以记录这些相互作用。我最近在北部大平原进行的实地研究(Hugenholtz&Wolfe，2006；Hugenholtz等人，2007年)的结果清楚地表明，高分辨率的气流和沙粒输送测量将澄清控制供应有限的内陆沙丘的发育和流动的流动形式相互作用和次生流动效应。解决这些特征将有助于开发更全面的内陆沙丘动态的数值和过程响应模式。为此，要求NSERC RTI资金购买创新的风蚀测量系统，该系统将能够高分辨率、同步地测量活跃和部分稳定的抛物面沙丘和井喷的气流和沙通量。该系统将被用作相应的NSERC发现拨款提案的一部分，该提案旨在调查大平原北部半干旱地区风沙过程与沙丘移动性之间的关系。地球表面过程与地貌31：1540-1557；胡根霍兹，沃尔夫，SA，Walker IJ&BJ Moorman，2007。地貌学(印刷中)。

Decades of airflow and sand transport studies on coastal and desert sand dunes have provided high-quality empirical data on how different dune morphologies are created, develop their form and maintain mobility. Despite these advances, little is known about airflow and sand transport patterns on supply-limited, inland dune morphologies, particularly on parabolic dunes and blowouts. This is problematic because active inland dunes are critically important to biodiversity, yet little baseline information currently exists to help conserve and manage these valued ecosystem components. Specifically, the interactions between dune topography, vegetation, near-surface airflow and sand transport on supply-limited inland dunes are not well understood. Such interactions are known to exert major controls on dune mobility in coastal and desert environments via flow-form interactions and resulting secondary flow effects. However, no detailed investigation has been previously undertaken on supply-limited inland dunes to document these interactions. Results from my recent field studies in the Northern Great Plains (Hugenholtz & Wolfe, 2006; Hugenholtz et al., 2007) indicate clearly that high-resolution airflow and sand transport measurements would clarify flow-form interactions and secondary flow effects that control the development and mobility of supply-limited inland dunes. Resolving these characteristics will aid in the development of more comprehensive numerical and process-response models of inland dune dynamics. To this end, NSERC RTI funds are requested to purchase an innovative Wind Erosion Measurement System that will enable high-resolution, synchronized measurements of airflow and sand flux across active and partially stabilized parabolic dunes and blowouts. This system will be used as part of a corresponding NSERC Discovery Grant proposal to investigate relations between aeolian processes and dune mobility in the semi-arid portion of the Northern Great Plains.REFERENCES: Hugenholtz CH & SA Wolfe, 2006. Earth Surface Processes & Landforms 31: 1540-1557; Hugenholtz CH, Wolfe SA, Walker IJ & BJ Moorman, 2007. Geomorphology (in press).