SGER: Experimental Study of Bed Load Sediment Sorting around Spur Dikes

0532691端：为开展明尼苏达大学国家地球表面动力学中心（NCED）资助的研究项目，申请补充资金支持。国家科学技术中心是国家科学基金资助的科学技术中心。该公司成立于2002年8月，总部设在泰国。安东尼·福尔斯实验室在明尼苏达大学（UM）。资助项目名称为：堤防周围河床泥沙分选试验研究。NCED颁发的总金额为30,000美元，包括一名机械师，一名仪器专家，一名初级技术员，一名研究生的费用和旅费。NCED还将提供实验水槽和所有测量设备。由于国家发展与发展委员会不会为PI的薪金提供支助，因此本提案要求额外的财政支助，以部分支付PI的薪金。获资助的项目旨在于澳大圣安东尼瀑布实验室进行水动力流场及河床泥沙分选的实验研究。研究复杂湍流流场下床质输沙的基本机制，研究湍流强度对床质输沙分选的影响，获得准确的流场、冲刷孔几何形状和床质级配数据，为输沙模型的验证提供依据。广泛影响：广泛的科学影响有四方面：1)本实验研究将为分级床质输运模型的测试提供数据集；2)该数据可用于分析湍流强度对水柱周围层载分选的影响；3)实验数据集还将用于验证P.I.在沙漠研究所（DRI）开发的二维泥沙输运模型；4)实验数据集将通过互联网向公众开放。该项目将成为内华达州、epscor州和NCED之间合作的桥梁。合作研究方向为：1)复杂流场中非均匀输沙机制；2)计算水动力模型在模拟地表动力过程中的应用；3)长期模拟形态动力学过程的数值模型。

0532691DuanThis proposal is to apply for supplemental financial support to conduct a researchproject funded by the National Center for Earth Surface Dynamics (NCED) at theUniversity of Minnesota. NCED is a science and technology center funded by theNational Science Foundation. It was founded in August 2002 and is headquartered at theSt. Anthony Falls Laboratory at the University of Minnesota (UM).The title of the funded project is Experimental Study of Bed Load SedimentSorting around Spur Dikes. The total amount awarded by NCED is $30,000, coveringthe cost of one machinist, one instrument specialist, one junior technician, one graduatestudent, and the travel. NCED will also provide the experimental flume and allmeasurement equipment. Because NCED will not provide support for the PI's salary,this proposal requests additional financial support to partially cover the PI's salary.The funded project aims to conduct experimental study on hydrodynamic flowfield and bed load sediment sorting around spur dikes at the St. Anthony Falls Laboratoryat UM. The goals are to study the fundamental mechanism of bed load transport under thecomplex turbulent flow field, investigate the effect of turbulent intensity on bed loadsediment sorting, and obtain an accurate dataset of flow field, scour hole geometry, andbed material gradation for the verification of sediment transport models.Broad Impacts:The broad scientific impacts are four-fold: 1) This experimental study willprovide a dataset for the testing of fractional bed load transport models; 2) The datasetcan be used to analyze the impact of turbulent intensity on bed load sorting around spurdikes; 3) The experimental dataset will also be used to verify a two-dimensional sedimenttransport model developed by the P.I. at the Desert Research Institute (DRI); 4) Theexperimental dataset will be available to the public through the internet.The project will bridge the collaborations between the state of Nevada, anEPSCoR state, and NCED. The collaborative research themes are 1) mechanisms of nonuniformsediment transport in complex flow fields; 2) application of computationalhydrodynamic models in simulating earth surface dynamic processes; and 3) up-scalingnumerical models for the long-term simulation of morpho-dynamic processes.