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

这项提案是为了申请额外的资金支持，以开展一个由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。NCED是由国家科学基金会资助的科学技术中心。它成立于2002年8月，总部设在圣彼得堡。明尼苏达大学安东尼·福尔斯实验室。该基金项目的标题是推移质泥沙沉积实验研究丁坝周围的泥沙沉积。NCED奖励的总金额为3万美元，包括一名机械师、一名仪器专家、一名初级技师、一名毕业生和旅费。NCED还将提供实验水槽和所有测量设备。由于NCED不会为PI的工资提供支持，本提案要求额外的财政支持以支付PI的部分工资。受资助的项目旨在对圣安东尼瀑布大学圣安东尼瀑布实验室丁坝周围的水动力流场和推移质泥沙分类进行实验研究。研究的目的是研究复杂湍流场下推移质输沙的基本机理，研究紊流强度对推移质泥沙分选的影响，为输沙模型的验证提供准确的流场、冲坑几何形状和床料级配数据集。广泛的影响：广泛的科学影响：1)本试验研究将为分段式推移质输沙模型的检验提供一个数据集；2)该数据集可用于分析湍流强度对丁坝附近推移质分选的影响；3)实验数据集还将用于验证沙漠研究所(DRI)P.I.开发的二维泥沙传输模型；4)实验数据集将通过互联网向公众开放。该项目将在内华达州、EPSCoR州和NCED之间架起一座桥梁。合作研究的主题是1)复杂流场中的非均匀泥沙输运机制；2)计算流体动力学模型在模拟地球表面动力学过程中的应用；3)扩大数值模型以长期模拟形态动力学过程。

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.