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

0532691段此建议是申请补充资金支持，以进行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是一个由美国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St。明尼苏达大学（UM）安东尼福尔斯实验室的资助项目的标题是丁坝周围推移质泥沙分选的实验研究。NCED授予的总金额为30，000美元，涵盖一名机械师、一名仪器专家、一名初级技术员、一名研究生的费用和差旅费。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，因此本建议要求额外的财政支持，以支付PI的部分工资。该资助项目旨在对位于圣安东尼福尔斯水库的丁坝周围的水动力流场和推移质泥沙分选进行实验研究。本研究的目的是研究复杂紊流条件下推移质输移的基本机理，探讨紊流强度对推移质泥沙分选的影响，获得精确的流场、冲刷坑几何形状和床沙级配数据，用于泥沙输移模型的验证。广泛的科学影响：广泛的科学影响有四个方面：1）本试验研究可为推移质输移模型的检验提供数据，2）试验结果可用于分析紊动强度对丁坝推移质分选的影响; 3）实验数据还将用于验证P.I.实验数据集将通过互联网向公众开放。该项目将为内华达州、EPSCoR州和NCED之间的合作架起桥梁。合作研究的主题是：1）复杂流场中非均匀泥沙输移的机理; 2）计算水动力模型在模拟地表动力过程中的应用; 3）用于长期模拟地貌动力过程的放大数值模型。

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.