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Impacts of Stream Bed Adjustments on Local Bridge Morphology

项目名称：	Impacts of Stream Bed Adjustments on Local Bridge Morphology
摘要：	The goal of this project is to synthesize a hydrodynamic model with improved methods of representing sediment transport to better predict short-term and long-term channel migration for aggraded sand-bed rivers. Our team can rapidly and reliably collect detailed flow and topographic data and incorporating that data into the model will provide results that are more accurate and more quickly implemented than previous efforts. In addition, the model will be developed at a bridge crossing (Highway 281 over the Niobrara River) with a strongly aggraded streambed, a crossing that is of particular interest to NDOT because of the potential for abutment undermining, scour issues, and ice damage. The result of the project will be a documented strategy for rapidly collecting relevant field data associated with channel bed migration predictions, a detailed plan for incorporating that data into a hydraulic model with new modules for accurately simulating sediment transport and bedforms, and demonstrated short-term accuracy of the model at a field site that is of actual interest to NDOT. In addition, recommendations will be provided for collecting future data sets to validate the longer-term performance of the modeling approach. Along the way, channel migration concerns identified by the research team at the study site will be relayed to NDOT for possible mitigation efforts.
状态：	Active
资金：	134,860.00
资助组织：	Nebraska Department of Transportation
项目负责人：	Halsey, Lieska
主要研究人员：	Admiraal, David M；Wood, Richard；Roy, Tirthankar
开始时间：	20220701
预计完成日期：	20240531
主题领域：	Environment；Hydraulics and Hydrology；Research