Bridging the Gap Between Sediment Transport and the Evolution of Complex Morphology

弥合沉积物迁移与复杂形态演化之间的差距

• 批准号: 9424507
• 负责人: Gary Parker
• 金额: $ 24万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-10-01 至 1999-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9424507&HistoricalAwards=false
• 关键词: Bridging; Gap; Between; Sediment; Transport

ABSTRACT CTS-9424507 PARKER MINNESOTA This research deals with three problems involving the relation between sediment transport and stream morphology. The first consists of the pursuit of a morphologic bedload relation for gravel-bed rivers dominated by alternate bars. A combination of numerical, experimental and field work will be used to move from a local relation for gravel transport to a global one that inherently includes that bar structure. The second is concerned with the formation of fluvially-dominated alluvial fans. Here theory and experiment are to combined to obtain a mechanistic, predictive model of alluvial fan structure and evolution from considerations of the individual distributary channels. The work will be augmented by avaiable field data. The third topic is cyclic steps. This newly-recognized bedform headcuts and chute-and-pool topography. Experiments will be combined with theory for a complete explanation of the form in question.

摘要CTS-9424507帕克明尼苏达州 本研究主要探讨三个问题，即泥沙输移与河流形态的关系。 第一个包括追求的形态推移质关系的砾石床河流为主的交替酒吧。 将使用数值、实验和实地工作相结合的方法，从砾石运输的局部关系转变为固有地包括该沙洲结构的全球关系。 第二个是河流冲积扇的形成。 本文将理论与实验相结合，从单个分流河道的角度出发，建立了冲积扇结构与演化的机理性预测模型。 这项工作将得到现有的实地数据的补充。 第三个主题是循环步骤。 这种新认识的底形水头和槽池地形。 实验将与理论相结合，以完整地解释所讨论的形式。