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 PARKER 明尼苏达 这项研究涉及涉及沉积物输送和河流形态之间关系的三个问题。 第一个目标是寻找以交替坝为主的砾石河床河流的形态河床荷载关系。 将结合数值、实验和现场工作，将砾石运输的局部关系转变为固有地包括该杆结构的全局关系。 第二个与以河流为主的冲积扇的形成有关。 这里将理论和实验结合起来，从单个分流河道的考虑中获得冲积扇结构和演化的机械预测模型。 可用的现场数据将增强这项工作。 第三个主题是循环步骤。 这种新近认可的床形头部切割和滑道和水池地形。 实验将与理论相结合，以完整解释所讨论的形式。