Doctoral Dissertation Research: Effects of the Spatial and Temporal Distribution of Form Roughness on Sediment Transport

博士论文研究：形状粗糙度时空分布对泥沙输运的影响

• 批准号: 9628720
• 负责人: Douglas Sherman
• 金额: $ 1万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-15 至 1997-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9628720&HistoricalAwards=false
• 关键词: Doctoral; Dissertation; Research; Effects; Spatial

Kammerer, Martin T U. of Southern California The research is directed toward an improved understanding of process-response interactions within river channels. Specifically, the spatial distribution and temporal evolution of bottom roughness elements and sediment transport rates will be examined with particular focus on feedback interactions. It is hypothesized that bedforms exert important controls on in-channel processes and thereby influence the spatial and temporal distribution of sediment transport rates and pathways. Frictional components of bedforms are viewed as active, rather than passive. This ultimately has important ramifications for channel stability. The crucial aspect of the work is to evaluate sediment transport processes in light of a drag-partitioned view of the fluid power available in a river system. A detailed study of velocity profiles, sediment transport rates and bottom configuration will be collected in the Green River of Colorado. The data will be analyzed within 'local' and 'spatial' frameworks. The results will yield new understanding of sediment transport predictive capabilities and bedform existence fields.

加利福尼亚州马丁·卡默尔（Kammerer），这项研究旨在提高人们对河流渠道中过程响应相互作用的了解。 具体而言，将检查底部粗糙度元件和沉积物传输速率的空间分布和时间演变，以特别关注反馈相互作用。 假设床形成对渠道内过程的重要控制，从而影响沉积物传输速率和途径的空间和时间分布。 床形的摩擦成分被视为活跃，而不是被动的。 最终，这对渠道稳定性产生了重要的影响。 这项工作的关键方面是根据河流系统中可用的流体功率的拖累视图来评估沉积物传输过程。 将在科罗拉多州的绿河中收集一项详细研究速度，沉积物传输速率和底部配置的研究。 数据将在“本地”和“空间”框架内进行分析。 结果将产生对沉积物传输预测能力和床形存在场的新了解。