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.

作者声明：T.南加州 这项研究是针对一个更好的理解河道内的过程响应相互作用。 具体来说，将研究底部粗糙度要素和沉积物输运率的空间分布和时间演变，特别关注反馈相互作用。 据推测，底形发挥重要的控制作用，在通道的过程，从而影响空间和时间分布的泥沙输运率和途径。 床型的主动组成部分被视为主动的，而不是被动的。 这最终对信道稳定性具有重要影响。 这项工作的关键方面是评估泥沙输运过程中的阻力分区的观点，在河流系统中可用的流体动力。 将在科罗拉多的绿色河中收集流速剖面、泥沙输移率和底部构型的详细研究。 将在“地方”和“空间”框架内分析数据。 其结果将对泥沙输移预报能力和底形存在场有新的认识。