Collaborative Research: The Origin of Natural Levees

合作研究：天然堤坝的起源

• 批准号: 9811861
• 负责人: Norman Smith
• 金额: $ 8.34万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9811861&HistoricalAwards=false
• 关键词: Collaborative; Research; Origin; Natural; Levees

9811861SmithThis study will examine the origin, evolution morphological and sedimentological characteristics of natural levees in alluvial floodplains, concentrating on the upper Columbia River near Golden, British Columbia, and the Saskatchewan River at the Cumberland Marshes, eastern Saskatchewan. Despite common depictions of levees as being relatively simple features, they are quite complex, displaying a wide range of sizes, shapes, slopes, and textural attributes that likely reflect controls of channel and floodplain configurations, channel history, sediment load, flood character and flood history. This three-part investigation will include (1) measurement and analysis of morphometric parameters of levees, (2) hydraulic field measurements and mathematical modeling of modern levee formation, and (3) sedimentological investigations of levee deposits, focusing on the question of what can be inferred about channel history and evolutionary patterns of levees from their deposits. The results of this project are expected to (i) permit testing of a proposed conceptual model for the development and growth of natural levees concurrently with the evolution of channels following avulsion in river floodplains, (ii) provide a clearer sense of the relative importance of diffusive and adjective mechanisms of channel-to-floodplain sediment transfer during different stages of levee development, and (iii) result in a better understanding of levee deposits and their relative importance in successions of alluvial sediments.

9811861史密斯这项研究将研究冲积洪泛区中自然堤防的起源，进化形态和沉积学特征，集中在萨斯喀彻温省东部坎伯兰群岛的坎伯兰郡坎伯兰郡坎伯兰郡的金登河附近的上哥伦比亚河上。 尽管堤防是相对简单的特征，但它们非常复杂，表现出各种尺寸，形状，斜率和纹理属性，这些尺寸可能反映了渠道和洪泛区配置的控制，频道历史，沉积物负载，洪水特征和洪水历史。 这项三部分的研究将包括（1）测量和分析堤防的形态计量参数，（2）现代堤防形成的水力现场测量和数学模型，以及（3）堤防沉积物的沉积学研究，重点介绍有关其沉积物的渠道历史和进化模式可以推断出的问题的问题。 The results of this project are expected to (i) permit testing of a proposed conceptual model for the development and growth of natural levees concurrently with the evolution of channels following avulsion in river floodplains, (ii) provide a clearer sense of the relative importance of diffusive and adjective mechanisms of channel-to-floodplain sediment transfer during different stages of levee development, and (iii) result in a better understanding of levee deposits and their relative importance in冲积沉积物的继承。