Sediment Transport and Fluvial Bedrock Erosion in an Evolving Mountain Belt: A Field Study

演化山带中的沉积物输送和河流基岩侵蚀：实地研究

• 批准号: 9903196
• 负责人: Rudy Slingerland
• 金额: $ 16.6万
• 依托单位: Pennsylvania State Univ University Park
• 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: 1999-08-01 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9903196&HistoricalAwards=false
• 关键词: Sediment; Transport; Fluvial; Bedrock; Erosion

9903196SlingerlandThe objective of this research is to conduct a field test to better define the mechanisms of bedrock erosion occurring in streams draining the Central Range of Taiwan, and to quantify the amount of bedrock erosion as a function of stream hydraulic and sediment transport variables. In order to accomplish this goal we must measure bedload transport rates at selected field sites in the study area. Therefore a secondary goal is to apply the passive acoustic technique of Thorne and colleagues, developed under marine conditions, to measure bedload transport in these steep mountain streams. To our knowledge it is afirst attempt at this effort. The result will be a dataset of bedrock wear rates as a function of local sediment fluxes and other important variables such as intrinsic bedrock erodibility, channel hydraulics, and grain size of the material in transport. This dataset will be used to test theoretical derivations, with the ultimate goal a process-based, field calibrated fluvial bedrock incision law.

[9903196slingerland]本研究的目的是通过实地试验，更好地界定台湾中部山脉流域的基岩侵蚀机制，并量化基岩侵蚀量作为河流水力和输沙变量的函数。为了实现这一目标，我们必须在研究地区选定的实地地点测量层质输送率。因此，第二个目标是应用索恩和他的同事在海洋条件下开发的被动声学技术来测量这些陡峭山涧中的河床搬运。据我们所知，这是这方面的第一次尝试。结果将是一个基岩磨损率的数据集，该数据集是当地沉积物通量和其他重要变量（如基岩固有可蚀性、河道水力学和运输中物质的粒度）的函数。该数据集将用于测试理论推导，最终目标是基于过程的、现场校准的河流基岩切割规律。