Experimental Flume Study of Bedrock Incision by Abrasion: Interface Evolution

基岩磨损切割实验水槽研究：界面演化

• 批准号: 0439037
• 负责人: Kelin Whipple
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-01-01 至 2008-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0439037&HistoricalAwards=false
• 关键词: Experimental; Flume; Study; Bedrock; Incision

At orogen scale, rock uplift rates are strongly influenced by erosional efficiency, which is set by climatic conditions, bedrock quality, and the sediment load carried by rivers. And, river incision rates ultimately control regional denudation rates and patterns because rivers set the boundary condition for hillslope erosion. This project will develop and test process-specific models of river incision into bedrock. In particular, the quantitative relationships among bedrock properties, river sediment load (flux, size, sorting), flow hydrodynamics, and bed morphology remain important unknowns and support the conceptual framework that erosion rates depend on evolving feedbacks among bed topography, fluid flow, and sediment transport. A refined, physically reasonable, quantitative model of bedrock incision into bedrock will be developed to rationally interpret specific erosional morphologies observed in the field in terms of flow and sediment transport conditions. Preliminary experiments have been conducted in (SAFL, UMn) and a new flume to be constructed at MIT.

按照造山机量表，岩石上升速率受到侵蚀效率的强烈影响，侵蚀效率是由气候条件，基岩质量和河流承载的沉积物负荷设定的。 而且，河流切口率最终控制区域剥离率和模式，因为河流设定了山坡侵蚀的边界条件。该项目将开发和测试特定于河流切口的过程模型。特别是，基岩特性，河流沉积物负载（通量，大小，分类），流动流体动力学和床形态之间的定量关系仍然是重要的未知数，并支持侵蚀速率取决于床形图，流体流动和泥沙运输的反馈的概念框架。 将开发出基岩切口的精致，身体合理的定量模型，以合理地解释在流量和沉积物传输条件方面在田间观察到的特定侵蚀形态。已经在（Safl，UMN）和MIT构建的新水槽中进行了初步实验。