Collaborative Research: Anabranching Channels in Jointed Bedrock: An Integrated Flume and Field Study

合作研究：节理基岩中的分支通道：综合水槽和现场研究

• 批准号: 0228876
• 负责人: Gregory Springer
• 金额: --
• 依托单位: Ohio University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-04-01 至 2006-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0228876&HistoricalAwards=false
• 关键词: Collaborative; Research; Anabranching; Channels; Jointed

0228876SpringerOur primary research objective is to quantitatively describe the interplay of the processes and rates of change in bedrock channels formed on jointed, resistant rock with particular reference to anabranching rivers. An anabranching river reach has multiple channels that branch and rejoin and are separated by surfaces that are dry or rarely flooded. We will use flume experiments and field studies of the Orange River in South Africa to explore the relationship of channel geometry developed on jointed, resistant rock to sediment discharge, lithology, tectonic regime, and joint spacing. The flume experiments and fieldwork will allow us to determine the conditions under which anabranching bedrock channels form and persist. Multiple substitutions of variables, accomplished by space substitution in the field and run design in the flume, will allow us to directly infer the relative influences of each variable.By conducting a systematic examination with experimental and field studies, we will increase our ability to establish cause and effect. This will benefit studies of bedrock rivers in general by directly contributing to the ability to parameterize bedrock channel processes, and ultimately the ability to model landscape evolution. Furthermore, we will use this project as an opportunity to train young scientists and to foster scientific and cultural exchange between South Africa and the United States. Graduate students will be integral parts of the research program and we will work collaboratively with colleagues in South Africa and from Wales. The graduate students will gain important scientific and cultural knowledge, we will gain valuable international experience, and our South African and Welsh colleagues will gain international exposure through our work

0228876我们的主要研究目标是定量描述在节理、抗压岩石上形成的基岩渠道中的过程和变化速度的相互作用，特别是参考分支河流。一条支流河段有多条分流和重新汇合的渠道，并被干燥或很少被洪水淹没的表面隔开。我们将利用水槽实验和南非奥兰治河的实地研究，探索节理、抗压岩石上发育的河道几何形状与泥沙流量、岩性、构造制度和节理间距的关系。水槽实验和实地考察将使我们能够确定分流基岩渠道形成和持续的条件。通过现场空间替代和水槽运行设计实现变量的多重替代，将使我们能够直接推断每个变量的相对影响。通过进行系统的试验和现场研究，我们将提高确定因果关系的能力。这将有助于对基岩河流的总体研究，因为它直接有助于基岩河道过程的参数化，并最终有助于模拟地貌演变。此外，我们将利用这个项目作为培训年轻科学家的机会，并促进南非和美国之间的科学和文化交流。研究生将是研究项目不可或缺的一部分，我们将与南非和威尔士的同事合作。研究生将获得重要的科学和文化知识，我们将获得宝贵的国际经验，我们的南非和威尔士同事将通过我们的工作获得国际视野