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Qualitative Hydraulics and Transport from Strata and Dynamics of Sandy Bedforms

地层定性水力学和输送以及砂地层动力学

基本信息

批准号：
1632938
负责人：
Brandon McElroy
金额：
$ 26.06万
依托单位：
University of Wyoming
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-08-01 至 2020-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1632938&HistoricalAwards=false
关键词：
Qualitative Hydraulics Transport Strata Dynamics

项目摘要

Bed forms, ripples and dunes, are key indicators of water flow and sediment transport in sandy rivers, and therefore they are vital to understanding river management, coastal restoration, and surface water reservoir sedimentation. Additionally, they leave deposits that are a record of the ancient river conditions that create sedimentary rocks. These deposits can be used to determine the conditions of formation of subsurface reservoirs for water and hydrocarbons. To date, almost ubiquitously, models applied to bed form problems have used constant geometries representing bed forms that migrate to move sediment and create strata. This is in stark contrast to models of river processes that capture the dynamic nature of Earth's surface environments.This project will test a set of hypotheses derived by applying a dynamic model of bed form behavior to problems in 1) sediment transport mechanics, 2) bed material sediment flux, and 3) generation of fluvial stratigraphy. This will be accomplished through a suite of laboratory experiments, and relationships developed in these experiments will then be applied to interpreting ancient fluvial strata. The results of this project will benefit modern river planning, subsurface reservoir modeling, understanding of Earth's natural history, and the applied problems associated with these topics.

河床形态、沙纹和沙丘是桑迪河流水流和泥沙输运的关键指标，因此它们对于理解河流管理、海岸恢复和地表水水库沉积至关重要。此外，它们留下的沉积物是古代河流条件的记录，这些条件创造了沉积岩。这些沉积物可用于确定水和烃的地下储层的形成条件。到目前为止，几乎无处不在，应用于床形问题的模型使用恒定的几何形状表示床形迁移移动沉积物和创建地层。这与捕捉地球表面环境的动态性质的河流过程模型形成鲜明对比。本项目将测试通过将床形行为的动态模型应用于以下问题而得出的一系列假设：1）沉积物输运力学，2）床物质沉积通量，3）河流地层的生成。这将通过一套实验室实验来完成，在这些实验中开发的关系将被应用于解释古河流地层。该项目的结果将有利于现代河流规划，地下储层建模，地球的自然历史的理解，以及与这些主题相关的应用问题。