Solute Transport with Convective Instability in Groundwater

地下水中对流不稳定的溶质输运

• 批准号: 9017504
• 负责人: Frank Schwartz
• 金额: --
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9017504&HistoricalAwards=false
• 关键词: Solute; Transport; Convective; Instability; Groundwater

This is a three-year experimental, theoretical and field study of convective instability and its role in solute mixing during mass transport. Instabilities can develop at different scales under a variety of geologic and hydrogeologic situations when more dense groundwater overlies less dense groundwater. The process mixes the two waters to reduce the density stratification. The specific objectives of the study are to describe the dynamics of instability development both conceptually and mathematically and to evaluate the potential for instability development to influence the chemical evolution of groundwater in large flow systems. The study includes both experiments and the evaluation of an actual groundwater system, the Milk River artesian aquifer, in which unstable mixing has a significant potential for influencing the chemical evolution of the water. The laboratory work will involve a series of precisely controlled and monitored flow tank studies designed to describe the dynamics of the mixing process. The field study will involve a detailed characterization of the geology and hydrogeology of the Milk River aquifer, followed by an evaluation with a variable density model. This study will contribute basic knowledge about a relatively unknown and poorly understood process. Previous studies show that mixing due to instability development can be more important than commonly realized. The work is of practical and academic importance to problems of solvent-enhanced oil recovery, chemical mixing in sedimentary basins and contaminant migration.

这是一项为期三年的实验、理论和实地研究， 对流不稳定性及其在质量期间溶质混合中的作用 运输 不稳定性可以在不同的尺度下发展， 各种地质和水文地质情况时，更密集 地下水覆盖密度较小的地下水。 该过程混合 两种沃茨的密度分层减少。 的 研究的具体目标是描述 在概念上和数学上不稳定性发展， 评估不稳定发展的可能性， 影响大流量地下水化学演化 系统. 本研究包括实验和评价两部分 一个真实的地下水系统，牛奶河自流含水层， 其中不稳定的混合有很大的潜力， 影响水的化学演化。 实验室 这项工作将涉及一系列精确控制和监测， 流动罐研究，旨在描述混合动力学 过程 实地研究将涉及详细的 牛奶的地质和水文地质特征 河流含水层，然后进行变密度评价 模型 这项研究将有助于基本知识， 这是一个相对未知和知之甚少的过程。 先前 研究表明，由于不稳定发展而导致的混合可能会 比通常意识到的更重要。 该工作具有实用性 对溶剂强化油问题具有重要的学术意义 沉积盆地中的化学混合和污染物 迁移