Collaborative Research: Critical Assessment of Coupled Flow Behavior in Unsaturated Clay Barriers

合作研究：非饱和粘土屏障中耦合流动行为的批判性评估

• 批准号: 0926205
• 负责人: Charles Shackelford
• 金额: $ 22.83万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-15 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926205&HistoricalAwards=false
• 关键词: Collaborative; Research; Critical; Assessment; Coupled

This project seeks to advance the state of the art as it relates to modeling and evaluating coupled unsaturated flow in waste containment systems. Such systems are vital to securing nuclear, hazardous and municipal waste throughout the country. If successful, the new models will address behavior that is currently unaccounted for and approximated with physically inaccurate simplifications. The collaboration strategically leverages the strengths at each institution to address experimental and theoretical objectives. The goal of this research is to evaluate the existence and significance of chemico-osmosis and membrane behavior in unsaturated clays. A collaborative experimental and theoretical approach will be employed to achieve this goal. The overall objectives are: (1) to develop and evaluate an innovative apparatus for measuring membrane behavior and quantifying coupled fluid and chemical transport in unsaturated clays; (2) to clarify the direct and coupled driving forces governing fluid and chemical fluxes; (3) to measure governing parameters on unsaturated soils under conditions representing practical problems; (4) to develop a model for solute transport under unsaturated conditions that incorporates membrane behavior, and (5) to quantify the importance of coupling as a function of the degree of saturation and solute concentration in soils typical of barrier materials

该项目旨在推进最先进的技术，因为它涉及到模拟和评估耦合不饱和流在废物容纳系统。这些系统对于确保全国各地的核废物、危险废物和城市废物的安全至关重要。如果成功，新模型将解决目前无法解释的行为，并近似于物理上不准确的简化。这种合作战略性地利用了每个机构的优势，以解决实验和理论目标。本研究的目的是评估化学渗透和膜行为在非饱和粘土中的存在和意义。一个合作的实验和理论的方法将被用来实现这一目标。总体目标是：（1）开发和评估一种用于测量非饱和粘土中膜行为和定量耦合流体和化学输运的创新装置;（2）阐明控制流体和化学通量的直接和耦合驱动力;（3）测量代表实际问题的条件下非饱和土壤的控制参数;（4）建立一个包含膜行为的非饱和条件下溶质运移模型，（5）量化耦合的重要性，作为典型屏障材料土壤中饱和度和溶质浓度的函数