ENGINEERING GEOLOGY AND ROCK FRACTURE FLOW TRANSPORT OF TOXIC CHEMICALS

工程地质与有毒化学品的岩石破裂流输运

• 批准号: 3777182
• 负责人: HERBERT H EINSTEIN
• 金额: --
• 依托单位: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3777182
• 关键词: computer program /software; computer simulation; data collection; environmental stressor; environmental toxicology; environmental transport; field study; fresh water environment; ground water; industrial waste; mathematical model; model design /development; soil; toxicant interaction; water flow; water pollution

Flow of contaminated groundwater and its interaction with the ground occurs both in soil and rock. Prediction of contaminant transport and transformation is very important in planning of remedial and preventive measures and requires suitable transport and transformation models. Evidence exists in many areas of this country that substantial groundwater flow occurs in fractured rock underlying the soil; this is particularly so in the Aberjona Valley where contaminated groundwater has been found in the rock fractures. Predicting the potential contaminant transport requires fracture flow models. The present status of fracture flow models is unsatisfactory in that they are often based on unrealistic geometries, in that neither extensive parametric simulation nor field studies have been conducted and that, as a consequence, the range of applicability of continuum models is not known. The proposed three-year research has two major components. 1. It will characterize the soil and rock formation in the Aberjona Valley to provide the information for developing fracture flow models. This engineering geologic characterization is also an essential basis for most other Core B research projects. Data collection has started and will continue. In addition to the Superfund exploration wells, many other borings and surface exposures will be used for this purpose. A computer program for 3-d representation and manipulation of this data will also be developed. 2. It will develop geometric fracture system models, geometric and flow models of individual fractures, and it will then combine the geometric fracture system - and individual fracture models in fracture flow models. The fracture flow model representing flow in fractured masses will be first used to conduct computer simulations to determine which parameters and parameter states are significant; it will also be used to find the application limits between discrete fracture models and equivalent porous media models. All this will be done in the context of the Aberjona aquifer and, consequently a field validation will be conducted which will be combined with the other projects of the Aberjona field study. The field tests will provide the basis of further research in which transportation and transformation models need to be developed.

受污染地下水的流动及其与地面的相互作用 存在于土壤和岩石中。 污染物迁移预测 转型对于补救和预防规划非常重要 措施并需要合适的运输和转换模型。 有证据表明，该国许多地区存在大量地下水 流动发生在土壤下面的裂隙岩石中；尤其如此 在阿伯霍纳山谷 (Aberjona Valley) 发现了受污染的地下水 岩石裂缝。 预测潜在的污染物迁移 需要裂缝流模型。 裂缝流模型的现状 并不令人满意，因为它们通常基于不切实际的几何形状， 因为广泛的参数模拟和现场研究都没有 已进行，因此，适用范围 连续介质模型尚不清楚。 拟议的为期三年的研究有两个主要组成部分。 1. 会的 描述阿伯霍纳山谷的土壤和岩层特征，以提供 用于开发裂缝流模型的信息。 本工程 地质特征也是大多数其他核心的重要基础 B 研究项目。数据收集已经开始并将继续进行。 在 除了超级基金勘探井外，还有许多其他钻孔和 表面曝光将用于此目的。 一个计算机程序用于 还将开发该数据的 3D 表示和操作。 2. 开发几何裂缝系统模型、几何模型和流动模型 单个裂缝的模型，然后它将结合几何 裂缝系统 - 以及裂缝流动模型中的单个裂缝模型。 代表裂缝体中流动的裂缝流动模型将是 首先用于进行计算机模拟以确定哪些参数 且参数状态显着；它还将用于查找 离散断裂模型和等效多孔模型之间的应用限制 媒体模型。 所有这一切都将在 Aberjona 的背景下完成 含水层，因此将进行现场验证，这将 与阿伯霍纳实地研究的其他项目相结合。 这 现场测试将为进一步研究提供基础 需要开发运输和转型模型。