Integrated geophysical methods for enhanced site characterization

用于增强场地表征的综合地球物理方法

• 批准号: 122023-2008
• 负责人: Bentley, Laurence
• 金额: $ 2.19万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=451638
• 关键词: Integrated; geophysical; methods; enhanced; site

In order to manage groundwater resources and to remediate contaminated sites we need to characterize the distribution of geologic materials and the chemistry of soil and groundwater. However, the subsurface at many natural and contaminated sites is quite variable, and, because it is below the surface, quite difficult to characterize. Drilling boreholes has historically been the main tool for hydrogeologic site characterization. However, borehole data is located at a limited number of subsurface profiles and drilling is intrusive so it must be done with care at contaminated sites. The sparseness of the sampling can lead to an ambiguous or incorrect understanding of the subsurface. On the other hand, geophysical data can provide relatively inexpensive data that samples a much more continuous region of the subsurface. Often, geophysical data can be correlated to geologic formations, water quality and groundwater flow. Consequently, geophysical data has the potential to provide spatially dense information that can be used to dramatically improve our understanding of the subsurface. Indeed, geometrically complex sites cannot be properly characterized without spatially dense information and geophysical data can add information that allows reliable interpretations that are impossible with borehole data alone. The objective of this study is to develop practical methods for using multiple geophysical methods to improve our ability to characterize the subsurface. In particular, we are trying to take new, advanced methods that have been proposed in the research literature and make them effective for the real world consulting environment.

为了管理地下水资源和修复受污染的场地，我们需要描述地质材料的分布以及土壤和地下水的化学性质。然而，在许多自然和污染场地的地下是相当可变的，而且，因为它是在表面之下，很难定性。钻孔历来是水文地质场地表征的主要工具。然而，钻孔数据位于有限数量的地下剖面，并且钻探是侵入性的，因此在污染场地必须小心进行。采样的稀疏可能导致对地下的模糊或不正确的理解。另一方面，地球物理数据可以提供相对便宜的数据，其对地下的更连续的区域进行采样。通常，地球物理数据可以与地质构造、水质和地下水流相关联。因此，地球物理数据有可能提供空间密集的信息，可用于显着提高我们对地下的理解。实际上，如果没有空间密集的信息，就不能正确地描述几何形状复杂的场地的特征，而地球物理数据可以增加信息，从而能够进行可靠的解释，而这是单独使用钻孔数据不可能做到的。本研究的目的是开发实用的方法，使用多种地球物理方法，以提高我们的能力，表征地下。特别是，我们正在努力采取新的，先进的方法，已提出的研究文献，使他们有效的真实的世界咨询环境。