| 项目编号: | 1519221
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| 项目名称: | Collaborative Research: Electromagnetic Induction in Geological Formations: A Careful Evaluation of the Subdiffusion Perspective |
| 作者: | Chester Weiss
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| 承担单位: | University of New Mexico
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| 批准年: | 2013
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| 开始日期: | 2014-08-10
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| 结束日期: | 2017-05-31
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| 资助金额: | USD20834
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | electromagnetic geophysics
; electromagnetic induction
; electromagnetic datum
; careful evaluation
; corresponding classical electromagnetic simulation
; electromagnetic field
; geological formation
; fmr
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| 英文摘要: | Team 1
Proposal Number: 09-43598
Principal Investigator: Weiss, Chester; 540-231-3651; cjweiss@vt.edu
Institution: Virginia Tech
Team 2
Proposal Number: 09-43589
Principal Investigator: Everett, Mark; 979-862-2129; everett@geo.tamu.edu
Institution: Texas A&M
Title: Electromagnetic Induction in Geological Formations:
A Careful Evaluation of the Subdiffusion Perspective
ABSTRACT
While controlled-source electromagnetic geophysics has been often hailed as a potential breakthrough technology for subsurface hydrology, the current reality is that hydrogeologists often experience severe difficulties in interpreting electromagnetic data. In simple cases, where the electrical properties of the subsurface are reasonably approximated by a smooth or piecewise-constant distribution, classical geophysical methods of low-frequency electromagnetic induction are useful in constraining our knowledge of the hydrologic system. However, in cases where the setting is more complicated ? for instance, where the subsurface is characterized by length-scale-dependent heterogeneity ? the classical methods of electromagnetic induction must be modified accordingly. A promising analytic approach uses the historical methods of fractional calculus to accommodate scale-dependent lithologic complexity in the governing Maxwell Equations. Through a systematic study of the fractional Maxwell response (FMR) and corresponding classical electromagnetic simulations of appropriate complexity, we aim to illuminate geological settings where the FMR is present and to interpret the FMR in terms of hydrologic parameters such as porosity, clay content, pore water salinity, fracture density, position of a saline wedge or contaminant zone, etc. The technical innovation of our current proposal is based on extending traditional electromagnetic geophysics into new territory with the development of anomalous diffusion of electromagnetic fields into scale-dependent geological media. The broad sweep of electromagnetic geophysics, both traditional and innovative, must however be better communicated to the hydrological community. Accordingly we plan to utilize the newly developed virtual institute ?OpenEM.org? as a platform to better engage the hydrologic community in the application of electromagnetic geophysics.
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| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96047
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Chester Weiss. Collaborative Research: Electromagnetic Induction in Geological Formations: A Careful Evaluation of the Subdiffusion Perspective. 2013-01-01.
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