Demonstration of a Fractured Rock Geophysical Toolbox (FRGT) for Characterization and Monitoring of DNAPL Biodegradation in Fractured Rock Aquifers
[Technical Report, Final Report]
Department of Earth/Environmental Science
Pagination or Media Count:
The overall objective of this project is to demonstrate a method for characterization and monitoring of dense non-aqueous phase liquid DNAPL biodegradation including free and dissolved phase in fractured rock aquifers based on a fractured rock geophysical toolbox FRGT. Specific technical objectives include demonstrations of 1 fracture network characterization using geophysical methods sensitive to fracture strike and dip patterns and spanning a wide range of measurement scales 2 long-term, minimally invasive autonomous monitoring of proxies of the timing and extent of amendment delivery andor DNAPL degradation in fractured rock using combined geophysical and geochemical measurements sensitive to biodegradation 3 the application of informed inversion to produce estimates of fracture location, distribution, and orientation with better resolution than is currently possible with commercially available tools and 4 identification and monitoring of geophysical attributes that are soft measures of progress of DNAPL biodegradation in fractured rock. The project team aims to demonstrate how such geophysically imaged soft hydrological information can be used to guide decisions regarding sampling frequency and duration. This effort will include comparison of dense 4D geophysical monitoring results with sparser in time and space point chemistry data in order to fully understand geophysical signatures of DNAPL amendment treatments and remediation processes.
- Geology, Geochemistry and Mineralogy