Integrating Biogeophysics into a Hydrogeology Course Teaching Hydrogeology, Soils, and Low-T...
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Integrating Biogeophysics into a Hydrogeology Course Teaching Hydrogeology, Soils, and Low-T Geochemistry in the 21st Century University of New Mexico,
Integrating Biogeophysics into a Hydrogeology Course Teaching
Hydrogeology, Soils, and Low-T Geochemistry in the 21st Century
University of New Mexico, Albuquerque, NM June 4-9, 2013 Todd
Halihan, Ph.D., P.Gp. Oklahoma State University / Aestus, LLC
Slide 2
1. Not training a geophysicist, training interpreter 2. Some
things dont work everywhere 3. Electrical methods probably most
useful and teachable 4. QA/QC protocols 5. Data Integration is key
(evidence-based)
Slide 3
You gotta be kidding: 10,000 wells Massachusetts Military
Reservation, Cape Cod, MA The Problem
Slide 4
The Solution: Scan First X-ray of Skull 3-D Seismic Image of
Oil Reservoir
Slide 5
Geophysical data can provide dense datasets as a framework for
other samples Students can understand variability and scale
issues
Slide 6
56 small electrode stakes 2 - 4 images per day Image size =
5L:1D Setting Up The Camera
Slide 7
Typical Electrical Properties (Resistivity in ohm-meters) Salt
Water Clay/Silt Sand/Rock Dissolved Phase Free/Residual NAPLs
Bioactivity Less Electrically Resistive (More Electrically
Conductive) More Electrically Resistive (Less Electrically
Conductive)
Slide 8
ERI of a dry Oklahoma granite (point data)
Slide 9
Picture of wet Oklahoma sand (line data)
Slide 10
Granite Sandstones Dailey, 2011
Slide 11
modified from Harvey et al, 2009 Saline? Marsh
Slide 12
Resistive, FRESH Conductive, DEGRADED Modified from Che Alota
et al, 2009
Slide 13
Fresh ResistorDegraded Conductor
Slide 14
Evidence-based Data Integration: Boones Dry Cleaners, Jackson,
TN
Slide 15
dry cleaners ~ 1945 to 1977 TCE and PCE welding shop until 2003
when a tornado destroyed the building A mixture of corn syrup,
Simple Green, and vegetable oil was injected into a series of wells
every 2 weeks between May - August 2002 A one time injection of
soybean oil was made in Dec 2002 Soil excavated from the source
area - 2004. Pit was sprayed with sodium lactate before being
filled Aestus scanned site - April 2009 Solvent Site History
Slide 16
Slide 17
Injection Hydraulics, Microbial Ecology
Slide 18
Slide 19
DNAPL degradation, Microbial Effects
Slide 20
Depth Slices for Injection Evaluation Vadose Zone Phreatic
Zone
Slide 21
Can set up range of exercises, either alone or sequentially 1.
How to sample DNAPL impacted area 2. Effects of mixed waste plume
on chemistry 3. Biogeochemistry of impacted sites 4. Hydraulics of
injection remediation