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Citations since 2016
14 Research Items
I'm an early-career near-surface geophysicist. I utilize electric and electromagnetic geophysical methods (ground penetrating radar (GPR), electromagnetic induction (EMI), electric resistivity (ER)) to characterize groundwater properties and processes. My research thus far has incorporated field data, numerical model data, and inversion solutions to make interpretations about critical zone/shallow subsurface phenomena.
January 2019 - present
- PostDoc Position
- Performing geophysical surveys at historic cemeteries to 1) document/confirm known and unknown burials, 2) contribute to the archaeological data of the site, 3) develop processing workflow specifically for archaeometry work.
This study investigates hydrogeologic controls on a peculiar, poorly studied type of geographically isolated wetland in west-central Florida, USA, locally referred to as “sandhill” (or “xeric”) wetlands. Their peculiarity lies in their connectivity to a large regional aquifer, which controls their hydrology. Evidence for this connectivity was prese...
Sinkhole processes can be more complicated than vertical drainage or collapse of sediments into an underlying limestone void. To better understand the relationships between surface and underlying karst structures, geodetic and geophysical methods were applied to high-resolution mapping of active sinkhole features in covered karst, west-central Flor...
Sharpening ground-penetrating radar (GPR) images remains a persistent challenge. Two approaches in particular—singular value decomposition (SVD) and sparse blind deconvolution (SBD)—have been shown to effectively denoise GPR images and resolve a reflectivity model, respectively. To our knowledge, these approaches have not been used to process GPR d...
This study investigates hydrogeologic controls on a peculiar, poorly studied type of geographically isolated wetland in west-central Florida, USA, locally referred to as “sandhill wetlands.” Their peculiarity lies in their connectivity to a large, regional aquifer, which controls their hydrology and influences their ecological expression. Six wetla...
Ground-penetrating radar (GPR) and terrestrial laser scanning (TLS) surveys were conducted at a historic cemetery at Cape Canaveral Air Force Station, Florida, U.S., in order to confirm the presence of burials corresponding to grave markers and detect potential unmarked burials. Noise in the GPR data from surface features and subtle terrain differe...
Text: 3D GPR surveys in the covered karst terrain of west-central Florida, USA, reveal surprising geometries of surficial sediments. Several meters of surficial sands overlie progressively more clay-rich sediments, which in turn overlie weathered limestone. The top of a clay-rich horizon produces an exceptionally clear GPR reflector visible from de...
Aeromagnetic surveys over the Amargosa Desert, Nevada, have revealed the presence of several magnetic anomalies that have been interpreted to be caused by buried volcanoes; many of these anomalies have been confirmed by drilling. We present data collected from a high-resolution, ground-based magnetic survey over Anomaly B, the largest of these anom...
Located 25 kilometers east of Flagstaff, Arizona, Rattlesnake Crater is an oblong phreatomagmatic feature in the San Francisco Volcanic Field. The shallow crater is approximately 1.4 kilometers at its widest point, and surrounded by an uneven tuff ring which is overlapped by a scoria cone volcano on the southeastern side. Improved understanding of...
I am processing GPR data and notice that the same diffractions in a given profile coorespond to different velocities depending on whether I am using GPR-SLICE or ReflexW. In both programs, I fit a hyperbola to diffractions to determine the velocities. We are talking 0.1 m/ns difference! Any ideas why?
I am conducting a series or geophysical surveys in a mangrove/wetland environment and need some solid background knowledge. Could anyone point me in the right direction? Mangrove forests/root involvement in hydrogeology processes/coastal wetland/tidal pushing, for examples. Thank you.
Confirm the presence of buried features beneath original grave markers. Potentially identify unmarked buried features. Integrate terrestrial lidar point cloud data with GPR data for point cloud manipulation.