Quantifying salinity in the layered coastal aquifers underlying and adjacent to Delaware Bay USA using AEM-derived resistivity

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Abstract

Airborne electromagnetic (AEM) methods are particularly well suited to coastal aquifer salinity studies, yet the quantitative translation from bulk resistivity to fluid salinity carries uncertainty that can impact mapped salinity distributions and interpretations of the freshwater-saline interface and hydrostratigraphic layers. A recent AEM survey of the region near the Delaware Bay, USA highlights several challenges common to coastal hydrogeologic settings that may influence both qualitative and quantitative interpretation. We use a Bayesian inversion to estimate geophysical parameter uncertainty, and results are integrated with hydrogeologic measurements to develop quantitative interpretations of salinity across the freshwater-saline interface in stacked aquifers.

Suggested Citation

Ball, L.B., Minsley, B.J., Wilson, G., Michael, H.A., Burns, D.A., Nardi, M.R., and Charles, E.G., 2023, Quantifying salinity in the layered coastal aquifers underlying and adjacent to Delaware Bay USA using AEM-derived resistivity, 8th International Airborne Electromagnetics Workshop (AEM2023), v. 2, Fitzroy Island, Australia, September 4-7, 2023, 4 p., https://doi.org/10.5281/zenodo.10052454.

Study Area

Publication type Conference Paper
Publication Subtype Conference Paper
Title Quantifying salinity in the layered coastal aquifers underlying and adjacent to Delaware Bay USA using AEM-derived resistivity
DOI 10.5281/zenodo.10052454
Volume 2
Publication Date October 30, 2023
Year Published 2023
Language English
Publisher Australian Society of Exploration Geophysicists
Contributing office(s) Crustal Geophysics and Geochemistry Science Center, New Jersey Water Science Center, New York Water Science Center, Geology, Geophysics, and Geochemistry Science Center, Maryland-Delaware-District of Columbia Water Science Center
Description 4 p.
Conference Title 8th International Airborne Electromagnetics Workshop (AEM2023)
Conference Location Fitzroy Island, Australia
Conference Date September 4-7, 2023
Country United States
State Delaware, New Jersey
Other Geospatial Delaware Bay
Additional publication details