Resistivity imaging reveals complex pattern of saltwater intrusion along Monterey coast

Goebel, Meredith; Pidlisecky, Adam; Knight, Rosemary

doi:10.1016/j.jhydrol.2017.02.037

Cited by 115 publications

(38 citation statements)

References 26 publications

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“…Remarkable new data sets can now be collected. The latest land‐based measurement systems can reach to nearly 300 m below sea level and stretch tens of kilometers along the coastline [ Goebel et al ., ]. Airborne methods provide data of unprecedented resolution over vast areas [ Siemon et al ., ].…”

Section: Scientific Progressmentioning

confidence: 99%

Science, society, and the coastal groundwater squeeze

Michael

Post

Wilson

et al. 2017

Water Resources Research

202

105

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Coastal zones encompass the complex interface between land and sea. Understanding how water and solutes move within and across this interface is essential for managing resources for society. The increasingly dense human occupation of coastal zones disrupts natural groundwater flow patterns and degrades freshwater resources by both overuse and pollution. This pressure results in a “coastal groundwater squeeze,” where the thin veneers of potable freshwater are threatened by contaminant sources at the land surface and saline groundwater at depth. Scientific advances in the field of coastal hydrogeology have enabled responsible management of water resources and protection of important ecosystems. To address the problems of the future, we must continue to make scientific advances, and groundwater hydrology needs to be firmly embedded in integrated coastal zone management. This will require interdisciplinary scientific collaboration, open communication between scientists and the public, and strong partnerships with policymakers.

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Section: Scientific Progressmentioning

confidence: 99%

Science, society, and the coastal groundwater squeeze

Michael

Post

Wilson

et al. 2017

Water Resources Research

202

105

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“…Electrical resistivity tomography (ERT) is a geophysical approach based on resistivity contrast, used to determine earth resistivity distribution on the sub-surface. Because of the large electrical resistivity contrast between seawater (0.2 Ωm) (Nowroozi et al 1999) and freshwater (> 10 Ωm); resistivity methods make it possible to map the subsurface groundwater salinity distribution (Maillet et al 2005;Batayneh 2006;Martinez et al 2009;Mario et al 2011;Zarroca et al 2011;Rey et al 2013;Werner et al 2013;Eissa et al 2016;Kazakis et al 2016;Goebel et al 2017;Najib et al 2017).…”

Section: Methodsmentioning

confidence: 99%

Contribution of geophysics to geometric characterization of freshwater–saltwater interface in the Maâmoura region (NE Tunisia)

Chabaane

Redhaounia

Gabtni

et al. 2018

Euro-Mediterr J Environ Integr

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The Maâmoura aquifer is located on the eastern coast of the Cap Bon peninsula. During recent decades, the agricultural exploitation of water has been strongly reinforced, causing an over-pumping of the groundwater resources accompanied by an intrusion of seawater. The geophysical approach based on electrical resistivity tomography has been adopted to obtain high-resolution electrical sections imaging, which allows delineatation of the areas characterized by a high salinization and reconstructs the geometry of the saline wedge front. In fact, the presence of seawater in the aquifers reduces subsurface resistivity values. In this study, five electrical profiles were performed using the Terrameter SAS4000 Lund Imaging System with an array of 64 electrodes. The Wenner configuration was used with a unit electrodes spacing of 5 m. Finally, we use hydrogeological data, and electrical resistivity tomography data superimposed with the location of wells to provide a conceptual framework for the understanding of the freshwater-saltwater interface in the Maâmoura region.

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“…Mohd Muzamil et al [9] used ERT to determine seawater intrusion in coastal aquifer, and confirmed that the profile of seawater intrusion can effectively be investigated through ERT. Goebel et al [10] demonstrated the value of spatially continuous information derived from long-offset ERT data when used in conjunction with traditional data sets for understanding the distribution of freshwater and seawater.…”

Section: Electrical Resistivity Tomographymentioning

confidence: 99%

Evaluating the Application of Electrical Resistivity Tomography for Investigating Seawater Intrusion

et al. 2018

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Seawater intrusion is a major issue in coastal areas, and the traditional technology of investigation mainly makes use of drilling for water level observation and sample analysis of groundwater; as drilling data is an information of points, it will cost more if it is extended to be information on the surface. Non-destructive geophysical exploration technology has been used in the investigation of the underground environments at all kinds of contaminated sites in recent years. Seawater intrusion is also a groundwater pollution situation, and "Surface and Space" information can be obtained with a small amount of drilling data. This research will use Electric Resistivity Tomography as a geophysical exploration technology to assess the situation at the interface of seawater intrusion and to explore the dynamic changes of seawater intrusion through long-term monitoring. The test site of this research is situated in the seawater intrusion area along Kinmen Island. The research results showed that the front edge of the seawater intrusion could be detected with Electric Resistivity Tomography, and a delay effect existing between seawater intrusion and tidal action was observed by means of Time-lapse. If a long-term observation system is established in future, it could contribute to the confrontation of seawater intrusion and salinization phenomena.

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Resistivity imaging reveals complex pattern of saltwater intrusion along Monterey coast

Cited by 115 publications

References 26 publications

Science, society, and the coastal groundwater squeeze

Science, society, and the coastal groundwater squeeze

Contribution of geophysics to geometric characterization of freshwater–saltwater interface in the Maâmoura region (NE Tunisia)

Evaluating the Application of Electrical Resistivity Tomography for Investigating Seawater Intrusion

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