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Journal articles
Mapping Coastal Aquifers by Joint Inversion of DC and TEM Soundings‐Three Case Histories
Abstract : Electrical and electromagnetic methods are well suited for coastal aquifer studies because of the large contrast in resistivity between fresh water-bearing and salt walter-bearing formations. Interpretation models for these aquifers typically contain four layers : a highly resistive unsaturated zone ; a surficial fresh water aquifer of intermediate resistivity ; an underlying conductive, salt water saturated aquifer ; and resistive substratum. Additional layers may be added to allow for variations in lithology within the fresh water and salt water layers. Two methods are evaluated : direct current resistivity and time domain electromagnetic soundings. Use of each method alone produces nonunique solutions for resistivities and/or thickness of the different layers. We show that joint inversion of vertical electric and time domain electromagnetic soundings produces a more tightly constrained interpretation model at three test sites than is produced by inversion methods applied to each data set independently.
https://hal.univ-reunion.fr/hal-02100557
Contributor : Réunion Univ <>
Submitted on : Tuesday, April 16, 2019 - 9:25:33 AM
Last modification on : Saturday, September 19, 2020 - 3:56:37 AM
Contributor : Réunion Univ <>
Submitted on : Tuesday, April 16, 2019 - 9:25:33 AM
Last modification on : Saturday, September 19, 2020 - 3:56:37 AM