Evaluation of geoelectrical models efficiency for coastal seawater intrusion by applying uncertainty analysis

Amin Zeynolabedin, Reza Ghiassi, Reyhaneh Norooz, Saliha Najib, Ahmed Fadili

Research output: Contribution to journalArticlepeer-review

Abstract

Seawater intrusion (SWI) is one of the most important phenomena which occurs in shorelines and islands and affects groundwater storage in the region. This study aims to investigate how far seawater has intruded in a coastal area and what is its extent variation. The results can lead to different management plans. To achieve these goals, a geoelectrical method is applied in the coastal aquifer of Chaouia, Morocco. In order to choose the best inversion process, different settings are applied in two different software packages namely RES2DINV and BERT and the results are compared using the Taylor diagram. Also, to determine the minimum and maximum SWI extent in the region, a new approach of uncertainty analysis is applied in the inversion process by the Monte Carlo method. The general results indicate that the seawater has intruded about 2 km into the shore. The obtained results show that by considering uncertainty, there is a sensible difference between the maximum and minimum extent of SWI (maximum 9% variation in the area of SWI) which should be noted when doing water research management studies. The methodology procedure in this study can be applied to different coastal areas around the world.

Original languageEnglish
Article number127086
JournalJournal of Hydrology
Volume603
DOIs
Publication statusPublished - 2021 Dec 1

Subject classification (UKÄ)

  • Oceanography, Hydrology, Water Resources
  • Geotechnical Engineering

Free keywords

  • Chaouia
  • Electrical resistivity tomography
  • Monte Carlo
  • Seawater intrusion
  • Taylor diagram
  • Uncertainty analysis

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