Delineating and modelling an underground water conduit by scattered micro-gravity data and electrical resistivity sounding

Vahid E. Ardestani

doi:10.1071/EG09043

ISSN: 0812-3985
E-ISSN: 1834-7533

Delineating and modelling an underground water conduit by scattered micro-gravity data and electrical resistivity sounding
Authors Vahid E. Ardestani^a
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^a Institute of Geophysics, University of Tehran, Kargar Shomali St., PO Box 14155-6466, Iran and Center of Excellence in Geomatics Engineering and Disaster Management, Kargar Shomali St., Technical Faculty of University of Tehran, Iran. Email: [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 41, Issue 3, Sep 2010, p. 210 - 218
DOI: https://doi.org/10.1071/EG09043
- Received: 30 Sep 2009
- Accepted: 17 Aug 2010
- Published online: 01 Sep 2010

Abstract

Scattered micro-gravity data and electrical resistivity sounding are used in a very rough terrain area to delineate the underground water conduit in a karst zone.

A dense digital terrain model is used to compute terrain corrections and Bouguer gravity anomalies. Residual gravity anomalies are computed by the polynomial fitting method. The sun shading filter and first vertical derivatives are applied to residual anomalies to delineate the conduit.

The karst zone including the conduit is modelled by the well known Marqurt-Levenberg inversion technique. An electrical resistivity survey has also been carried out. The results of electrical soundings confirm the existence of a high-resistivity layer cut by a low-resistivity channel at the depth estimated through micro-gravity data.

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Delineating and modelling an underground water conduit by scattered micro-gravity data and electrical resistivity sounding

Exploration Geophysics 41, 210 (2010); https://doi.org/10.1071/EG09043

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Article Type: Research Article

Keyword(s): electrical soundings, scattered micro-gravity data, sun-shading, 2-D inversion.

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Delineating and modelling an underground water conduit by scattered micro-gravity data and electrical resistivity sounding

Abstract

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