On the effectiveness of 2D electrical inversion results: an agricultural case study

• Published in: Geophysical Prospecting Vol. 49; no. 5; pp. 570 - 576
• Main Authors: Panissod, C., Michot, D., Benderitter, Y., Tabbagh, A.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Science Ltd 01-09-2001; Blackwell; Wiley
• Subjects: Earth sciences; Earth, ocean, space; Environmental Sciences; Exact sciences and technology; Geophysics: general, magnetic, electric and thermic methods and properties; Internal geophysics; Life Sciences; Soils; Surficial geology; France; Beauce; Western Europe; algorithms; models; finite difference analysis; Europe; case studies; evapotranspiration; electrical methods; apparent resistivity; anomalies; agriculture; plants; tomography; three-dimensional models; two-dimensional models; electrical resistivity; MODELE BIDIMENSIONNEL
• ISSN: 0016-8025; 1365-2478
• DOI: 10.1046/j.1365-2478.2001.00277.x

Electrical resistivity tomography was used in Beauce (France) to assess the water extraction by corn plants (evapotranspiration). The acquired pseudosections show conductive anomalies under the plants. A 2D inversion of measurements led us to identify clear resistive features associated with the water losses under the corn‐plant rows. New models have been calculated with two different 3D algorithms (finite‐difference and moment‐method) to take into account 3D structure of the ground and to confirm that periodic resistive features may generate shifted apparent‐resistivity anomalies.