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Topographic Effects in Resistivity Surveys

Description: 
The nature and significance of topographic-effect resistivity anomalies are discussed and a two-dimensional, finite element computer technique is described that provides a means for: (1) analyzing the nature of these anomalies, (2) correcting apparent resistivity data for topographic effects, and (3) incorporating topography in interpretative models. The effects of slope length and slope angle on the shapes and amplitudes of these anomalies for a valley, a ridge and a slope were studied. A technique for correcting apparent resistivity for topographic effects uses the finite element program to compute the correction factors. The accuracy of these corrections depends upon how closely the actual case approximates an ideal two-dimensional model. Examples are given to show how topographic effects produce anomalies that can lead to erroneous interpretations
Record Format: 
PDF pages: 115; Front Matter: 4; Report: 31; Appendix: 74; Disclaimer Pages: 2; Other: 4
1978-09-01
Subject: 
GEOTHERMAL ENERGY
RESISTIVITY SURVEYS
DATA ANALYSIS
TOPOGRAPHY
DIAGRAMS
DIPOLES
ELECTRODES
GEOTHERMAL EXPLORATION
MATHEMATICAL MODELS
POSITIONING
TWO-DIMENSIONAL CALCULATIONS
ELECTRICAL SURVEYS
EXPLORATION
GEOPHYSICAL SURVEYS
MULTIPOLES
Diagrams
Data Analysis
Mathematical Models
Dipoles
Two-dimensional Calculations
Electrical Surveys
Geophysical Surveys
Topography
Multipoles
Resistivity Surveys
Positioning
Electrodes
Exploration
Geothermal Exploration
Geothermal Energy
Type: 
Text
Raw Url: 
http://digitallib.oit.edu/oai/oai.php?metadataPrefix=oai_dc&verb=GetRecord&identifier=oai:digitallib.oit.edu:geoheat/1091
Repository Record Id: 
oai:digitallib.oit.edu:geoheat/1091
SetSpec: 
geoheat
Record Title: 
Topographic Effects in Resistivity Surveys
oitGHC_0114-01
http://digitallib.oit.edu/cdm/ref/collection/geoheat/id/1091
Resource OE Format: 
randomness