Direct Current Geoelectric Sounding

Direct Current Geoelectric Sounding PDF Author: P Bhattacharya
Publisher: Elsevier
ISBN: 044460183X
Category : Science
Languages : en
Pages : 146

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Book Description
Direct Current Geoelectric Sounding: Principles and Interpretation provides a comprehensive review of the Schlumberger method of geoelectric sounding, as well as current methods of interpretation. It explores the theoretical foundations of geoelectric sounding, the relative advantages and limitations of the two symmetrical arrangements for vertical electrical sounding, the techniques of interpretation for Wenner sounding curves, and dipole sounding. This volume is based on educational materials used in the study of geoelectric sounding. It begins with an overview of the theory of current flow in a horizontally stratified Earth, followed by a discussion of how the resistivity of the ground is measured. The book explains the current flow in a homogeneous anisotropic and horizontally stratified Earth, the principle of equivalence, and vertical electrical sounding. Moreover, it presents the basic principles and procedures for the construction of theoretical master curves. Asymptotic values of Schlumberger curves, the principle of reduction of two layers and of a three-layer Earth, and Tagg's method of interpretation are also discussed. The book explains the interpretation by curve-matching, characteristics of dipole electric sounding, and geological applications of electrical resistivity sounding. Engineering problems and application examples with self-explanatory diagrams are provided at the end of the chapters. This book will benefit undergraduate and postgraduate students who want to broaden their understanding of exploration geophysics, as well as professional exploration geologists and geophysicists, civil engineers, agricultural scientists, and researchers.

Direct Current Geoelectric Sounding

Direct Current Geoelectric Sounding PDF Author: P Bhattacharya
Publisher: Elsevier
ISBN: 044460183X
Category : Science
Languages : en
Pages : 146

Get Book Here

Book Description
Direct Current Geoelectric Sounding: Principles and Interpretation provides a comprehensive review of the Schlumberger method of geoelectric sounding, as well as current methods of interpretation. It explores the theoretical foundations of geoelectric sounding, the relative advantages and limitations of the two symmetrical arrangements for vertical electrical sounding, the techniques of interpretation for Wenner sounding curves, and dipole sounding. This volume is based on educational materials used in the study of geoelectric sounding. It begins with an overview of the theory of current flow in a horizontally stratified Earth, followed by a discussion of how the resistivity of the ground is measured. The book explains the current flow in a homogeneous anisotropic and horizontally stratified Earth, the principle of equivalence, and vertical electrical sounding. Moreover, it presents the basic principles and procedures for the construction of theoretical master curves. Asymptotic values of Schlumberger curves, the principle of reduction of two layers and of a three-layer Earth, and Tagg's method of interpretation are also discussed. The book explains the interpretation by curve-matching, characteristics of dipole electric sounding, and geological applications of electrical resistivity sounding. Engineering problems and application examples with self-explanatory diagrams are provided at the end of the chapters. This book will benefit undergraduate and postgraduate students who want to broaden their understanding of exploration geophysics, as well as professional exploration geologists and geophysicists, civil engineers, agricultural scientists, and researchers.

Geological Survey Bulletin

Geological Survey Bulletin PDF Author:
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 752

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Book Description


Electromagnetic Depth Soundings

Electromagnetic Depth Soundings PDF Author: L. L. Vanyan
Publisher: Springer Science & Business Media
ISBN: 1468406701
Category : Science
Languages : en
Pages : 317

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Book Description
10.------------------------, 10.------------------------. N ::IE ~ w ~ '" "'0.1 \~ 0 M z SIDE VIEW PLAN VIEW 0.01 LI --'---'---LLL-'---LLLlI ~-L---"---LLL..ll..L.LJ'-':';;' 0.01 1 100 10 100 fr Fig. 1. The behavior of the magnetic and electric fields from a vertical magnetic dipole source at the surface of the earth (after Wait [1951,1955]). earth, the experimental curve so plotted should have the same shape as a portion of the ap propriate theoretical curve, but with the ordinates and abscissas shifted by an amount dependent on the resistivity. The conductivity can be determined from the amount of shift between the field data and the theoretical curve. A detailed description of the curve matching procedure is found in a text by Keller and Frischknecht (1966). The curve matching procedure, though used, has several disadvantages. Measurements must be made over a diagnostic portion of the theoretical curve, one in which there is some curvature, so that the amount of shift required to make a match can be determined uniquely. This means that the approximate conductivity of the earth must be known when measurements are made. Secondly, determination of a single value of conductivity requires measurements made over a wide range of frequencies. This would appear to be wasteful of data, inasmuch as the equations indicate that a single measurement at a single frequency should be enough to de termine conductivity.

Geophysical Abstracts ...

Geophysical Abstracts ... PDF Author:
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 876

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Geophysical Abstracts, 180 January-March 1960

Geophysical Abstracts, 180 January-March 1960 PDF Author:
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 718

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Book Description


Geophysical Abstracts, 182 July-September 1960

Geophysical Abstracts, 182 July-September 1960 PDF Author:
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 184

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Book Description


Geophysica

Geophysica PDF Author:
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 624

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Book Description


Geophysical Abstracts

Geophysical Abstracts PDF Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 792

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Book Description


Petroleum Abstracts

Petroleum Abstracts PDF Author:
Publisher:
ISBN:
Category : Petroleum
Languages : en
Pages : 1512

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Book Description


Mid-Latitude Slope Deposits (Cover Beds)

Mid-Latitude Slope Deposits (Cover Beds) PDF Author: Arno Kleber
Publisher: Elsevier
ISBN: 0323960049
Category : Science
Languages : en
Pages : 372

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Book Description
Mid-Latitude Slope Deposits (Cover Beds), Second Edition focuses on widespread deposits and discusses their properties, genesis and age in subdued mountains of Central Europe, where to date most research on the matter has been conducted. The ecological consequences of such slope deposits on soils, slope water dynamics, and slope failures are addressed. Finally, transfer of the cover-bed concept to other mid-latitude regions is attempted for the reconstruction of landscape evolution. This unique compilation, covering several decades of a facies-oriented approach to slope-deposit research delivers deep insights into the wide field of research on cover beds and encourages researchers all over the world. This is a valuable resource for students, academics and researchers in geomorphology, quaternary sciences, pedology, hydrology, and sedimentology. - Provides a unique compilation covering several decades of slope-deposit research with a facies-oriented approach - Covers new fields of research developed since the first edition on interbedded/intercalated loess-like slope deposits and the provenance of cover-bed eolian matter - Addresses ecological consequences on soils, slope water dynamics and slope failures