QUESTION FOUR Geophysical surveying is a means of filling data on strata changes between widely spaced boreholes. On large sites geophysical methods can show economies due to the rapidity with which extensive areas can be covered. Geophysical methods are best suited to deep investigations of in rock strata, for examples dams or tunnels where the stratification of rocks at depth is required, and for investigations in soils containing many cobbles or boulders where probings or cone tests ara impracticable. Describe the following geophysical methods of investigations: (i) Electrical resistivity (ii) (iii) Magnetic (iv) Seismic refraction and reflection Gravimetric (v) Side scan sonars (vi) Borehole logging (vii) Ground radar

Structural Analysis
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Author:KASSIMALI, Aslam.
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QUESTION FOUR
Geophysical surveying is a means of filling data on strata changes between widely
spaced boreholes. On large sites geophysical methods can show economies due to
the rapidity with which extensive areas can be covered. Geophysical methods are
best suited to deep investigations of in rock strata, for examples dams or tunnels
where the stratification of rocks at depth is required, and for investigations in soils
containing many cobbles or boulders where probings or cone tests ara
impracticable. Describe the following geophysical methods of investigations:
(i) Electrical resistivity
(ii)
(iii) Magnetic
(iv) Seismic refraction and reflection
Gravimetric
Side scan sonars
(v)
(vi) Borehole logging
(vii) Ground radar
Transcribed Image Text:QUESTION FOUR Geophysical surveying is a means of filling data on strata changes between widely spaced boreholes. On large sites geophysical methods can show economies due to the rapidity with which extensive areas can be covered. Geophysical methods are best suited to deep investigations of in rock strata, for examples dams or tunnels where the stratification of rocks at depth is required, and for investigations in soils containing many cobbles or boulders where probings or cone tests ara impracticable. Describe the following geophysical methods of investigations: (i) Electrical resistivity (ii) (iii) Magnetic (iv) Seismic refraction and reflection Gravimetric Side scan sonars (v) (vi) Borehole logging (vii) Ground radar
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