Review of geotechnical measurement techniques for a nuclear waste repository in bedded salt Page: 29 of 285
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Multi spectral photography i-on be used to enhance specific features by
obtaining various color combinations. However, multispectral photography
is much more expensive, and it has no significant advantage over normal
color. Multispectral photographs lack the ground resolution of conven-
tional photographs.
Ultraviolet photography is not widely used in remote sensing because
atmospheric scattering produces photographs of poor contrast and low
resolution.
The various types of photography can be employed using the three imagery
acquisition techniques discussed below.
• Conventional Aerial Photography - Aerial photographs can be
used to delineate formation outcrops and structural features,
and data derived from photo interpretation can be correlated
with information obtained from surface and subsurface investiga-
tions to provide a complete geological interpretation of the
selected area. Stereoscopic viewing of aerial photographs
provides a comprehensive picture, and may reveal features that
are not evident from the ground (Miller, 1961; Ray, 1960).
Numerous photogrammetric instruments are available to obtain
quantitative information from aerial photography. Photo-
grammetric measurements can be used to determine the strike
direction and dip magnitude of exposed strata, to calculate the
thickness of geolooic sections, to determine the offset of
faults, and to obtain topographic information. It is also
possible to relatively quantify such features as drainage
density and fracture density, which can be related to permea-
bility and ground-water recharge.
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Review of geotechnical measurement techniques for a nuclear waste repository in bedded salt, report, December 1, 1979; United States. (https://digital.library.unt.edu/ark:/67531/metadc1093986/m1/29/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.