The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008
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As a kind of specific bad geology phenomena, No matter
whether landslides, collapse, mudflow and other disasters or
disaster colony formed by them, the shape, hue, image texture
structure and so on they assume on remote sensing image have
definite difference with circumjacent background. Thus it is
directly identified and delineated from remote sensing image for
scale, morphological characteristics and gestation feature of
collapse, slide, mud and other geologic hazards, by which it can
carry out systemic and comprehensive survey for generant
geologic hazard points and hidden danger points of geologic
hazard in target area via remote sensing explanation of geology
disasters to ascertain their distribution, scale, formation cause,
upgrowth feature, development trend, harmfulness and
influencing factor, on the basis of which to carry out geologic
hazard zoning, to partition easy occurring geologic hazard, to
appraise easy occurring degree and to furnish base data for
preventing the geologic hazard hidden danger and establishing
the geologic hazard monitoring network.
On the basis of using high resolution satellite image or aero
photographic image to carry out remote sensing explanation,
geologic hazard distribution graph can be compiled via
explanation and survey for coast, dilapidation, mudflow and so
on. It can express a variety of geologic hazard position,
boundary, element and other time and space features and plane
scale in detail and become one of important base data and basic
gist of planning and design even geologic hazard evaluation, in
addition, it can also carry out disaster genetic analysis and trend
anticipation from macroscopy.
Governing for geologic hazard shall first master extent of
damage and development trend of geologic hazard, which
includes casualty of personnel and livestock casualty, loss of
village, mine, highway, bridge, hydraulic architecture and other
property as well as demolition of soil, forest, water area and
other natural resources. Using remote sensing technique to carry
out geologic hazard survey, except that casualty of personnel
and livestock is difficult to be statistic, can carry out real-time
or quasi real time survey and evaluation for demolition situation
of engineering facilities and natural resources and furnish the
exact gist for disaster salvage.
Remote sensing technique is one rising hi-tech means. Not only
it is necessary, but also feasible that using remote sensing
technique unfolds the geologic hazard survey. Remote sensing
technique can be transpierced to overall process of survey,
monitoring, pre-warning and evaluation of geologic hazard.
Along with gradual perfection of remote sensing technique
theory and gradual elevation of spatial resolution spatial
resolution, time resolution and spectrogram resolution of remote
sensing image, remote sensing technique will certainly become
one of indispensable means of macro-survey of geologic hazard
and environment of pregnant disaster as well as evaluation of
disaster body dynamic monitoring and the situation of disaster
loss.
6. GEOLOGIC EVALUATION OF MINE FIELD
ENGINEERING
Surrounding mine field infrastructure construction, it carries out
engineering geologic investigation and appraisal of remote
sensing of road, the site of factory and other engineering types
and fully exert intuitionistic, fast, exact, high efficient
predominance of remote sensing technique. On the basis of
analyzing the existing area geology and bad geology, taking
satellite image as basic information source, It unfolds the
engineering geology remote sensing explanation, entirely
extracts relative topography and relief, stratum lighology,
geologic structure, hydrogeologic condition, engineering
geologic condition, bad geology, vegetation and other
information and carries out field investigation validation. Via
aggregate analysis study, it initially ascertains engineering
geology actuality, bad geology phenomenological type,
distribution state, upgrowth feature, development trend and
vegetational type, coverage and height, appraises engineering
geologic condition and stability zone by zone to carry out sub
area by engineering geology complexity for entire project area
and presents the corresponding updated scheme and next step
survey working proposal.
6.1 Engineering geology remote sensing analyses
1. Geomorphy type remote sensing analyses
According to relief genetic type and morphological
characteristics, different relief genetic type possesses different
image texture, drainage type and other image features, by
remote sensing explanation, it can carry out a partition for zonal
relief.
2. Rock soil mass type remote sensing analyses
On the basis of full explanation of stratum lithology, based on
rock type, structure fabrication, formation rule, physical
mechanical property and so on, it can carry out engineering
geology rock formation partition for rock soil mass in area.
6.2 Geologic structure remote sensing analyses
By explanation of fault structure property, scale, space
distribution feature, it ascertains relative time sequence and
explains the active structure and focuses to analyze the possible
generant impact for engineering.
6.3 Hydrogeologie condition analyses
Deposit and distribution of underground water are mainly
subjected to be controlled by geologic structure, relief, lithology,
climate and ancient landform conditions. According to
explanation for water-bearing rock within area, combined with
deposit condition and waterpower feature, it can carry out
appraisal for underground water type and water abundance.
6.4 geological hazard remote sensing analyses and easy
occurring degree forecast
With essential information source of satellite image, via remote
sensing explanation, field investigation validation and available
information analyses, it can ascertain coast, dilapidation,
mudflow, instability incline and other bad geology phenomena.
On the basis of explanation of bad geology points in detail,
based on principle of whether to have effect for engineering;
principle of mean upgrowth density of bad geology phenomena;
principle of topographic relief, engineering geology rock
formation, geologic structure and inducing factor similarity;
principle of regional engineering geology condition integrality,
it adopt a fuzzy mathematics syntheses judge method to carry
out analyses of forecast and partition for easy occurring degree
of bad geology.