Advantages of Remote
Sensing-Earth Science Assignment Help, Homework Help
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Remote sensing can be defined as the science of acquiring
spatial, spectral and temporal information about any object, area or phenomenon
through the analysis of data collected by special instruments that are not in
physical contact with the objects, area or phenomenon which are being analyzed.
Applications of Remote Sensing
As with its different types of data,
remote sensing can be used for
application in several different areas as give below.
Meteorology
Remote sensing helps to measure
atmospheric temperature, pressure, water vapour, aerosols and wind pattern. Meteorological satellites are vital in weather
forecasting and warning services and identification of clouds. Because of their
huge aerial coverage, meteorological satellite images can be used to track the
weather systems and monitor them. This is particularly useful in monitoring
severe weather systems like tropical cyclones.
Oceanography
Monitor the current systems and ocean circulation, measure
ocean temperature, wave heights and ocean colour, track sea ice.
The remote sensing data
obtained can be utilized for understanding the oceans in a better way and for
managing the ocean resources in the best possible way.
In
coastal areas
remote sensing is helpful for
monitoring changes along the shoreline, tracking the path of sediment transport,
and for mapping the features along the coast. The
remote sensing data can be utilized for erosion prevention and coastal mapping.
Geology
In geological
field, remote sensing is used as a tool
to extract information about the land surface structure, and composition,
mapping of the geological structures, identification of rock type, mapping
faults and structure, the ecology of a
particular area, the resources contained in the area and the impact of human
actions on the natural landscape. The
remote sensing techniques are more
effective and useful for understanding sedimentary basins and these
remote sensing techniques also help to locate natural oil fields.
Hydrology
In hydrology, the techniques of remote
sensing help in assessing water resources from rain fall, snow and
underground aquifers. Remote sensing also helps in monitoring and mapping of wetlands,
estimating soil moisture, measuring the thickness of snow, monitoring of lake
and river ice, monitoring and mapping of floods, detection of change of delta/
river, mapping of drainage basin, watershed modeling, detection of irrigation
canal leakage and irrigation scheduling.
Agriculture and Forestry
Remote Sensing techniques help in
monitoring the vegetation types, their growth potential and sometimes the
conditions conductive for vegetation. Remote sensing also monitors
health of crops; maps soil moisture; helps in detecting forest type and monitors
deforestation. Certain phenomenon, which cannot be seen by human eye, can be
observed through remote sensing techniques.
An example
for this is that of the trees, which are affected by
disease, can be detected by
remote sensing techniques.
Glaciology
In glaciology, remote sensing helps to measure volume of ice
caps, velocity of ice stream, and its distribution.
Geodesy
Remote sensing helps in
measuring the figure of the Earth and its gravity field.
Disaster warning and assessment
Remote sensing techniques help to
monitor floods and landslides, volcanic activity, earth quake, assessing damage
zones from natural disasters.
Planning applications
Remote sensing techniques
are used for mapping conservation zones;
monitoring land use in urban areas and that of deforestation.
Military
Remote sensing
helps in developing accurate maps
for planning and monitoring the military communications and transportations and
for monitoring movements of the ships as well as that of the troops.
Key words:
Remote Sensing, Satellite, Deforestation, Ocean temperature, Aerosols,
Irrigation.
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