Download - Environment Rs August 08
Environment through Remote Sensing
Environmental Changes:
• Inherent type: seasonal & other natural changes including the changes caused by natural disasters – positive or negative
• Induced type: due to human use and abuse – negative only
Environmental Changes:
• Local:
village, district level
• Regional:
state, national level
• Global:
continental, world level
Our concern is to:
• Map, Measure and Monitor
> the natural & man-made world;
> locally, regionally and globally
on a periodical & real-time basis
Global MonitoringGlobal Monitoring
Environmental features monitored includeEnvironmental features monitored include:• Global vegetation cover• Ocean productivity• Global biosphere• Ocean Temperature• Ozone levels• Snow and ice• Atmospheric pollutants• Wave height and direction
Ozone Levels
• Depletion develops in
October
• Changes seasonally
• Gradually getting
larger over time
Global Vegetation Cover
Ocean Temperature
• Water is a good approximation of a black body
• Monitoring climatic events, eg. El Nino
• Monitor long term climatic change
Remote Sensing ApplicationsRemote Sensing Applications
Mineral and Rock Spectral MappingMineral and Rock Spectral Mapping
data model
Local Environmental MonitoringLocal Environmental MonitoringDe-forestationDe-forestation
Bush Fire - Detection using smoke
Bush Fire - Detection using smoke
Remote sensing platforms: LIDAR
• Canopy surface
Remote sensing platforms: SAR (Synthetic Aperture Radar)
• SAR image of Washington, DC
• textures are easily differentiated_
Remote sensing platforms: SAR (Synthetic Aperture Radar)
• SAR image of Amazon Basin
• previous river channels clearly visible