Presented to Earthworks Satellite Remote Sensing for Environmental Advocacy John F. Amos, SkyTruth...
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Transcript of Presented to Earthworks Satellite Remote Sensing for Environmental Advocacy John F. Amos, SkyTruth...
Presented to
Earthworks
Satellite Remote Sensing for Environmental Advocacy
John F. Amos, SkyTruth
Washington, DC – March 26, 2004
• A 501(c)(3) nonprofit organization– exemption in March 2002
• Based in Shepherdstown, West Virginia
• A distributed network of remote sensing and GIS experts and partner organizations
• Providing remote sensing and GIS assistance and training to environmental advocates and government agencies
What Is SkyTruth?
What Is Remote Sensing?
• Collecting information from a distance, by measuring energy coming from the target
– Energy reflected off the target from a natural source (sunlight)
– Energy reflected off the target from an artificial source (examples: sonar, seismic, radar)
– Energy emitted by the target (example: infrared “heat”)
Landsat ETM satellite image
Northern California
180x180 km
REFLECTED ENERGY, NATURAL SOURCE
Visible – Infrared Image
Probe airborne scanner image
Santa Barbara, California
REFLECTED ENERGY, NATURAL SOURCE
Visible – Infrared Image
RADARSATradar satellite image
Natural oil slicks
Gulf of Mexico
REFLECTED ENERGY, ARTIFICIAL SOURCE
Radar Image
Landsat ETM thermal infrared satellite image
Wildfire (yellow line) and burned area (dark red)
Kazakhstan
EMITTED ENERGY
Thermal Image
Trends in Remote Sensing
Decreasing Data Cost
Landsat, 1990s: $4,400 Landsat, today: $ 600
Desktop Mapping
Improved GIS software Powerful desktop PCs Demonstrated applications Rapid Internet distribution
New Platforms/Sensors
High-resolution, Radar, Hyperspectral
High-Resolution Imagery
Ikonos high-resolution satellite image
1 meter detail (50 cm in 2004?)
Precision mapping, monitoring
APPLICATION EXAMPLE
Gas Field Infrastructure – Jonah, WY
Upper Green River valley, Wyoming
Pinedale BLM jurisdiction, black
Jonah natural gas field, red
Landsat TM
APPLICATION EXAMPLE
Gas Field Infrastructure – Jonah, WY
Well pad with working drill rig
Pad ~4 acres
Jonah gas field
APPLICATION EXAMPLE
Gas Field Infrastructure – Jonah, WY
Jonah field – aerial view looking west, June 2001
Products
• Poster-size maps, images, image collages
• Page-size information handouts
• Digital graphics
– Slide shows
– Web publishing
– Brochures and flyers
Products
• GIS Data Layers
– Map oriented, enhanced imagery
– Analyses derived from imagery
• Land use / land cover
• Change detection
• Pollution detection
• Forward-looking simulations
APPLICATION EXAMPLE
Mining - Rudnyi, Kazakhstan
Tailings pond dimensions calculated on-screen
Length (E-W) is 5.4 km
Area is 950 ha
Tailings volume is 190M m3
(assuming 20m thickness)
2000 – View to west, Marfork mine complex.Topography data modified to average elevation
calculated within mining area.
APPLICATION EXAMPLE
Mining – Mountaintop Removal, WV
Regional impact of mining practices
Marfork complex in upper right
Other MTRM areas pink
APPLICATION EXAMPLE
Mining – Carlin Trend, NV
Betze-Post Mine
Largest gold mine in U.S.
3rd largest in world
Surface and underground operations
Cyanide heap-leaching
Betze-Post gold mine
2 years after surface ore discovery (Post deposit)
Total surface area impact:3,226 acres
1984
Betze-Post gold mine
4 years after acquisition by Barrick and discovery of Betze deposit
Total surface area impact6,812 acres512 acres/yr
1991
Betze-Post gold mine
4 years after Barrick opens underground Meikle deposit
Total surface area impact14,036 acres803 acres/yr
2000