Remote sensing of sulfur dioxide effects on vegetation. Final report. Volume II: data
Three techniques for detecting and mapping sulfur-dioxide (SO/sub 2/) effects on the foliage of sensitive crops and trees near large, coal-fired power plants were tested and evaluated. These techniques were spectroradiometry, photometric analysis of aerial photographs, and computer classification of airborne multispectral scanner data. Spectroradiometry is a useful, ground-based technique for measuring the changes in reflectance that accompany expsure of sensitive crops to SO/sub 2/. Photometric analysis of aerial color-infrared photographs has some practical advantages for measuring the reflectances of forest species or for synoptic point-sampling of extensive areas; these tasks cannot be done effectively by field crews. The relationships among reflectance, foliar injury, and yield of crops are complex and are affected by many extraneous variables such as canopy density. The SO/sub 2/ effects are easier to detect on winter wheat than on soybeans, but in either case they cannot be consistently detected by airborne remote sensors except under near-ideal conditions when the injury is moderate to severe. Airborne multispectral scanner data covering affected soybean fields were analyzed using three computer-assisted classification procedures: unsupervised, supervised, and pseudosupervised; the last method provided the best results. Landsat imagery was also investigated, but the foliar effects of SO/sub 2/ were too subtle to detect from orbit.
- Research Organization:
- Tennessee Valley Authority, Chattanooga (USA). Office of Natural Resources
- OSTI ID:
- 6110806
- Report Number(s):
- TVA/ONR/ARP-81/6; EPA-600/7-81-114; ON: DE82900581
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
FOSSIL-FUEL POWER PLANTS
ENVIRONMENTAL EFFECTS
SOYBEANS
INJURIES
SULFUR DIOXIDE
BIOLOGICAL EFFECTS
WHEAT
AERIAL SURVEYING
AIR POLLUTION
COAL
DATA ANALYSIS
DATA COMPILATION
FOLIAR UPTAKE
GRAPHS
INFRARED RADIATION
INFRARED SURVEYS
INFRARED THERMOGRAPHY
LANDSAT SATELLITES
LEAVES
MAPPING
MAPS
MONITORING
MULTI-CHANNEL ANALYZERS
MULTISPECTRAL PHOTOGRAPHY
MULTISPECTRAL SCANNERS
PATTERN RECOGNITION
PLANTS
REMOTE SENSING
SPECIFICATIONS
SPECTRAL REFLECTANCE
SPECTROPHOTOMETRY
TABLES
TENNESSEE VALLEY REGION
VISIBLE RADIATION
YIELDS
CARBONACEOUS MATERIALS
CEREALS
CHALCOGENIDES
DATA
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ENERGY SOURCES
EQUIPMENT
FOOD
FOSSIL FUELS
FUELS
GEOPHYSICAL SURVEYS
GRAMINEAE
GRASS
INFORMATION
MATERIALS
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHOTOGRAPHY
PHYSICAL PROPERTIES
POLLUTION
POWER PLANTS
PULSE ANALYZERS
RADIATIONS
SATELLITES
SULFUR COMPOUNDS
SULFUR OXIDES
SURVEYS
THERMAL POWER PLANTS
THERMOGRAPHY
UPTAKE
VEGETABLES
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
010900 - Coal
Lignite
& Peat- Environmental Aspects