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Experimental Fire Hazard Mapping from Satellite Data
Bisher ImamAssociate Director
Hydrologic Data and Information System
Department of Hydrology and Water ResourcesThe University of Arizona
MODIS: Moderate Resolution Imaging Spectrometer(Onboard EOS-TERRA)
HyDIS is creating an easily accessibleSW MODIS Imagery Archive
Normalized Difference Vegetation Index NDVINormalized Difference Vegetation Index NDVI
250 meters16 days maximum NDVIReduces cloud interferenceLegacy product
250 meters16 days maximum NDVIReduces cloud interferenceLegacy product
SnowSnow
Denser VegetationHigher Moisture ContentMore active
Denser VegetationHigher Moisture ContentMore active
03/22/200203/22/2002 04/07/200204/07/2002
04/23/200204/23/2002 05/09/200205/09/2002 05/25/200205/25/2002
NDVI Spring SequenceNDVI Spring Sequence
Experimental NDVI Fire Hazard MappingExperimental NDVI Fire Hazard Mapping
Decline duringLast 16 daysDecline duringLast 16 days
Decline consistentlyDuring last 32 daysDecline consistentlyDuring last 32 days
Decline consistentlyDuring last 48 daysDecline consistentlyDuring last 48 days
Decline consistentlyDuring last 74 daysDecline consistentlyDuring last 74 days
Experimental NDVI Fire Hazard MappingExperimental NDVI Fire Hazard Mapping
Decline duringLast 16 daysDecline duringLast 16 days
Decline consistentlyDuring last 32 daysDecline consistentlyDuring last 32 days
Decline consistentlyDuring last 48 daysDecline consistentlyDuring last 48 days
Decline consistentlyDuring last 74 daysDecline consistentlyDuring last 74 days
Forest At RiskForest At Risk
0%
25%
50%
75%
100%
Proportion of Decline TimeProportion of Decline Time
Early Detection (32 days. 03-22 04-23 )Early Detection (32 days. 03-22 04-23 )
Data available on 05-23Data available on 05-23
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