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