FOREST FIRE MONITORING AND DAMAGE ASSESSMENT IN MEDITERRANEAN LANDSCAPES
THROUGH THE INTEGRATION OF REMOTE SENSING AND GIS TECHNIQUES
Jesüs San Miguel-Ayanz
Alessandro Annoni
Guido Schmuck
Jean Meyer-Roux
European Commission,
DG-Joint Research Centre
Space Applications Institute
Agriculture Information Systems Unit
I-21020, Ispra (Va), Italy
ISPRS Commission VII, Working Group WG VII/2
KEY WORDS: forest fires, remote sensing, Geographic Information system (GIS)
ABSTRACT
Forest fires constitute one of the major natural hazards in
the Mediterranean region. Extensive areas are burnt
every year producing large economic and environmental
damage. This damage should not only be quantified by
the amount of timber burnt but also by the environmental
impact of forest fires on Mediterranean landscapes.,
which leads to land degradation and often prevents
vegetation recovery. The present study combines low and
high spatial resolution remotely sensed data in the
detection of fires and mapping of burnt areas with
geographic information systems (GIS) techniques in the
assessment of fire damage. Environmental damage of
burnt areas is derived from the combined analysis of burnt
surfaces with European scale datasets, such as the
CORINE database.
1. MATERIAL AND METHODS
1.1. Study Area
The study area for the present region is located in
southern Spain, near the village named Los Barrios which
is located at 36? Lat. N, 5? 10' Long. W, within the
region of Andalusia. Andalusia covers 87.268 square
kilometers, i.e. 20% of the Spanish territory
approximately and is one of the most fire prone regions in
Mediterranean region due to its marked Mediterranean
climate, with a very intense summer drought and high
temperatures during that season. Forested areas occupy
50% of the Andalusian territory of which almost 20%
correspond to natural parks. The mean annual
investment is over 45 million ecu for prevention and fight
against forest fires. Every forest fire over the size of 200
hectares is mapped and introduced in the natural
resources database of the Andalusian Environmental
Agency (AEA).
The fire under study took place in the summer of 1997.
According to official statistics the fire started on August
6™ and was extinguished on August 11", affecting and
area of 938 hectares, of which 695 are forested areas, 49
hectares are shrubs and 194 hectares are covered by
pastures.
1. 2. Ground Data
Ground data for the present project consisted on the
CORINE land-cover database (CORINE, 1993; Perdigáo
and Annoni, 1997). CORINE land-cover has a minimum
area representation of 25 ha. The classification scheme
used for CORINE is similar to Anderson's (Anderson, J.
R. et al., 1976), with three levels or refinement. It offers
many advantages for analysis of forest fire damages in
Europe, being the main one that this database is common
to all European countries. The use of a common
nomenclature to derive damage caused by forest fires
solves the complicated problem of data harmonization
among European countries.
1.3. Satellite data
Two types of satellite data were used in this study, NOAA
AVHRR data, for the detection of the fire, and IRS-1C
LISS-3 for mapping the burnt area.
Satellite data of high spatial resolution from the Indian
sensor LISS-3 sensor on board of the IRS-1C satellite
were used for burnt area mapping. LISS-3 provides a
spatial resolution of 23 m bands in the range of the green
(G), red (R), and near-infrared (NIR) parts of the
170 International Archives of Photogrammetry and Remote Sensing. Vol. XXXII, Part 7, Budapest, 1998
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