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Burnt area mapping in the European-Mediterranean: SAR backscatter change analysis and synergistic use of optical and SAR data

Bernhard, Eva-Maria and Twele, André and Gähler, Monika (2012) Burnt area mapping in the European-Mediterranean: SAR backscatter change analysis and synergistic use of optical and SAR data. In: Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International, pp. 2141-2143. IGARSS 2012: International Geoscience and Remote Sensing Symposium: Remote Sensing for a dynamic Earth, 23. - 27. Juli 2012, München. ISBN 978-1-4673-1158-8 ISSN 2153-6996

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Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp;jsessionid=f1yNQnbLpfKxHSpv32sD8g5HfPnPZp1WcjjN2kpL1hTR3Y1FD2kP!1364212599?arnumber=6351080&contentType=Conference+Publications

Abstract

Optical satellites are commonly the main data source used for burnt area mapping in a rush mode, but data availability can be limited by weather conditions or direct fire effects such as smoke plumes or haze. Thus, our study focused on compensating these shortcomings through the complementary use of SAR data. In order to investigate the potential of TerraSAR-X (ScanSAR and StripMap) data for burnt area mapping, a multi-temporal backscatter coefficient analysis of four different study sites (La Palma, Portugal, Sardinia and Greece) was performed. The backscatter values in the post-disaster images increased significantly in all study sites, whereas VV polarization showed higher difference values than HH polarization. When comparing backscatter values of individual vegetation types (CORINE land cover classification), the absolute backscatter difference of post- and pre-disaster images varied. High growing and dense vegetation showed a larger backscatter change than low growing and sparse vegetation. To provide information about forest fires also during bad weather conditions, a semi-automatic, object-based, fast and transferable algorithm using very high resolution optical as well as SAR data was developed. The optical part of the algorithm is object-based and uses single- or multi-temporal spectral indices. In order to reduce limitations in optical data due to cloud cover, the algorithm also employs change detection techniques (ratio, difference and index calculation) of TerraSAR-X data.

Item URL in elib:https://elib.dlr.de/79746/
Document Type:Conference or Workshop Item (Poster)
Title:Burnt area mapping in the European-Mediterranean: SAR backscatter change analysis and synergistic use of optical and SAR data
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bernhard, Eva-MariaEva-Maria.Bernhard (at) dlr.deUNSPECIFIED
Twele, Andréandre.twele (at) dlr.deUNSPECIFIED
Gähler, Monikamonika.gaehler (at) dlr.deUNSPECIFIED
Date:July 2012
Journal or Publication Title:Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 2141-2143
ISSN:2153-6996
ISBN:978-1-4673-1158-8
Status:Published
Keywords:Forest fire, SAR backscatter change analysis, burnt area detection
Event Title:IGARSS 2012: International Geoscience and Remote Sensing Symposium: Remote Sensing for a dynamic Earth
Event Location:München
Event Type:international Conference
Event Dates:23. - 27. Juli 2012
Organizer:IEEE Geoscience and Remote Sensing Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Zivile Kriseninformation und Georisiken (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Civil Crisis Information and Geo Risks
Deposited By: Fuchs, Eva-Maria
Deposited On:14 Feb 2013 10:03
Last Modified:08 May 2014 23:23

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