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Monitoring post-tsunami vegetation recovery in Phang-Nga province, Thailand, based on IKONOS imagery and field investigations – a contribution to the analysis of tsunami vulnerability of coastal ecosystems

Römer, Hannes and Jeewarongkakul, Jirapong and Kaiser, Gunilla and Ludwig, Ralf and Sterr, Horst (2011) Monitoring post-tsunami vegetation recovery in Phang-Nga province, Thailand, based on IKONOS imagery and field investigations – a contribution to the analysis of tsunami vulnerability of coastal ecosystems. International Journal of Remote Sensing, 33 (10), pp. 3090-3121. Taylor & Francis. DOI: 10.1080/01431161.2011.628710 ISSN 0143-1161

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Official URL: http://dx.doi.org/10.1080/01431161.2011.628710

Abstract

A major tsunami in December 2004 devastated the coastal ecosystems along the Andaman Sea coast of Thailand. Since intact coastal ecosystems provide many important services for local communities at the Andaman Sea, it is crucial to investigate to what extent (in terms of percentage area and speed) the affected ecosystems were capable of recovering after the tsunami. Field measurements and multi-date IKONOS imagery were used to estimate the recovery and succession patterns of coastal vegetation types in the Phang-Nga province of Thailand, three years after the tsunami. Thus, this study contributes to a holistic understanding of the ecological vulnerability of the coastal area to tsunamis. A zone-based change detection approach is applied by comparing two change detection techniques: the first method involves the calculation of a recovery rate based on multi-temporal TNDVI (transformed normalized difference vegetation index) images (TNDVI approach), whereas the second approach is a combined approach of the change vector analysis (CVA). Although these two methods provide different types of information (quantitative for the TNDVI approach, qualitative for the CVA), they are comparable in terms of results and accuracies. The results reveal that recovery processes vary based on the type of the ecosystem and, furthermore, are strongly influenced by human activities. Grasslands, coconut plantations and the mixed vegetation cover could recover faster than the mangroves and casuarina forests. Among the forest ecosystems, recovery rates of casuarina forests were higher than for mangroves, but the recovery area was smaller. This study also discusses the potential and some limitations and inaccuracies of applying high-resolution optical imagery for assessing vegetation recovery at a local scale.

Item URL in elib:https://elib.dlr.de/85546/
Document Type:Article
Title:Monitoring post-tsunami vegetation recovery in Phang-Nga province, Thailand, based on IKONOS imagery and field investigations – a contribution to the analysis of tsunami vulnerability of coastal ecosystems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Römer, Hanneshannes.roemer (at) dlr.deUNSPECIFIED
Jeewarongkakul, JirapongWetlands International – Thailand office, Hat Yai, ThailandUNSPECIFIED
Kaiser, GunillaDepartment of Geography, Christian-Albrechts-Universität zu KielUNSPECIFIED
Ludwig, RalfDepartment of Geography, Ludwig-Maximilians-UniversitätUNSPECIFIED
Sterr, HorstDepartment of Geography, Christian-Albrechts-Universität zu KielUNSPECIFIED
Date:25 October 2011
Journal or Publication Title:International Journal of Remote Sensing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:33
DOI :10.1080/01431161.2011.628710
Page Range:pp. 3090-3121
Publisher:Taylor & Francis
ISSN:0143-1161
Status:Published
Keywords:ecosystems, Thailand, tsunami, vulnerability, change detection, IKONOS, NDVI, recovery, vegetation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Zivile Kriseninformation und Georisiken (old)
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Geo Risks and Civil Security
Deposited By: Römer, Hannes
Deposited On:22 Nov 2013 10:42
Last Modified:10 Jan 2019 15:48

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