1German Remote Sensing Data Center (DFD), German Aerospace Center (DLR), Oberpfaffenhofen, Germany
2Institute of Economic and Cultural Geography, Leibniz University of Hannover, Germany
3Norwegian Geotechnical Institute, Oslo, Norway
4Institute of Geography, Christian-Albrechts-Universität zu Kiel, Germany
5Department of Geography, Ludwig-Maximilians-University, Munich, Germany
6Institute of Geography, Cluster of Excellence The Future Ocean, Christian-Albrechts-Universität zu Kiel, Germany
Received: 31 Dec 2011 – Revised: 06 Apr 2012 – Accepted: 20 Apr 2012 – Published: 28 Jun 2012
Abstract. Recent tsunami disasters, such as the 2004 Indian Ocean tsunami or the 2011 Japan earthquake and tsunami, have highlighted the need for effective risk management. Remote sensing is a relatively new method for risk analysis, which shows significant potential in conducting spatially explicit risk and vulnerability assessments. In order to explore and discuss the potential and limitations of remote sensing techniques, this paper presents a case study from the tsunami-affected Andaman Sea coast of Thailand. It focuses on a local assessment of tsunami hazard and vulnerability, including the socio-economic and ecological components. High resolution optical data, including IKONOS data and aerial imagery (MFC-3 camera) as well as different digital elevation models, were employed to create basic geo-data including land use and land cover (LULC), building polygons and topographic data sets and to provide input data for the hazard and vulnerability assessment. Results show that the main potential of applying remote sensing techniques and data derives from a synergistic combination with other types of data. In the case of hazard analysis, detailed LULC information and the correction of digital surface models (DSMs) significantly improved the results of inundation modeling. The vulnerability assessment showed that remote sensing can be used to spatially extrapolate field data on socio-economic or ecological vulnerability collected in the field, to regionalize exposure elements and assets and to predict vulnerable areas. Limitations and inaccuracies became evident regarding the assessment of ecological resilience and the statistical prediction of vulnerability components, based on variables derived from remote sensing data.
Römer, H., Willroth, P., Kaiser, G., Vafeidis, A. T., Ludwig, R., Sterr, H., and Revilla Diez, J.: Potential of remote sensing techniques for tsunami hazard and vulnerability analysis – a case study from Phang-Nga province, Thailand, Nat. Hazards Earth Syst. Sci., 12, 2103-2126, doi:10.5194/nhess-12-2103-2012, 2012.