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Tsunami hazard valuation using spatial tools for Kuala Muda, Kedah, Malaysia

Mohd. Ibrahim, Seen and Wan Nor, Zanariah and Abdul Rashid , Mohammed Shariff and Kok, Fook Loh (2009) Tsunami hazard valuation using spatial tools for Kuala Muda, Kedah, Malaysia. Disaster Advances, 2 (3). 5 -14. ISSN 0974-262X

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Abstract

Remote sensing technology has great potential for analyzing damages attributed to tsunami impacts in coastal areas. The Indonesian tsunami, triggered by a massive undersea earthquake registering 9.0 on the Richter scale on December 26, 2004, was regarded as the worst case scenario since the Great Chilean Tsunami in 1960. This Indonesian tsunami had caused extensive damages to many countries in Asia including Malaysia. In this study, Kuala Muda, Kedah, Malaysia was selected as the study site to conduct valuation of tsunami affected areas using spatial tools. It has adopted three change detection techniques - image difference, image ratio and pre-post classification comparison to map out tsunami affected areas using SPOTS data sets acquired over two dates, one before and the other after the December 26, 2004 tsunami. However only the classification output change map was used for valuation of tsunami affected areas because it has higher accuracy. Contextual information - Digital Elevation Model (DEM) and texture were incorporated in the digital classification of the SPOTS datasets. The classification changes showed clearly the tsunami affected coastal features. A digitized cadastral lot map was superimposed on this change map and the damage valuation analysis, based on a model developed in this study, was then done on a lot by lot basis. Valuation was based solely on market land value determined by the valuation agency of Malaysia. Relevant damage statistics of this analysis were tabulated and plotted to show the extent and severity of damage of the individual land lots. This research has proven that SPOT-5, a moderate resolution sensor, was reliable in assessing tsunami damage valuation of the affected study area. Although the information generated was solely based on the market land value of individual cadastral lots, it nevertheless gave a generalised assessement for the purpose of computing compensation to be paid by the Government of Malaysia to the affected land owners.

Item Type:Article
Uncontrolled Keywords:change detection, damage assessment, Malaysia, satellite imagery classification, tsunami
Subjects:G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions:Others
ID Code:13162
Deposited By: Liza Porijo
Deposited On:20 Jul 2011 09:17
Last Modified:20 Jul 2011 09:17

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