Land Cover Change of Nagasaki City Associated with Natural Disasters by Using Remote Sensing Techniques

概要

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Natural disasters are inevitable and it is almost impossible to fully recover the damage caused by the disasters. However, it is possible to reduce the potential risk by developing disaster early warning strategies and to help in rehabilitation and post disaster reduction. Remote sensing technology has efficiently proven its usefulness, not only monitoring the disastrous events, but also to provide accurate and timely information well before the occurrence of disaster. This paper describes an analysis of land cover changes between 1986 and 2000, that have occurred in Nagasaki City over the past few decades. For this purpose, Nagasaki City was studied using Thematic Mapper (TM) data acquired by Landsat-5. Common and reputable unsupervised classification method, Iterative Self-Organizing Data Analysis Technique (ISODATA) is used. From the over all result of study area, it is visible that regelated area is decreasing and urban land is increasing. This trend is especially clear in detailed analysis of typically developed areas as Tagonoura, Koebaru and Kaminoshima.
長崎大学の論文