Detecting areal changes in tidal flats after sea dike construction using Landsat-TM images |
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Authors: | Moon Seong Kang Sang June Im Tae Il Jang Seung Woo Park Sang Min Kim |
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Institution: | 1.Department of Biosystems Engineering,Auburn University,Auburn,USA;2.Department of Forest Sciences/RIALS,Seoul National University,Seoul,Republic of Korea;3.Department of Rural Systems Engineering/RIALS,Seoul National University,Seoul,Republic of Korea;4.Department of Agricultural Engineering,Gyeongsang National University,Jinju, Gyeongnam,Republic of Korea |
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Abstract: | The main objective of this study was to estimate changes in the area of tidal flats that occurred after sea dike construction
on the western coast of South Korea using Landsat-TM images. Applying the ISODATA method of unsupervised classification for
Landsat-TM images, the tidal flats were identified, and the resulting areas were quantified for each image. The area of tidal
flats from a topographic map published in one year differs significantly from that shown in another, which appears to be attributable
to the tide levels at the time of aerial photography. During the study period, the area of tidal flats, as estimated from
Landsat-TM images, increased by 4.57 km2 per year in the study areas. The tidal flats in the inner sea of Chunsu Harbor area increased by 200 m2 per zone, while the accumulation for a number of inner sea areas within Asan Harbor area occurred at over 50m2 per zone. The results of this research may serve as the basis of an environmentallyfriendly development plan for tidal flats. |
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Keywords: | Tidal flat Landsat-TM image ISODATA sea dike topographic map |
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