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http://dx.doi.org/10.3741/JKWRA.2008.41.12.1163

A Study on the Sandbar and Vegetation Area Alteration at the Downstream of Dam  

Park, Bong-Jin (Korea Water Resourecs Corporation)
Jang, Chang-Lae (Korea Water Resourecs Corporation)
Lee, Sam-Hee (Research Fellow, Korea Institute of Construction Technology)
Jung, Kwan-Sue (Dept. of Civil Engineering, ChungNam National University)
Publication Information
Journal of Korea Water Resources Association / v.41, no.12, 2008 , pp. 1163-1172 More about this Journal
Abstract
In this study, area variation, index and degree of alteration, temporal variation of the sandbar and vegetation were analyzed using aerial photographs during the pre and post dam construction at the downstream of dam. Analysis result of the sandbar area was decreased 17 %. Sandbar area was 38 % of the channel areas at the pre dam, but 21 % at the post dam. Alteration indies of the sandbar were $-0.9921{\sim}2.9528$. Analysis result of the vegetation area was increased 13 %. Vegetation area was 11 % of the channel areas at the pre dam, but 24 % at the post dam. Alteration indies of the vegetation were $-0.8908{\sim}12.0736$. Temporal variation of the sandbar and vegetation were analyized at the An Dong dam, Im Ha dam, Hap Chun dam. Analysis result of the sandbar was decreased $42,600m^2$ per year, but vegetation was increased $51,700m^2$ per year. Sandbar area was decreasing more fast than vegetation area increasing.
Keywords
Sandbar; Vegetation; Index of Alteration; Degree of Alteration;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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