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Seasonal Variation Patterns of Tidal Flat Sediments in Semi-enclosed Hampyong and Kwangyang Bays, West and South Coasts of Korea  

Ryu, Sang-Ock (Foculty of Earth Systems and Environmental Sciences, Chonnam National University)
Publication Information
Journal of the Korean earth science society / v.24, no.6, 2003 , pp. 578-591 More about this Journal
Abstract
To investigate the seasonal variation patterns of tidal flat sediments in semi-enclosed Hampyong and Kwangyang Bays, respectively west and south coasts of Korea, accumulation rate and grain-size in the sediments were monitored during 2${\sim}$4 years. The mud flats in the northern and eastern parts of Hampyong Bay were eroded in summer and deposited in winter, but mixed flats in the southern part of the bay show reversed seasonal variations to the mud flats. These variations are most likely connected with wave actions induced by monsoon and physiographic setting of the tidal flats in the bay. In contrast, the tidal flats of Kwangyang Bay were eroded in summer and deposited in other seasons except summer, different from the case of Hampyong Bay. The physiography of Kwangyang Bay are characterized by dominant flood tides and weak wave actions. However, in summer, the surface sediments were abruptly eroded by occasional typhoons and heavy rainfall. These weather conditions appear to be important factors to accelerate erosion on the tidal flat in semi-enclosed bays, south coast of Korea.
Keywords
semi-enclosed tidal flat; seasonal variation; monsoon climate; typhoon; heavy rainfall;
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