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Seasonal Variations of Iho and Hamdeok Beach Sediments in the Jeju Island, Korea  

Youn, Jeung-Su (College of Ocean Sciences, Cheju National University)
Park, Yong-Seung (Jeju Science High School)
Kim, Tae-Joung (College of Ocean Sciences, Cheju National University)
Park, Sang-Woon (College of Ocean Sciences, Cheju National University)
Publication Information
Economic and Environmental Geology / v.41, no.2, 2008 , pp. 243-252 More about this Journal
Abstract
The Iho and Hamdeok beaches, the major coastal beaches in Jeju Island, have been studied through size analysis and using an experimental extension pole and sediment trap in beach profile, in order to understand their textural characteristics, migration patterns, and seasonal change in beach geometry. The Iho beach is composed of coarse and medium sands, 590 m in total length. The foreshore slope is 12.3$^{\circ}$ in summer and 10.8$^{\circ}$ in winter, which shows more steeper in summer. The Hamdeok beach consisting mostly of shell fragments is 950 m long, $5.7{\sim}7.4^{\circ}$ steep and 97.4${\sim}$114.5 m wide, respectively. The suspended load drift concentrations in the studied beaches showed 4.5 mg/l during the period of summer and 33.2 mg/l in winter, and those of fine-grained sediments are derived mostly from the marine of northeastward direction. The typical beach transformation of the Iho beach is resulting from the construction of jetties in the west side that built up the sand inside the jetties, whereas the erosion is occurring on the east side of beach. The center and berm sides of the sand in the Hamdeok beach drift into the dune side during the period of the stormy winter season.
Keywords
beach profile; beach geometry deformation; Iho and Hamdeok beaches;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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