Possible origin of coastal sands and their long-term distribution along the high slope-gradient, wave-dominated eastern coast, Korea

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• 作者：Sang Hoon Lee (1)
  Hee Jun Lee (1)
  Jun-Yong Park (1)
  Eui Young Jeong (1)
  Jeseon Yoon (1)
  Ho Kyung Ha (2)
  Chang Woong Shin (1)
  Chanhong Park (1)
  
• 关键词：coastal sands ; source ; distribution ; sediment transport ; East Sea
• 刊名：Geosciences Journal
• 出版年：2013
• 出版时间：June 2013
• 年：2013
• 卷：17
• 期：2
• 页码：163-172
• 全文大小：1454KB
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• 作者单位：Sang Hoon Lee (1)
  Hee Jun Lee (1)
  Jun-Yong Park (1)
  Eui Young Jeong (1)
  Jeseon Yoon (1)
  Ho Kyung Ha (2)
  Chang Woong Shin (1)
  Chanhong Park (1)
  
  1. Korea Institute of Ocean Science and Technology, Ansan, 425-600, Republic of Korea
  2. Korea Polar Research Institute, Incheon, 406-840, Republic of Korea
  
• ISSN：1598-7477

文摘

This study aims to investigate possible source and long-term distributional patterns of coastal sands in the high slope-gradient, wave-dominated coast with no large rivers, eastern Korea. Chirp (2- kHz) seismic profiles show that the coastal sand deposits, the uppermost transparent layer, are up to 7.1 m thick off small, mountainous stream mouths, and thins laterally, showing a radial distribution from the stream mouths with a slightly SE-skewed elongated (i.e., alongshore) geometry. These features suggest that the terrigenous coarse sediments emptied by the streams during the summer flash flooding season have been a major source to the adjacent coastal sands. Hydrodynamic measurements with benthic tripod systems indicate that alongshore currents occurring during episodic storms play a significant role in the displacement of the coastal sands toward the southeast, resulting in the slightly SE-skewed elongated (i.e., alongshore) distributional geometry of the sands.