• Title/Summary/Keyword: Coastal engineering

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On the Behavior of Suspended Sediment near a Silt Screen and the Screen Efficiency in a Microtidal Coastal Area

  • Jin, Jae-Youll;Song, Won-Oh;Park, Jin-Soon;Chae, Jang-Won;Kim, Sung-En;Jeong, Weon-Mu;Yum, Ki-Dai;Oh, Jae-Kyung
    • Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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    • 2003.08a
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    • pp.344-352
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    • 2003
  • Sediment plumes arising from various coastal works can cause detrimental effects on the coastal ecosystem in various manners. Although the most active countermeasure against the plumes is to restrict the works to specified time periods known as environmental windows (Reine et al., 1998), silt screens have been widely used for reducing the spreading of suspended sediments (SS) generated by coastal works. (omitted)

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Estimation of the Efficiency of a Silt Screen using a Vessel-mounted ADCP

  • Jin, Jae-Youll;Park, Jin-Soon;Song, Won-Oh;Kim, Sung-En;Lee, Kwang-Soo;Yum, Ki-Dai;Oh, Jae-Kyung
    • Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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    • 2003.08a
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    • pp.353-358
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    • 2003
  • As fur quantitative evaluation of the amount of sediments released into the ambient waters by various works fur coastal development, the instrument and method of the measurement of suspended sediment concentration (SSC) are critical for estimating the efficiency of a silt screen to reduce the spreading of sediment plumes generated by coastal works. (omitted)

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Evaluation of Turbidity Generated by Cutter Suction and Grab Dredgers

  • Jin, Jae-Youll;Song, Won-Oh;Park, Jin-Soon;Kim, Sung-En;Oh, Young-Min;Yum, Ki-Dai;Oh, Jae-Kyung
    • Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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    • 2003.08a
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    • pp.179-184
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    • 2003
  • It is inevitable for dredging to increase the suspended sediment concentration (SSC) of the ambient waters in some degree, which has the potential to affect the coastal ecosystem in various manners. Thus, quantitative under- standing of dredging-induced sediment loss is essential fur the reliable environmental impacts assessment. (omitted)

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Development of a Real-Time Water Quality Monitoring System using Coastal Passenger Ships and PCS Telemetry

  • Jin, Jae-Youll;Park, Jin-Soon;Lee, Jong-Kuk;Park, Kwang-Soon;Lee, Dong-Young;Yum, Ki-Dai
    • Ocean and Polar Research
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    • v.21 no.2
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    • pp.117-126
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    • 1999
  • To meet increasing needs for environmentally sustainable management of coastal area, there has been compelling pressure to establish a cost-effective and long-term coastal water quality (CWQ) monitoring system. A remote CWQ monitoring system, STAMP, has been developed and is in operation along the route between Kyema harbor and Anma Island in the southwestern coastal area of Korea. STAMP uses a PCS phone as a telemetry unit to transmit acquired data for monitoring general water quality parameters, and a routinely operating coastal passenger ship or car ferry. STAMP has various merits of low-cost operations; long-term monitoring with secure instrumentation; and stable real-time telemetry of acquired data with-out the loss and noise. It is expected that the system will serve as a very useful tool in the CWQ managing programs of Korea taking the advantage of many coastal passenger ships in various routes including the ships departing from the coastal industrial cities. The acquired data compiled on suspended surface sediment concentrations (SSSC) will be also valuably helpful in understanding the sediment budget across the routes of the vessel.

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A Bed Schematized Two-dimensional Sediment Transport Model

  • Jin, Jae-Youll;Kim, Hyo-Seob;Lee, Kwang-Soo;Yum, Ki-Dai
    • Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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    • 1992.08a
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    • pp.158-165
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    • 1992
  • Bottom sediments, in various types of sediment transport models, have been usually assumed to be horizontally and/or vertically homogeneous. The assumption may be appropriate in well-sorted sedimentary environments including sand beaches and high turbid regions of fine grained cohesive sediments. (omitted)

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