Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Permeable Coastal Pavement Structure for Shore Protection and Removal of Non-point Source Pollutants

연안재해 방지 및 비점오염원 유출저감을 위한 투수블록의 특성 연구

  • Choi, Yun-Shik (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Kim, Jong-Yeong (Department of Civil and Environmental Engineering, Pusan National University) ;
  • Han, Sangsoo (SamhanC1 Corp.) ;
  • Kwon, Soonchul (Department of Civil and Environmental Engineering, Pusan National University)
  • 최윤식 (부산대학교 사회환경시스템공학과) ;
  • 김종영 (부산대학교 사회환경시스템공학과) ;
  • 한상수 ((주)삼한C1) ;
  • 권순철 (부산대학교 사회환경시스템공학과)
  • Received : 2019.11.01
  • Accepted : 2019.11.27
  • Published : 2019.12.30
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Abstract

Due to climate change, coastal areas are being flooded with torrential rain, typhoons, and tsunamis. In addition, non-point source pollutants (NPSs) that accumulated on the ground, streets, and buildings during the dry season are washed off by rain and stormwater runoff, which adds to the damage associated with environmental pollution, e.g., pollution that makes its way into the ocean. Recently, low impact development (LID) has been considered as a means of controlling water circulation and NPSs. In the coastal area, permeable blocks have been constructed mainly to reduce the flood damage caused by waves. Some important design factors that must be considered to ensure long-term performance are the permeability coefficient, clogging, and the efficiency of the removal of total suspended solids (TSS), but currently there are no standardized design criteria or testing techniques that are used worldwide. Herein, we analyzed the permeability coefficient and the TSS removal efficiency tendency according to the permeability area ratio with an easily-detachable, permeable block filled with calcinated yellow soils as the filter media. Our lab-scale tests indicated that, when the permeability area ratio was 25%, the reduction of the permeability coefficient after clogged was 11%, which was a significant decrease compared to other cases. Permeability persistence increased when the permeability area ratio increased from 50% to 75%. The TSS removal efficiency decreased as the permeability area ratio increased. Our pilot-scale test indicated that the TSS removal efficiency was more than 80% higher in all cases. We also found that the permeability persistence was excellent as the permeability area ratio increased, and, in actual construction, it is effective to set 5.3% of the total area as permeable area in terms of permeability and economic feasibility.

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References

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