Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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A Study on Mixing Behavior of Dredging Turbidity Plume Using Two-Dimensional Numerical Model

이차원 수치모형을 이용한 준설 탁도플륨의 혼합거동 연구

  • Park, Jae Hyeon (Department of Civil and Urban Engineering, Inje University) ;
  • Kim, Young Do (Department of Environmental Science and Engineering (NRERC), Inje University) ;
  • Lee, Man Soo (Hyundai Engineering & Construction)
  • 박재현 (인제대학교 토목도시공학부) ;
  • 김영도 (인제대학교 환경공학부(낙동강유역환경연구센터)) ;
  • 이만수 (현대건설(주) 해외사업본부)
  • Received : 2012.12.02
  • Accepted : 2013.02.10
  • Published : 2013.02.28
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Abstract

The numerical simulations were performed to analyze the advection-diffusion processes of dredging-induced turbidity plume using RMA2 and RMA4 models in Bunam reservoir, Seosan, Chungnam. Field survey was also performed to measure the turbidity using the multi water quality monitoring system (YSI6600EDS). In the field survey, the vertical and horizontal distributions of the turbidity were measured during the dredging operation in Bunam reservoir. RMA2 model was used to simulate the velocity distributions in both the whole domain and the 2nd part of Bunam reservoir. RMA4 model was also used to simulate the concentration distribution in only the 2nd part of Bunam reservoir, where the dredging work were conducted. The comparison of the simulation results with the field data for the advection-diffusion of the turbidity plume using the concentration ratio concepts shows that the numerical model can be applied to analyze the environmental impact of dredging works.

본 연구에서는 충남 서산에 위치한 부남호에서 준설시 발생하는 탁도플륨의 이송 및 확산과정을 2차원 수치모형인 RMA2 모형과 RMA4 모형을 이용하여 예측하였으며, 다항목수질모니터링시스템(YSI6600EDS)을 이용해 측정한 탁도분포와 비교하였다. 현장조사에서는 부남호에서 준설작업이 진행됨에 따라 인근지점에서의 연직방향 탁도 분포를 측정하였으며 표층에서 거리에 따른 수평방향 탁도 분포를 측정하였다. 부남호 전 구간에 대해서 2차원 흐름해석 모형인 RMA2 모형을 적용하였고, 실제 준설작업이 이루어지는 2호지에 대해서 RMA2 모형과 RMA4 모형을 적용하였다. 준설지점의 초기 농도값에 대한 저수지 내 각 지점에서의 거리에 따른 농도비를 현장측정 결과와 비교한 결과, 수치해석에 의한 탁도플륨의 이송확산 모의 결과는 준설작업에 대한 환경영향 범위를 예측하는 데에 적용될 수 있는 것으로 나타났다.

Keywords

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