Journal of the Korean Society for Marine Environment & Energy (한국해양환경ㆍ에너지학회지)

The Korean Society for Marine Environment and Energy (한국해양환경•에너지학회)
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The Intertidal Area in Lake Sihwa After Operation of the Tidal Power Plant

조력발전소 가동 후 시화호 내 조간대의 면적 변화

  • Kim, Minkyu (Biological Oceanography & Marine Biology Division, KIOST) ;
  • Koo, Bon Joo (Biological Oceanography & Marine Biology Division, KIOST)
  • 김민규 (한국해양과학기술원 생물연구본부) ;
  • 구본주 (한국해양과학기술원 생물연구본부)
  • Received : 2015.07.13
  • Accepted : 2015.08.21
  • Published : 2015.11.25
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Abstract

The intertidal area in Lake Sihwa formed after operation of Sihwa-Lake tidal power plant and the change of the area in Lake Sihwa by period were analyzed. For computation of the intertidal area, remote sensing techniques were applied and high resolution Digital Elevation Model (DEM) was generated with root mean square (rms) error 14.4 cm. The intertidal area was $165.1km^2$ in 1910s, $115.2km^2$ in 1991 before completion of Sihwa dyke, $5.6km^2$ in 2010 during the period on operation of sluice gate, and $20.3km^2$ in 2013 after operation of Sihwa tidal power plant. Intertidal in Lake Sihwa was nearly dissipated after completion of Sihwa dyke, but significantly increased with operation of Sihwa tidal power plant from April 2012 as developing a regular tide environment and increasing of sea water flux. The re-formation of tidal flat of Sihwa Lake is an uncommon case. This study that precisely analyzed on the area of artificially formed Sihwa tidal flat would be applicable for management and making conservation plan.

본 연구의 목적은 시화호 조력발전소 가동 후에 새롭게 형성된 시화호 조간대의 면적과 시기별 면적변화를 분석하는 것이다. 조간대 면적 분석을 위해 원격탐사기법을 이용하여 수치표고모델(Digital Elevation Model, DEM)을 추출하여 14.4 cm의 root mean square (rms) 오차를 갖는 정밀한 수준의 자료를 생산하였다. 시화호 조간대의 면적은 1910년대에는 $165.1km^2$, 방조제 완공 전인 1991년에는 $115.2km^2$, 2010년의 배수갑문 운영시기에는 $5.6km^2$, 조력발전소 가동 후인 2013년에는 $20.3km^2$의 시기별 변화를 보였다. 시화호 조간대는 시화방조제가 완공된 후에 거의 소멸되었으나, 2012년에 조력발전소가 가동되면서 규칙적인 조석환경 형성과 해수 유동량 증가로 인해 그 넓이가 크게 증가되었다. 조력발전소의 가동으로 형성된 시화호 조간대는 유례를 찾기 힘든 조간대 복원의 좋은 예이며, '훼손된 생태계 복원'의 전형적인 사례로서 활용될 수 있을 것이다.

Keywords

References

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