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Monitoring Variation of Tidal Channels associated with Shihwa Reclamation Project using Remote Sensing Approaches

원격탐사기반 시화호 간척사업과 갯골변화 관찰

  • Park, Chanhyeok (Department of Astronomy, Space Science, & Geology, Chungnam National University) ;
  • Yu, Jaehyung (Department of Geological Sciences, Chungnam National University) ;
  • Kim, Jieun (Department of Astronomy, Space Science, & Geology, Chungnam National University) ;
  • Yang, Dong-Yoon (Geo-Environmental Hazard & Quaternary Geology Research Center, Korea Institute of Geoscience and Mineral Resources)
  • 박찬혁 (충남대학교 우주.지질학과) ;
  • 유재형 (충남대학교 지질환경과학과) ;
  • 김지은 (충남대학교 우주.지질학과) ;
  • 양동윤 (한국지질자원연구원 지질환경재해연구센터)
  • Received : 2019.08.12
  • Accepted : 2019.08.27
  • Published : 2019.08.28

Abstract

This study analyzed variation of tidal channels associated with Shihwa reclamation project for corresponding observation period based on remote sensing approaches. The project period was subdivided to developing period, closed period, and open period based on developing and management plan of Shiwa lake, and number, length, width, and direction of tidal channels for each period were analyzed using CORONA, Landsat 5 TM, Landsat 7 ETM+, and orthorectified aerial photographs. Number of tidal channels decreased from developing to opening period while $3^{rd}$ order channles did not show noticeable changes. The length of tidal channels decreased during developing to closed period, and increasing trend of $2^{nd}$ and $3^{rd}$ order channels was observed for the opening period. The average widtrh of $2^{nd}$ and $3^{rd}$ order channels decreased from developing to closed period, and increased during open period. The direction of tidal channels showed NW and NE direction in general, while the rose diagram showed deacrased frequency of NE direction and increased frequency of NW direction during the open period. These variations in tidal channels are considered to be related to changes in tidal energy environment, where stable energy environment before the project was changed to disconnection of tidal energy by closed environment, and re-connection of the energy during the open period.

Keywords

Shihwa;reclamation project;tidal channels;variation;remote sensing

Acknowledgement

Supported by : 충남대학교

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