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2021 Vol.8, Issue 4 Preview Page

Original Article

Determination of Stream Reach for River Environment Assessment System Using Satellite Image

위성영상을 활용한 하천환경 평가 세구간 설정

Woochul Kang1*
,
Hun Choe2
,
Eun-kyung Jang3
,
Dongwoo Ko4
,
Joongu Kang5
,
Hongkoo Yeo6
강 우철1*
,
최 훈2
,
장 은경3
,
고 동우4
,
강 준구5
,
여 홍구6
1Research Specialist, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
2Master, Department of Social Studies Education, Chonnam National University, Guangju 61186, Korea
3Research specialist, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
4Research Professor, Department of Civil Engineering, Kyungsung University, Busan 48434, Korea
5Research Fellow, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
6Senior Research Fellow, Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology, Goyang 10223, Korea
1한국건설기술연구원 전임연구원
2전남대학교 사회교육학과 석사
3한국건설기술연구원 전임연구원
4경성대학교 연구교수
5한국건설기술연구원 연구위원
6한국건설기술연구원 선임연구위원
*Corresponding Author
31 December 2021. pp. 179-193
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Abstract

This study examines the use of satellite images for river classification and determination of stream reach, which is the first priority in the river environment assessment system. In the river environment assessment system used in South Korea, it is proposed to set a stream reach by using 10 or 25 times the width of the river based on the result of river classification. First, river classification for the main stream section of Cheongmi stream was performed using various river-related data. The maximum likelihood method was applied for land cover classification. In this study, Sentinel-2 satellite imagery, which is an open data technology with a resolution of 10 m, was used. A total of four satellite images from 2018 was used to consider various flow conditions: February 2 (daily discharge = 2.39 m3/s), May 23 (daily discharge = 15.51 m3/s), June 2 (daily discharge = 3.88 m3/s), and July 7 (daily discharge = 33.61 m3/s). The river widths were estimated from the result of land cover classification to determine stream reach. The results of the assessment reach classification were evaluated using indicators of stream physical environments, including pool diversity, channel sinuosity, and river crossing shape and structure. It is concluded that appropriate flow conditions need to be considered when using satellite images to set up assessment segments for the river environment assessment system.

Keywords
Land cover classification
River environment assessment system
Satellite image
Stream reach for assessment system
Stream classification

본 연구에서는 하천환경 평가체계에서 가장 우선적으로 이루어지는 하천 유형화 및 세구간 설정 작업을 위해 위성영상의 활용방안을 검토하였다. 국내 하천 환경 평가체계의 경우 하천 유형화 결과에 따라 저수로 폭의 10배 또는 20배를 기준으로 평가 세구간을 설정하기를 제안한다. 연구수행을 위해 청미천 본류를 대상으로 하천 관련 기본자료들을 이용하여 하천 유형화작업을 수행하였으며, 이후 위성영상에 최적분류법을 적용하여 토지피복분류를 수행하였다. 위성영상의 경우 10 m 해상도의 개방형 자료인 Sentiel-2를 이용하였으며, 다양한 유량 조건을 고려하기위해 총 4개의 위성영상자료를 이용하였다: 2018년 2월 2일 (일유량 = 2.39 m3/s), 5월 23일 (일유량 = 15.51 m3/s), 6월 2일 (일유량 = 3.88 m3/s), 7월 7일 (일유량 = 33.61 m3/s). 토지피복분류 결과로부터 저수로 폭을 획득하였으며, 결과를 통해 하천환경평가를 위한 세구간을 설정하였다. 세구간 설정 결과는 하천 환경 물리적 지표 중 소의 다양성, 사행도, 하천횡단 형상, 하천횡단구조물에 대한 평가를 통해 검토되었다. 본 연구를 통해 하천환경 평가시스템을 위한 세구간 설정에 위성영상을 활용하는 경우 유량 조건에 대한 충분한 고려가 필요할 것으로 판단된다.

키워드
토지피복분류
하천환경 평가시스템
위성영상
하천환경평가 세구간
하천 유형화
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Information
  • Publisher :Korean Society of Ecology and Infrastructure Engineering
  • Publisher(Ko) :응용생태공학회
  • Journal Title :Ecology and Resilient Infrastructure
  • Journal Title(Ko) :응용생태공학회 논문집
  • Volume : 8
  • No :4
  • Pages :179-193
  • Received Date : 2021-10-12
  • Revised Date : 2021-11-08
  • Accepted Date : 2021-11-28
  • DOI :https://doi.org/10.17820/eri.2021.8.4.179
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