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2020 Vol.53, Issue 7 Preview Page

Research Article

A feasibility modeling of potential dam site for hydroelectricity based on ASTGTM DEM data

ASTGTM 전지구 DEM 기반의 수력발전댐 적지분석 사전모델링

Wonjin Janga
,
Yonggwan Leeb
,
Seongjoon Kimc*
장 원진a
,
이 용관b
,
김 성준c*
aIntegrated Ph.D. student, Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University
bPh.D. Candidate, Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University
cProfessor, School of Civil and Environmental Engineering, College of Engineering, Konkuk University
a건국대학교 일반대학원 사회환경플랜트공학과 석박사통합과정
b건국대학교 일반대학원 사회환경플랜트공학과 박사수료
c건국대학교 공과대학 사회환경공학부 교수
* Corresponding Author
31 July 2020. pp. 545-555
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Abstract

A feasibility modeling for potential hydroelectric dam site selection was suggested using 1 sec ASTGTM (ASTER Global Digital Elevation Model) and Terra/Aqua MODIS (Moderate Resolution Imaging Spectroradiometer) derived land use (MCD12Q1) data. The modeling includes DEM pre-processing of peak, sink, and flat, river network generation, watershed delineation and segmentation, terrain analysis of stream cross section and reservoir storage, and estimation of submerged area for compensation. The modeling algorithms were developed using Python and as an open source GIS. When a user-defined stream point is selected, the model evaluates potential hydroelectric head, reservoir surface area and storage capacity curve, watershed time of concentration from DEM, and compensation area from land use data. The model was tested for 4 locations of already constructed Buhang, BohyunMountain, Sungdeok, and Yeongju dams. The modeling results obtained maximum possible heads of 37.0, 67.0, 73.0, 42.0 m, surface areas of 1.81, 2.4, 2.8, 8.8 km2, storages of 35.9, 68.0, 91.3, 168.3×106 m3 respectively. BohyunMountain and Sungdeok show validity but in case of Buhang and Yeongju dams have maximum head errors. These errors came from the stream generation error due to ASTGTM. So, wrong dam watershed boundary limit the head. This study showed a possibility to estimate potential hydroelectric dam sites before field investigation especially for overseas project.

Keywords
ASTGTM
DEM
Hydroelectric dam
MCD12Q1
Site analysis

본 연구에서는 해외 수력댐 건설 프로젝트의 사전조사 기초자료 제공을 위하여 댐 위치 결정을 위한 사전적지분석 알고리즘을 개발하고, 위성영상 수치표고자료인 ASTER Global Digital Elevation Model (ASTGTM)과 토지피복자료인 Terra/Aqua combined Moderate Resolution Imaging Spectroradiometer (MODIS) MCD12Q1를 사용하였다. 사전적지분석 알고리즘은 DEM의 전처리, 하천망생성, 유역분할과 지형정보를 고려한 적지분석과 댐 건설 시 수몰면적에 따른 보상면적 산정 알고리즘을 포함하고 있으며 Python기반의 오픈소스 GIS로 구현되었다. 적지분석은 사용자가 하천 위의 지점을 선택하면, DEM으로부터 낙차, 도달시간, 내용적곡선과 같은 지형정보와 토지피복자료를 통한 보상면적을 기반으로 지점의 적지여부를 평가한다. 분석알고리즘은 국내 부항, 보현산, 성덕, 영주댐을 대상으로 시범적용 됐으며 해당 지점의 가능 최대낙차는 각각 37, 67, 73, 42 m로 나타났으며 최대저수면적은 1.81, 2.4, 2.8, 8.8 km2 최대저수량은 35.9, 68, 91.3, 168.3×106 m3으로 나타났다. 보현산과 성주 댐에서는 타당성을 보였으나, 부항과 영주 댐의 경우 ASTGTM 에러로 인한 잘못된 하천망과 유역경계로 인해 낙차가 제한됨을 보였다, 본 연구의 결과는 향후 해외 수력댐 사업 진출시 사전분석에서 적지의 지형학적 평가에 도움이 될 것으로 기대된다.

키워드
ASTGTM
수치표고자료
MCD12Q1
적지분석
수력발전댐
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 53
  • No :7
  • Pages :545-555
  • Received Date : 2020-05-20
  • Revised Date : 2020-06-02
  • Accepted Date : 2020-06-02
  • DOI :https://doi.org/10.3741/JKWRA.2020.53.7.545
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