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2019 Vol.52, Issue 11 Preview Page

Research Article

The remote-sensing based estimation of the evapotranspiration change due to the 2019 April Gangwon-do wildfire

2019년 강원도 산불로 인한 증발산 변화 원격탐사기반 추산

JiHyun Kima
,
Soyoung Sohnb
,
Yeonjoo Kimc*
김 지현a
,
손 소영b
,
김 연주c*
aResearch Professor, Department of Civil and Environmental Engineering, Yonsei University
bUndergraduate Student, Department of Civil and Environmental Engineering, Yonsei University
cAssociate Professor, Department of Civil and Environmental Engineering, Yonsei University
a연세대학교 건설환경공학과 연구교수
b연세대학교 건설환경공학과 학부생
c연세대학교 건설환경공학과 부교수
* Corresponding Author
30 November 2019. pp. 941-946
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Abstract

A wildfire could significantly alter the local hydrological regime, depending on the area and severity, and thus it is critical to understand its effect and feedback using data and simulation. For the wildfire in Gangwon-do on April 4-5, 2019, South Korea, we retrieved the Normalized-Burned Ratio (NBR) index using remote-sensing data (500-m 8-day MODIS surface reflectance data), and detect the damaged-area based on the difference in the NBR (dNBR) before and after the fire. The damaged area was 29.50 km2 in total, taking up 1.00-6.19% of five catchments. We then used remote-sensing data (500-m 8-day MODIS evapotranspiration data) and estimated that annual evapotranspiration (AET) would decrease as 0.05-1.56% over the five catchments, as compared to the pre-fire AET (2004-2018). This study highlights the importance of improving our understanding about the impact of wildfire on the local hydrological cycle.

Keywords
Wildfire
Remote-sensing technique
Evapotranspiration
Hydrological cycle
Water resource management

산불은 면적과 산불 강도에 따라 지역 수문환경을 중대하게 변화시킬 수 있는 중대한 요소이며, 따라서 측정자료와 모형모의를 통한 산불의 영향과 피드백을 이해하는 것은 중요하다. 본 연구에서는 2019년 4월 4-5일에 대한민국 강원도에서 발생한 산불을 원격탐사자료(8-일 500-m MODIS 지표면 반사율 자료)를 사용하여 계산한 정규탄화지수의 차이(dNBR)를 이용하여 탐지하였다. 그 결과, 산불피해 총면적은 5개의 표준유역에 걸쳐 29.50 km2에 달하였고, 유역 면적의 1.00-6.19%를 차지하는 것으로 나타났다. 또한, 원격탐사자료(8-일 500-m MODIS 증발산량 추산자료)를 사용하여 분석한 결과, 산불 이전(2004-2018년)과 비교하여 2019년의 연간 증발산량이 해당 5개 유역에서 0.05-1.56% 감소할 것이라고 추산하였다. 본 연구는 산불의 지역 수문 순환에 미치는 영향을 이해하는 데 중요하다.

키워드
산불
원격탐사 기법
증발산량
수문 순환
수자원 관리
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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 : 52
  • No :11
  • Pages :941-946
  • Received Date : 2019-07-31
  • Revised Date : 2019-09-27
  • Accepted Date : 2019-11-06
  • DOI :https://doi.org/10.3741/JKWRA.2019.52.11.941
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