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2023 Vol.56, Issue 6 Preview Page

Research Article

Analysis of effects of drought on water quality using HSPF and QUAL-MEV

HSPF 및 QUAL-MEV를 이용한 가뭄이 수질에 미치는 영향 분석

Sangung Leea
,
Bugeon Job
,
Young Do Kimc*
,
Joo-Heon Leed
이 상웅a
,
조 부건b
,
김 영도c*
,
이 주헌d
aMaster Student, Department of Civil and Environmental Engineering, Myongji University, Yongin, Korea
bPh.D. Student, Department of Civil and Environmental Engineering, Myongji University, Yongin, Korea
cProfessor, Department of Civil and Environmental Engineering, Myongji University, Yongin, Korea
dProfessor, Department of Civil Engineering, Joongbu University, Goyang, Korea
a명지대학교 토목환경공학과 석사과정
b명지대학교 토목환경공학과 박사과정
c명지대학교 토목환경공학과 교수
d중부대학교 토목공학과 교수
*Corresponding Author
30 June 2023. pp. 393-402
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Abstract

Drought, which has been increasing in frequency and magnitude due to recent abnormal weather events, poses severe challenges in various sectors. To address this issue, it is important to develop technologies for drought monitoring, forecasting, and response in order to implement effective measures and safeguard the ecological health of aquatic systems during water scarcity caused by drought. This study aimed to predict water quality fluctuations during drought periods by integrating the watershed model HSPF and the water quality model QUAL-MEV. The researchers examined the SPI and RCP 4.5 scenarios, and analyzed water quality changes based on flow rates by simulating them using the HSPF and QUAL-MEV models. The study found a strong correlation between water flow and water quality during the low flow. However, the relationship between precipitation and water quality was deemed insignificant. Moreover, the flow rate and SPI6 exhibited different trends. It was observed that the relationship with the mid- to long-term drought index was not significant when predicting changes in water quality influenced by drought. Therefore, to accurately assess the impact of drought on water quality, it is necessary to employ a short-term drought index and develop an evaluation method that considers fluctuations in flow.

Keywords
Environmental drought
HSPF
QUAL-MEV
Changes of water quality

최근 이상기후 현상으로 발생빈도 및 규모가 증가한 가뭄은 다양한 분야에서 극심한 문제를 유발하여 가뭄에 의한 물부족 발생 시 수생태 건강성 확보를 위한 합리적인 대응 방안을 마련하기 위해 가뭄 감시, 전망 및 대응기술 개발이 필요하다. 본 연구에서는 유역모델 HSPF와 수질모델 QUAL-MEV를 연계하여 가뭄 기간 물 부족 상태가 수문 순환을 통해 변동되는 수질을 예측하였다. SPI, RCP 4.5 시나리오를 검토하고 HSPF 및 QUAL-MEV를 활용하여 유량변동에 따른 수질변화를 모의하여 유량변동에 따른 수질 변화를 분석하였다. 갈수기 유량과 수질의 관계는 높으나 강수량과 수질의 관계는 미비한 것으로 나타났다. 유량 및 SPI6는 상이한 경향이 나타나 가뭄의 영향으로 변화되는 수질 예측시 중장기 가뭄지수와 관계는 미비한 것으로 나타났다. 가뭄에 의한 수질 영향을 평가하기 위해 단기간의 가뭄지수 활용 및 유량 변동에 따른 평가방안 마련이 필요한 것으로 사료된다.

키워드
환경가뭄
HSPF
QUAL-MEV
수질 변화
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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 : 56
  • No :6
  • Pages :393-402
  • Received Date : 2023-02-07
  • Revised Date : 2023-05-29
  • Accepted Date : 2023-06-07
  • DOI :https://doi.org/10.3741/JKWRA.2023.56.6.393
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