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2021 Vol.54, Issue 9 Preview Page

Research Article

Development of water quality and aquatic ecosystem model for Andong lake using SWAT-WET

SWAT-WET을 이용한 안동호의 수질 및 수생태계 모델 구축

Soyoung Wooa
,
Yongwon Kimb*
,
Wonjin Kimc
,
Sehoon Kimd
,
Seongjoon Kime
우 소영a
,
김 용원b*
,
김 원진c
,
김 세훈d
,
김 성준e
aPh.D Candidate, Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University, Seoul, Korea
bIntegrated Ph.D. Student, Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University, Seoul, Korea
cPh.D Candidate, Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University, Seoul, Korea
dPh.D Candidate, Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University, Seoul, Korea
eProfessor, Division of Civil and Environmental Engineering, College of Engineering, Konkuk University, Seoul, Korea
a건국대학교 일반대학원 사회환경플랜트공학과 박사수료
b건국대학교 일반대학원 사회환경플랜트공학과 석박사통합과정
c건국대학교 일반대학원 사회환경플랜트공학과 박사수료
d건국대학교 일반대학원 사회환경플랜트공학과 박사수료
e건국대학교 공과대학 사회환경공학부 교수
*Corresponding Author
30 September 2021. pp. 719-730
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Abstract

The objective of this study is to develop the water quality and aquatic ecosystem model for Andong lake using SWAT-WET (Soil and Water Assessment Tool-Water Ecosystem Tool) and to evaluate the applicability of WET. To quantify the pollutants load flowing into Andong lake, a watershed model of SWAT was constructed for Andong Dam basin (1,584 km2). The calibration results for Dam inflow and water quality loads (SS, T-N, T-P) were analyzed that average R2 was more than 0.76, 0.69, 0.84, and 0.60 respectively. The calibrated SWAT results of streamflow and nutrients concentration was used into WET input data. WET was calibrated and validated for water temperature, dissolved oxygen, and water quality concentration (T-N, T-P) of Andong lake. The WET calibrated results was analyzed that PBIAS was +19%, ‒13%, +4%, and +26.5% respectively and showed that it was simulated to a significant level compared with the observation data. The observed dry weight (gDW/m2) of zoobenthos was less than 0.5, but the average value of simulation was analyzed to be 0.8, which is because the WET model considers zoobenthos with a broader concept. Although accurate calibration is difficult due to the lack of observed data, SWAT-WET can analyze the effects of environmental change in the upstream watershed on the lake based on long-term simulation based on watershed model. Therefore, the results of this study can be used as basic data for managing the aquatic environment of Andong lake.

Keywords
Aquatic ecosystem modeling
Andong lake
Water quality
Zoobenthos
SWAT-WET

본 연구에서는 상류의 휴·폐광산을 비롯한 다양한 점오염원과 비점오염원으로부터 유실되는 오염물질의 영향을 받는 안동호를 대상으로 수질 및 수생태 모델인 SWAT-WET을 구축하고, 적용성을 평가하고자 한다. 안동호르 유입되는 오염물질에 대한 정량적인 평가를 위해 유역모델인 SWAT을 안동댐 유역(1,584 km2)을 대상으로 구축하여, 검보정을 수행하였다. 유출량과 수질 부하량(SS, T-N, T-P)에 대한 검보정 결과 R2는 각각 0.76, 0.69, 0.84, 0.60 이상으로 분석되었다. 검보정된 SWAT의 유출량과 영양물질의 농도를 WET의 입력자료로 적용하여 안동호에 대한 수질, 수생태 모델 WET을 구축하였다. WET의 매개변수 민감도 분석 결과를 이용하여, 안동호의 수온, 용존산소, 수질농도(T-N, T-P)를 대한 검보정을 수행하였다. 검보정 결과 PBIAS는 각각 +19%, -13%, +4%, +26.5% 로 분석되었으며, 관측 자료를 유의한 수준으로 모의하는 것을 확인하였다. 저서동물의 관측 건중량(gDW/m2)은 0.5 이하였으나 모의 건중량의 평균은 0.8로 분석되었으며, 이는 WET 모델이 더 넓은 개념의 저서동물을 고려하기 때문으로 나타났다. 관측자료 부족으로 정확한 검보정은 어렵지만, 유역모델과의 연계를 통한 장기간 모의와 상류 유역환경변화가 호소에 미치는 영향을 분석할 수 있으므로 안동호의 수환경 관리를 위한 기초 자료로 활용될 수 있을 것으로 판단된다.

키워드
수생태 모델링
안동호
수질
저서동물
SWAT-WET
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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 : 54
  • No :9
  • Pages :719-730
  • Received Date : 2021-06-07
  • Revised Date : 2021-07-19
  • Accepted Date : 2021-07-19
  • DOI :https://doi.org/10.3741/JKWRA.2021.54.9.719
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