한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제55권1호
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  • Pages.1-10
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  • 2022
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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농업유역의 논 관개 회귀수량 추정

Estimation of irrigation return flow from paddy fields on agricultural watersheds

  • 김하영 (한경대학교 사회안전시스템공학부) ;
  • 남원호 (한경대학교 사회안전시스템공학부) ;
  • 문영식 (한경대학교 국가농업용수연구센터) ;
  • 안현욱 (충남대학교 지역환경토목학과) ;
  • 김종건 (강원대학교 농업생명과학대학 지역건설공학과) ;
  • 신용철 (경북대학교 농업생명과학대학 농업토목.생물산업공학부) ;
  • 도종원 (한국농어촌공사 농어촌연구원 통합물관리지원단) ;
  • 이광야 (충남대학교 농업과학연구소)
  • Kim, Ha-Young (School of Social Safety and Systems Engineering, Hankyong National University) ;
  • Nam, Won-Ho (School of Social Safety and Systems Engineering, Institute of Agricultural Environmental Science, National Agricultural Water Research Center, Hankyong National University) ;
  • Mun, Young-Sik (National Agricultural Water Research Center, Hankyong National University) ;
  • An, Hyun-Uk (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • Kim, Jonggun (Department of Regional Infrastructure Engineering, Kangwon University) ;
  • Shin, Yongchul (School of Agricultural Civil and Bio-Industrial Engineering, Kyungpook National University) ;
  • Do, Jong-Won (Integrated Water Management Supporting Department, Water Resources Planning Office, Korea Rural Community Corporation) ;
  • Lee, Kwang-Ya (Institute of Agricultural Science, Chungnam National University)
  • 투고 : 2021.07.19
  • 심사 : 2021.10.14
  • 발행 : 2022.01.31
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초록

논으로 공급되는 관개용수는 필지에서의 증발산량 및 지하침투량과 용배수로를 통한 자연적 및 인위적인 배수량으로 소비된다. 관개 회귀수량은 관개를 통해 농경지에 공급된 수량 중에서 증발산에 의해 소비되지 않고 침투 또는 배수 등을 통해 하천으로 회귀되는 수량이다. 논 관개 회귀수량은 농업용수의 건전한 물순환 관리에 중요한 역할을 하며, 유역의 용수공급계획, 하천유황의 예측, 관개용수의 사용량 결정, 하천수질관리 및 농업유역의 수문모델링 등에 중요한 인자로 작용한다. 본 연구에서는 강원도 원주시 흥업저수지를 대상으로 단일 수원공 및 농업유역 단위의 회귀율을 추정하기 위하여 2017년부터 2020년까지 모니터링 및 EPA-SWMM (Environmental Protection Agency-Storm Water Management Model) 모델링을 수행하였다. 기상자료, 저수율, 관개수로 실측 유량자료를 입력하여 평야부의 관개수로 네트워크 모델 기반 SWMM 모델링을 수행하였으며, 용배수로별 공급량과 배수량을 산정하였다. 2020년 실측 저수율, 용배수로 유량 모니터링 데이터를 활용하여 SWMM 모델의 적용성을 검증하였으며, 평야부 수혜면적의 용배수로 네트워크를 구성하여 저수지로부터 공급된 관개량 중 배수로를 통해 하천으로 유입되는 신속회귀수량 및 회귀율을 추정하였다. 흥업저수지의 회귀수량 산정 결과 2017년부터 2020년까지의 연평균 신속회귀수량 및 회귀율은 각각 2,407,000 m3, 53.1%로 추정되었으며, 대상 저수지의 시점부 및 취입보 공급량, 수로부 배수량, 회귀수량 산정 결과를 활용하여 소규모 단일유역인 농촌유역의 물순환 특성 분석을 수행하였다.

Irrigation water supplied to the paddy field is consumed in the amount of evapotranspiration, underground infiltration, and natural and artificial drainage from the paddy field. Irrigation return flow is defined as the excess of irrigation water that is not consumed by evapotranspiration and crop, and which returns to an aquifer by infiltration or drainage. The research on estimating the return flow play an important part in water circulation management of agricultural watershed. However, the return flow rate calculations are needs because the result of calculating return flow is different depending on irrigation channel water loss, analysis methods, and local characteristics. In this study, the irrigation return flow rate of agricultural watershed was estimated using the monitoring and SWMM (Storm Water Management Model) modeling from 2017 to 2020 for the Heungeop reservoir located in Wonju, Gangwon-do. SWMM modeling was performed by weather data and observation data, water of supply and drainage were estimated as the result of SWMM model analysis. The applicability of the SWMM model was verified using RMSE and R-square values. The result of analysis from 2017 to 2020, the average annual quick return flow rate was 53.1%. Based on these results, the analysis of water circulation characteristics can perform, it can be provided as basic data for integrated water management.

키워드

과제정보

본 연구는 농림축산식품부의 재원으로 한국농어촌공사의 2020년 용역연구사업의 지원을 받아 연구되었음.

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