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2022 Vol.55, Issue 1

Research Article

Estimation of irrigation return flow from paddy fields on agricultural watersheds

농업유역의 논 관개 회귀수량 추정

Ha-Young Kima
,
Won-Ho Namb*
,
Young-Sik Munc
,
Hyun-Uk And
,
Jonggun Kime
,
Yongchul Shinf
,
Jong-Won Dog
,
Kwang-Ya Leeh
김 하영a
,
남 원호b*
,
문 영식c
,
안 현욱d
,
김 종건e
,
신 용철f
,
도 종원g
,
이 광야h
aMaster Student, School of Social Safety and Systems Engineering, Hankyong National University, Anseong, Korea
bAssociate Professor, School of Social Safety and Systems Engineering, Institute of Agricultural Environmental Science, National Agricultural Water Research Center, Hankyong National University, Anseong, Korea
cResearcher, National Agricultural Water Research Center, Hankyong National University, Anseong, Korea
dAssociate Professor, Department of Agricultural and Rural Engineering, Chungnam National University, Daejeon, Korea
eAssistant Professor, Department of Regional Infrastructure Engineering, Kangwon University, Chuncheon, Korea
fAssociate Professor, School of Agricultural Civil and Bio-Industrial Engineering, Kyungpook National University, Daegu, Korea
gDeputy Director, Integrated Water Management Supporting Department, Water Resources Planning Office, Korea Rural Community Corporation, Sejong, Korea
hResearch Professor, Institute of Agricultural Science, Chungnam National University, Daejeon, Korea
a한경대학교 사회안전시스템공학부 석사과정
b한경대학교 사회안전시스템공학부 부교수
c한경대학교 국가농업용수연구센터 연구원
d충남대학교 지역환경토목학과 부교수
e강원대학교 농업생명과학대학 지역건설공학과 조교수
f경북대학교 농업생명과학대학 농업토목·생물산업공학부 부교수
g한국농어촌공사 농어촌연구원 통합물관리지원단 차장
h충남대학교 농업과학연구소 연구교수
*Corresponding Author
31 January 2022. pp. 1-10
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Abstract

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.

Keywords
Agricultural water
Agricultural watershed
Irrigation return flow
Return flow rate
Irrigation network system
SWMM (Storm Water Management Model)

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.

키워드
농업용수
농업유역
관개회귀수량
회귀율
관개수로
SWMM (Storm Water Management Model)
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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 : 55
  • No :1
  • Pages :1-10
  • Received Date : 2021-07-19
  • Revised Date : 2021-10-13
  • Accepted Date : 2021-10-14
  • DOI :https://doi.org/10.3741/JKWRA.2022.55.1.1
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