Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Comparative analysis of ONE parameter hydrological model on domestic watershed

ONE 모형의 국내유역 적용 및 비교 분석

  • Ko, Heemin (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • An, Hyunuk (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • Noh, Jaekyung (Department of Agricultural and Rural Engineering, Chungnam National University) ;
  • Lee, Seungjun (Landslides Research Center, Geologic Hazards Division, Korea Institute of Geoscience and Mineral Resources)
  • 고희민 (충남대학교 지역환경토목학과) ;
  • 안현욱 (충남대학교 지역환경토목학과) ;
  • 노재경 (충남대학교 지역환경토목학과) ;
  • 이승준 (한국지질자원연구원 지질재해연구본부 산사태 연구센터)
  • Received : 2023.10.17
  • Accepted : 2024.01.02
  • Published : 2024.01.31
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Abstract

Agricultural reservoirs supply water for various purposes such as irrigation, maintenance, and living. Since agricultural reservoirs respond sensitively to seasonal and climate changes, it is essential to estimate supply and inflow for efficient operation, and water management should be done based on these data. However, in the case of agricultural reservoirs, the measurement of supply and inflow is relatively insufficient compared to multi-purpose dams, and inflow-supply analysis in agricultural reservoirs through water balance analysis is necessary for efficient water management. Therefore, rainfall-runoff analysis models such as ONE model and Tank model have been developed and used for reservoir water balance analysis, but the applicability analysis for ungauged watersheds is insufficient. The ONE model is designed for daily runoff calculation, and the model has one parameter, which is advantageous for calibration and ungauged watershed analysis. In this study, the water balance was analyzed through the ONE model and the Tank model for 15 watersheds upstream of dams, and R2 and NSE were used to quantitatively compare the performance of the two models. The simulation results show that the ONE model is suitable for predicting the inflow of agricultural reservoirs with the ungauged watershed

농업용저수지는 관개용수, 유지용수, 생활용수 등 다양한 목적을 가지고 용수공급을 수행한다. 농업용저수지는 계절과 기후 변화에 민감하게 반응하기 때문에 효율적으로 운용하기 위해선 공급량 및 유입량 계측은 필수적이며, 이러한 자료를 바탕으로 용수관리가 합리적으로 이루어져야 한다. 하지만 농업용저수지의 경우 다목적 댐에 비해 공급량 및 유입량에 대한 계측이 상대적으로 미비한 실정이며, 효율적이고 합리적인 용수 관리를 위해선 물수지 분석을 통한 농업용 저수지에서의 유입량-공급량 분석이 필요하다. 이에 ONE model, Tank model과 같은 강우유출해석모형이 개발되어 저수지 물수지 해석에 활용되고있으나, 미계측 유역에 대한 적용성 분석은 미비한 실정이다. ONE model은 기본적으로 일단위 유출계산을 위해서 설계되었으며, 해당 모형은 하나의 매개변수를 가지고 있어 Tank model의 한계로 지적되는 보정 및 미계측 유역 분석에 유리하다. 이에 15개의 댐상류 유역을 대상으로 ONE model과 Tank model을 통해 물수지를 분석하고, 두 모형의 성능을 정량적으로 비교분석하고자 R2와 NSE을 활용하였다. 모의결과에 따르면, ONE model의 R2와 NSE가 Tank model 보다 높게 나타났으며, 이는 ONE model이 미계측유역에 대한 유입량 예측에 더 적합할 것으로 평가된다.

Keywords

Acknowledgement

This work was supported by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Agricultural Foundation and Disaster Response Technology Development Program (or Project), funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (321071-3)

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