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2024 Vol.51, Issue 1 Preview Page

Engineering

Estimating the rating curve of irrigation canals in the Cheongju Sindae area
Mikyoung Choi1
,
Inhyeok Song2
,
Heesung Lim3
,
Hansol Kang2
,
Hyunuk An2*
1Division for Integrated Water Management, Korea Environment Institute, Sejong 30147, Korea
2Department of Agricultural and Rural Engineering, Chungnam National University, Daejeon 34134, Korea
3Rural Research Institute or Agricultural and Fisheries Research Institute, Korea Rural Community Corporation, Naju 58327, Korea
*Corresponding Author
1 March 2024. pp. 79-86
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Abstract

As the frequency and intensity of heavy rains increase, the vulnerability of agriculture to disasters also increases. Consequently, there is a need to improve flood and inundation predictions. To enhance the accuracy of inundation predictions, it is essential to monitor water level and discharge data within agricultural areas. This study was conducted to monitor water levels and rainfall in the Cheongju Sindae area from 2022 to 2023, and the data was utilized as input and validation data for agricultural inundation modeling. Four irrigation drainage canals were installed to a square-shaped concrete structure where the water level gauge is. It was then confirmed that the water level rises with rainfall. The flow velocities were monitored during periods of heavy rainfall. The rating curve, which estimates water level and flow velocity based on observations, was estimated using the software K-HQ. The resulting curve was presented with the Coefficient of Determination (R2). K-HQ was also used to calculate the equation for the rating curve, taking outliers into account at each data point. Outliers were extracted and the rating curve was recalculated. As the coefficient of determination of three out of four stations exceeded 0.95, the estimated rating curve may be considered reliable for discharge estimation. This study provides critical data for enhancing agricultural inundation modeling accuracy and drainage improvement projects.

Keywords
discharge
irrigation drainage canal
K-HQ
rating curve
water level
References
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Information
  • Publisher :Institute of Agricultural Science, Chungnam National University
  • Publisher(Ko) :충남대학교 농업과학연구소
  • Journal Title :Korean Journal of Agricultural Science
  • Journal Title(Ko) :농업과학연구
  • Volume : 51
  • No :1
  • Pages :79-86
  • Received Date : 2023-11-03
  • Revised Date : 2023-12-08
  • Accepted Date : 2023-12-27
  • DOI :https://doi.org/10.7744/kjoas.510107
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