Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Analysis of Water Loss Rate and Irrigation Efficiency in Irrigation Canal at the Dong-Jin District

동진지구 관개용수로의 손실률 및 관개효율 분석

  • Hong, Eun-Mi (USDA-ARS Environmental Microbial & Food Safety Laboratory, Beltsville Agricultural Research Center) ;
  • Choi, Jin-Yong (Department of Rural Systems Engineering and Research Institute for Agriculture & Life Sciences, Seoul National University) ;
  • Nam, Won-Ho (National Drought Mitigation Center, School of Natural Resources, University of Nebraska-Lincoln) ;
  • Lee, Sang-Hyun (Institute for Agriculture & Life Sciences, Seoul National University) ;
  • Choi, Jin-Kyu (Department of Rural Construction Engineering, Chonbuk National University) ;
  • Kim, Jin-Taek (Rural Research Institute, Korea Rural Community Corporation)
  • Received : 2014.12.23
  • Accepted : 2015.03.13
  • Published : 2015.03.31
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Abstract

The purpose of this study is to evaluate the paddy irrigation efficiency using real-time water level monitoring data and intermittent irrigation model in Gimjae, Dong-Jin irrigation district. For this study, the real-time water level data in Gimjae main canal and other secondary canals were collected from 2012 to 2014 and converted to daily discharge using rating curve in each canal. From intermittent irrigation model in paddy, irrigation water requirement was estimated and irrigation efficiency was calculated. The average amount of irrigation water supply per unit irrigation area was 1,011 mm in Gimjae main canal for 12,749 ha irrigation area, 1,011 mm in the secondary canal of upper region and 1,470 mm in the secondary canal of lower region. The median irrigation loss was 43 % in Gimjae main canal, 25 % in secondary canal of upper region and 35 % in the secondary canal of lower region. The larger irrigation area is, the irrigation loss rates tend to decrease in secondary canals. Monthly median irrigation losses in upper region were 10 (June) - 40 % (September) and those in lower region were 25 (May) to 40 % (April, June, August, and September). The results of canal management loss can be available as the basic data for irrigation water management and estimating guideline of optimal irrigation water supply to improve agricultural water use efficiencies.

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References

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