Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Impact of Water Management Techniques on Agricultural Reservoir Water Supply

관개지구 물관리기법에 따른 농업용 저수지 공급량 평가

  • Ryu, Jeong Hoon (Department of Rural Systems Engineering, Seoul National University) ;
  • Song, Jung Hun (Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Kang, Seok Man (Rural Research Institute, Korea Rural Community Corporation) ;
  • Jang, Jung Seok (Rural Research Institute, Korea Rural Community Corporation) ;
  • Kang, Moon Seong (Department of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, Institute of Green Bio Science and Technology, Seoul National University)
  • Received : 2018.01.12
  • Accepted : 2018.02.26
  • Published : 2018.03.31
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Abstract

Along with climate change, it is reported that the extreme climate events such as severe drought could cause difficulties of agricultural water supply. To minimize such damages, it is necessary to secure the agricultural water resources by using or saving the amount of irrigation water efficiently. The objectives of this study were to develop paddy water management scenarios and to evaluate their effectiveness on water saving. Three water management scenarios (a) deep irrigation with ponding depth of 20~80 mm (control, CT), (b) no/intermittent irrigation until paddy cracks (water management A, WM-A), and (c) intermittent irrigation with ponding depth under 20 mm (water management B, WM-B) were developed. Water saving effects were analyzed using monitored data from experimental paddy fields, and agricultural water supply was analyzed on a reservoir-scale using MASA model. The observed irrigation amounts were reduced by 21 % and 17 % for WM-A and WM-B compared to CT, respectively, and mainly occurred by the increase of effective rainfall. The simulation results showed that water management scenarios could reduce irrigation by 21~51 % and total inflow by 10~24 % compared to CT. The long-term simulated water level change of agricultural reservoir resulted in the decrease of dead level occurrence for WM-A and WM-B. The study results showed that WT-A and WT-B have more benefit than CT in the aspect of agricultural reservoir water supply.

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References

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