한국농공학회논문집 (Journal of The Korean Society of Agricultural Engineers)

  • 제60권4호
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  • Pages.63-72
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  • 2018
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  • 1738-3692(pISSN)
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  • 2093-7709(eISSN)
한국농공학회 (The Korean Society of Agricultural Engineers)
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RCP 시나리오 기반 비관개기 강수량을 고려한 농업용 저수지의 용수공급 확률 분석

Analysis of Water Supply Probability for Agricultural Reservoirs Considering Non-irrigation Period Precipitation using RCP Scenarios

  • Bang, Jehong (Department of Rural Systems Engineering, Seoul National University) ;
  • Choi, Jin-Yong (Department of Landscape Architecture and Rural System Engineering, Seoul National University) ;
  • Lee, Sang-Hyun (Research Institute for Humanity and Nature)
  • 투고 : 2017.12.27
  • 심사 : 2018.06.14
  • 발행 : 2018.07.31
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초록

The main function of an agricultural reservoir is to supply irrigation water to paddy rice fields in South Korea. Therefore, the operation of a reservoir is significantly affected by the phenology of paddy rice. For example, the early stage of irrigation season, a lot of irrigation water is required for transplanting rice. Therefore, water storage in the reservoir before irrigation season can be a key factor for sustainable irrigation, and it becomes more important under climate change situation. In this study, we analyzed the climate change impacts on reservoir storage rate at the beginning of irrigation period and simulated the reservoir storage, runoff, and irrigation water requirement under RCP scenarios. Frequency analysis was conducted with simulation results to analyze water supply probabilities of reservoirs. Water supply probability was lower in RCP 8.5 scenario than in RCP 4.5 scenario because of low precipitation in the non-irrigation period. Study reservoirs are classified into 5 groups by water supply probability. Reservoirs in group 5 showed more than 85 percentage probabilities to be filled up from half-filled condition during the non-irrigation period, whereas group 1 showed less than 5 percentages. In conclusion, reservoir capacity to catchment area ratio mainly affected water supply probability. If the ratio was high, reservoirs tended to have a low possibility to supply enough irrigation water amount.

키워드

참고문헌

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