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자료유형
학술저널
저자정보
저널정보
한국농공학회 한국농공학회논문집 한국농공학회논문집 제61권 제6호
발행연도
2019.1
수록면
93 - 101 (9page)

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This study aims to analyze the influences of applications of two different evapotranspiration (ET) estimation methods on the irrigation waterrequirements (IWR) for paddy rice and water supply reliability of agricultural reservoirs. The modified Penman (MP), traditional method, and thePenman-Monteith (PM), the new adopted method, were applied on 149 reservoirs located in Honam province for this study. The weather date was usedfrom 1987 to 2016, and analysed the trends of temperature and rainfall during rice growing season between past and current 10 years respectively. The increased average temperature and rainfall were observed from the current 10 years compared to the past years. This phenomena impacts on theresults of ET and IWR estimations with decreased IWR obtained from high rainfall regions and increased ET obtained high temperature regions. Forthe comparisons of application results of two ET approaches, the PM method showed lower ET and IWR, and hence more reliable storage capacityof the reservoirs respect to water supply to paddy fields. The results also showed that the influences of different ET methods applications on the watersupply reliability of reservoirs are negligible for the cases of over 3.7 watershed ratio and 670 mm unit reservoir storage, while significant variationsof the results obtain from the applications between two ET approaches for the opposite cases. Further studies are necessary to consider various fieldconditions for practical applications of the PM method estimating ET in the fields of paddy farming.

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