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Estimating Paddy Rice Evapotranspiration of 10-Year Return Period Drought Using Frequency Analysis

빈도 분석법을 이용한 논벼의 한발 기준 10년 빈도 작물 증발산량 산정

  • 유승환 (서울대학교 조경.지역시스템공학부 대학원) ;
  • 최진용 (서울대학교 조경.지역시스템공학부) ;
  • 장민원 (서울대학교 농업생명과학연구원)
  • Published : 2007.05.31

Abstract

Estimation of crop consumptive use is a key term of agricultural water resource systems design and operation. The 10-year return period drought has special aspects as a reference period in design process of irrigation systems in terms of agricultural water demand analysis so that crop evapotranspiration (ETc) about the return period also has to be analyzed to assist understanding of crop water requirement of paddy rice. In this study, The ETc of 10-year return period drought was computed using frequency analysis by 54 meteorological stations. To find an optimal probability distribution, 8 types of probability distribution function were tested by three the goodness of fit tests including ${\chi}^2$(Chi-Square), K-S (Kolmogorov-Smirnov) and PPCC (Probability Plot Correlation Coefficient). Optimal probability distribution function was selected the 2-parameter Log-Normal (LN2) distribution function among 8 distribution functions. Using the two selected distribution functions, the ETc of 10-year return period drought was estimated for 54 meteorological stations and compared with prior study results suggested by other researchers.

Keywords

References

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