Korean Journal of Agricultural Science (농업과학연구)

Institute of Agricultural Science, CNU (충남대학교 농업과학연구소)
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Verification on PTF (Pedo-Transfer Function) estimating soil water retention based on soil properties

토양특성 기반 토양수분 함량 예측을 위한 PTF 적용성 검정

  • Hur, Seung-Oh (National Academy of Agricultural Science, RDA) ;
  • Sonn, Yeon-Gyu (National Academy of Agricultural Science, RDA) ;
  • Hyun, Byung-Kewn (National Academy of Agricultural Science, RDA) ;
  • Shin, Kook-Sik (National Academy of Agricultural Science, RDA) ;
  • Oh, Taek-Keun (Department of Bio-Environmental Chemistry, Chungnam National University) ;
  • Kim, Jeong-Gyu (Division of Environmental Science & Ecological Engineering, Korea University)
  • 허승오 (국립농업과학원 토양비료과) ;
  • 손연규 (국립농업과학원 토양비료과) ;
  • 현병근 (국립농업과학원 토양비료과) ;
  • 신국식 (국립농업과학원 토양비료과) ;
  • 오택근 (충남대학교립 생명환경화학과) ;
  • 김정규 (고려대학교 환경생태공학과)
  • Received : 2014.10.28
  • Accepted : 2014.11.11
  • Published : 2014.12.31
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Abstract

Identifying soil water content as a major factor for evaluating irrigation and water resource is a primary module to develop a prediction model. A variety of PTFs (Pedo-Transfer Functions) are applied in the models to estimate soil water content, the analysis techniques, however, which compare the estimated from models and the measured by instruments, are not reached at the level to demonstrate the effectiveness of the PTFs in Korea. Many soil physicians such as Eom, Peterson, Rawls, Saxton, Bruand, Baties, Tomasella & Hodnett (T&H), and Minasny, have developed analytic models using PTFs. Soil data for the analysis used soil water contents on 347 soil series (10 kPa), 358 soil series (33 kPa), 356 soil series (1,500 kPa) established by NAAS (National Academy of Agricultural Science). A coefficient of determination on soil water content at 10, 33 and 1,500 kPa was the highest as 0.5932 in EM (Eom model), 0.6744 in REM (Rawls model) and 0.6108 in REM, respectively. In conclusion, it is strongly suggested that the use of EM or REM is suitable for estimating soil water content in Korea although SM (Saxton model) has been widely used.

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References

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