Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Simulation of Soil Hydrological Components in Chuncheon over 30 years Using E-DiGOR Model

  • Aydin, Mehmet (Department of Biological Environment, Kangwon National University) ;
  • Jung, Yeong-Sang (Department of Biological Environment, Kangwon National University) ;
  • Yang, Jae-E. (Department of Biological Environment, Kangwon National University) ;
  • Lee, Hyun-Il (Department of Biological Environment, Kangwon National University) ;
  • Kim, Kyung-Dae (Agricultural Research and Extension Service)
  • Received : 2012.06.12
  • Accepted : 2012.08.06
  • Published : 2012.08.31
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Abstract

The hydrological components of a sandy loam soil of nearly level in Chuncheon over 30 years were computed using the E-DiGOR model. Daily simulations were carried out for each year during the period of 1980 to 2009 using standard climate data. Reference evapotranspiration and potential soil evaporation based on Penman-Montheith model were higher during May to August because of the higher atmospheric evaporative demand. Actual soil evaporation was mainly found to be a function of the amount and timing of rainfall, and presumably soil wetness in addition to atmospheric demand. Drainage was affected by rainfall and increased with a higher amount of precipitation and soil water content. Excess drainage occurred throughout rainy months (from July to September), with a peak in July. Therefore, leaching may be a serious problem in the soils all through these months. The 30-year average annual reference evapotranspiration and potential soil evaporation were 951.5 mm and 714.2 mm, respectively. The actual evaporation from bare soil varied between 396.9-528.4 mm and showed comparatively lesser inter-annual variations than drainage. Annual drainage rates below 120 cm soil depth ranged from 477.8 to 1565.9 mm. The long-term mean annual drainage-loss was approximately two times higher than actual soil evaporation.

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References

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