Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Classification of Hydrologic Soil Groups of Korean Soils Using Estimated Saturated Hydraulic Conductivity and Depth of Impermeable Layer

포화 수리전도도와 불투수층 깊이에 따른 우리나라 토양의 수문학적 토양군 분류

  • Han, Kyunghwa (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Jung, Kangho (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Cho, Heerae (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Lee, Hyubsung (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Ok, Junghun (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Seo, Mijin (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Zhang, Yongseon (National Institute of Agricultural Sciences, Rural Development Administration) ;
  • Seo, Youngho (Gangwon Agricultural Research & Extension Services)
  • Received : 2017.07.06
  • Accepted : 2017.08.16
  • Published : 2017.09.30
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Abstract

Hydrologic soil group is one of the important factors to determine runoff potential and curve number. This study was conducted to classify the hydrologic soil groups of Korean soils by considering saturated hydraulic conductivity and depth of impermeable layer. Saturated hydraulic conductivity of Korean soils was estimated by pedotransfer functions developed in the previous studies. Most of paddy soils were classified as D type due to shallow impermeable layer and low saturated hydraulic conductivity in B soil horizon. For upland and forest, soils classified to A and D types increased compared with former classification method because underestimated permeabilities and overestimated drainages were corrected and rock horizon in shallow depth was regarded as impermeable layer. Soils in mountainous land showed the highest distribution in A type, followed by D type. More than 60 % of soils in mountain foot-slope, fan and valley, alluvial plains, and fluvio-marine deposits were classified to D type because of land use such as paddy and upland.

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References

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