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Classification of Hydrologic Soil Groups of Soil Originated from Limestone by Assessing the Rates of Infiltration and Percolation  

Hur, Seung-Oh (Soil Management Division, National Institute of Agricultural Science & Technology, RDA)
Jung, Kang-Ho (Soil Management Division, National Institute of Agricultural Science & Technology, RDA)
Sonn, Yeon-Kyu (Soil Management Division, National Institute of Agricultural Science & Technology, RDA)
Ha, Sang-Keun (Soil Management Division, National Institute of Agricultural Science & Technology, RDA)
Kim, Jeong-Gyu (Division of Environmental Science and Ecological Engineering, Korea University)
Kim, Nam-Won (Water Resources Research Department, Korea Institute of Construction Technology)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.42, no.2, 2009 , pp. 103-109 More about this Journal
Abstract
Soils originated from limestone, located at the southern part of Kangwon province and Jecheon, Danyang of Chungbuk province are mainly composed of fine texture, and have different properties from soils originated from granite and granite gneiss, especially for water movement. This study was conducted for classification of hydrologic soil group (HSG) of soils originated from limestone by measuring the infiltration rate of surface soils and percolation rate of sub soils. Soils used for the experiment were 6 soils in total : Gwarim, Mosan, Jangseong, Maji, Anmi and Pyongan series. Infiltration and percolation rate were measured by a disc tension infiltrometer and a Guelph permeameter, respectively. Particle size distribution and organic matter content of the soils were analyzed. HSG, which was made by USDA NRCS(National Resources Conservation Service) for hydrology, of Gwarim series with O horizon of accumulated organic matter was classified as type A which show the properties of low runoff potential, rapid infiltration and percolation rate. HSG of Mosan series, which has high gravel content and very rapid permeability, was classified as type B/D because of the impermaeble base rock layer under 50cm from surface. HSG of Jangseong series with shallow soil depth was classified as type C/D owing to the impermaeble base rock layer under 50cm from surface. HSG of Maji series was type B, and HSG of Anmi series used as paddy land was type D because of slow infiltration and percolation rate caused by the disturbance of surface soil by puddling. HSG of Pyeongan series having a sudden change of layer in soil texture was type D because of the slow percolation rate caused a the layer.
Keywords
Hydrologig Soil Group; Infiltration; Lime Stone; Percolation Rate;
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