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No.49 (2002/12) >

 
Title :土壌クラストの透水性
Title alternative :Permeability of Soil Crust
Authors :宜保, 清一
宮良, 志乃
中村, 真也
Authors alternative :Gibo, Seiichi
Miyara, Shino
Nakamura, Shinya
Issue Date :1-Dec-2002
Abstract :The clarify the permeability of a soil crust, the constant head permeability tests were carried out on the kaolinite and the red soil, and the hydraulic gradient i where Darcy's law was valid and the saturated hydraulic conductivity of crusts mainly examined. For the kaolinite crust, the flux q gradually increased with the hydraulic gradient i, and reached its peak at different hydraulic gradients ranging from 80 to 100 and ended as a down-ward curve. For consolidated crusts at 70 hydraulic gradient of valid region of Darcy's a law, the q-i relationobtained by being tested at the hydraulic gradients below 70 was expressed as a straight line which had the saturated hydraulic conductivity of k=6.80 × 10^<-5>cm/s. For the red soil crust, all experimental data points of q and i were approximately on a straight line at the hydraulic gradients below 30, and thus k=2.50 × 10^<-4>cm/s was given.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/3627
Citation :琉球大学農学部学術報告 = The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus no.49 p.159 -163
Appears in Collections:No.49 (2002/12)

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