2017年4月
Seasonal change in permeability of surface soils on a slow-moving landslide in a heavy snow region
ENGINEERING GEOLOGY
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- ,
- 巻
- 221
- 号
- 開始ページ
- 1
- 終了ページ
- 9
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.enggeo.2017.02.019
- 出版者・発行元
- ELSEVIER SCIENCE BV
This study demonstrated seasonal changes in the topsoil permeability due to vegetation growth in summer and snow loading in winter of a landslide in a temperate snowy area of northern Japan, which is underlain by soft Neogene sedimentary rocks. The decrease in saturated hydraulic conductivity due to loading was also examined for undisturbed and remolded specimens of surface soils from the landslide, using a newly developed apparatus for the consolidation permeability test. Infiltration capacity measured in the field increased gradually after snow-melt to a peak in midsummer and decreased exponentially with increasing snow load in winter. In the laboratory experiment, saturated hydraulic conductivity declined as an exponential function of loading. The topsoil was permeable enough to infiltrate rainwater into the ground, even for intense rain storms in summer, but became less permeable under heavy snow load during winter and was not capable of full infiltration of meltwater during the snowmelt period. This suggested that Hortonian overland flow should occur in late winter, at least patchily, under the melting snowpack. (C) 2017 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.enggeo.2017.02.019
- ISSN : 0013-7952
- eISSN : 1872-6917
- Web of Science ID : WOS:000400214700001