INFLUENCE OF PREFERENTIAL FLOW DUE TO HETEROGENEOUS PORE DISTRIBUTION ON RAINFALL INFILTRATION AND DRAINAGE CHARACTERISTICS
-
- OHTSU Hiroyasu
- 京都大学大学院 工学研究科
-
- KITAOKA Takafumi
- 京都大学大学院 工学研究科
-
- BABA Takaaki
- 前京都大学大学院工学研究科
-
- YABE Mitsuru
- 応用地質株式会社 流域・砂防事業部
-
- SAKURAI Ken
- 応用地質株式会社 技術本部
Bibliographic Information
- Other Title
-
- 不均質な空隙分布に起因する選択流が降雨浸透特性・排水特性に与える影響
Abstract
<p> In this study, based on the in-situ measurement results on the fill slope where macro-pores were developed, the influence of preferential flow due to heterogeneous pore distribution on rainfall infiltration and drainage characteristics was discussed. As a result, the following possibilities are shown.</p><p> First, in the slope where macro-pores have been developed, when pore-water pressure and volumetric water content increase rapidly due to rainfall, a preferential flow occurs as the permeability of soil containing macro-pores increases by several orders. And since the preferential flow forms a pseudo-saturated region in a short time, the pore-water pressure increased almost coincident with the rainfall peak due to the subsequent high-intensity rainfall. Accordingly, it is considered that since this pore-water pressure transmission occurs in a short time, the occurrence time of the shallow slope failure may be much faster than the result estimated by the conventional seepage flow analysis same as the past slope failure incidents.</p>
Journal
-
- Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering)
-
Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering) 76 (2), 122-141, 2020
Japan Society of Civil Engineers
- Tweet
Details 詳細情報について
-
- CRID
- 1390566775128672896
-
- NII Article ID
- 130007833567
-
- ISSN
- 21856516
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed