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タイトル: | 斜面透水層中の浸透流 |
その他のタイトル: | GROUND WATER FLOW DUE TO THE INFILTRATION IN SLOPING SOIL LAYER |
著者: | 福尾, 義昭 |
著者名の別形: | FUKUO, Yoshiaki |
発行日: | 1-Mar-1970 |
出版者: | 京都大学防災研究所 |
誌名: | 京都大学防災研究所年報. A |
巻: | 13 |
号: | A |
開始ページ: | 565 |
終了ページ: | 572 |
抄録: | Ground water flow may be generated in sloping soil layer laid on semi-pervious rock surfacewhen the infiltration of rain water I throughout the soil layer exceeds in the downward leakage ofwater L Out of bed rock surface. The author investigated theoretically the development of sucha flow due to the infiltration under semi-infinite region of rainfall in the ease where the bed rocksurface is fiat with a inclination b≡tan β to horizontal plane and the soil layer has a porosity a, permeability k and an uniform vertical thickness D and found an uniform flow which is coveredby two free surfaces; the one stretching downstream from upper limit of leak surface with a constantinclination cm tanr to horizontal surface and the other growing upwardly at a constant rate(I-L)/ σ in parallel with the bed rock surface. This flow exists within the limit of conditions1 -I>(1-I) (1 -tan2β/2) and I>l, where I≡l/k and l≡L/k may be called the specific infiltrationand leakage, respectively. In the case where 1-I= 1 -tan2β/2, then r =β/2. The frontalline of steady free surface will seep at the position in the distance S= UD sec β/(I-L) (U: horizontalDarcy's velocity of flow) downwardly along sloping soil surface from the fringe of rain-fall regionat the time T= σ D/(I-L) after the wetting front of the infiltration reached the bed rock surface. |
URI: | http://hdl.handle.net/2433/69464 |
関連リンク: | http://www.dpri.kyoto-u.ac.jp/nenpo/nenpo.html |
出現コレクション: | No.13 A |
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