THE JOURNAL OF THE JAPANESE ASSOCIATION OF GROUNDWATER HYDROLOGY
Online ISSN : 2186-5515
Print ISSN : 0029-0602
ISSN-L : 0029-0602
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Volume 23, Issue 3
Displaying 1-3 of 3 articles from this issue
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  • Hydraulic Analysis of Ground Water with Rainfall Infiltration around Cut-Off Wall
    Kuniaki SATO
    1981 Volume 23 Issue 3 Pages 65-78
    Published: November 30, 1981
    Released on J-STAGE: December 11, 2012
    DOIhttps://doi.org/10.5917/jagh1959.23.65
    JOURNAL FREE ACCESS
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    This paper presents a hydraulic analysis of unconfined ground water with the rainfall infiltration around the cut-off wall, based on Dupiut's assumption as used in hydraulics. Flow analysis is concerned with change of water depth, change of flow rate and storage volume originated in construction of cut-off wall on the declined impermeable bed. It is clearly found that different flow characters are formed by existing the rainfall infiltration compared with those of flow ignored the infiltration. Available informations are proposed by detail examinations of theoretical results and computation examples for steady flow of unconfined aquifer having the cut-off wall.
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  • On the Annual Runoff Ratio of the Sozu Spring in the North-western Area of Mt. Waita, Kumamoto Prefecture.
    Tsugio OZAKI
    1981 Volume 23 Issue 3 Pages 79-90
    Published: November 30, 1981
    Released on J-STAGE: December 11, 2012
    DOIhttps://doi.org/10.5917/jagh1959.23.79
    JOURNAL FREE ACCESS
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    For the purpose of studying the quantity of groundwater in mountainous area, the author considered the relation betwcen precipitation and discharge of the Sozu spring which is located on the volcanic region in the northern part of Kumamoto prefecture. The Sozu spring is one of the springs found at the foot of Mt. Waita, composed of Quaternary volcanic rocks.
    The author measured total amount of discharge of above-mentioned five springs, streams, and estimated that the catchment area is 4.10 km2 from topography. Also, the author compared five hydrologic years' precipitation data, from January 1975 to March 1980, of the area studied with records of discharge of the Sozu spring. So, the author found the estimated catchment area of the Sozu spring is 1.90 km2 in average, based on three times' measurements of discharge and their results of ranging from 1.85 km2to 1.96 km2.
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  • [title in Japanese]
    [in Japanese]
    1981 Volume 23 Issue 3 Pages 91-94
    Published: November 30, 1981
    Released on J-STAGE: December 11, 2012
    DOIhttps://doi.org/10.5917/jagh1959.23.91
    JOURNAL FREE ACCESS
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