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Volume 41 (1988 - 198･･･
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Volume 41, Issue 1
Displaying 1-18 of 18 articles from this issue
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[in Japanese]1988 Volume 41 Issue 1 Pages 1
Published: 1988
Released on J-STAGE: September 08, 2016
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[in Japanese]1988 Volume 41 Issue 1 Pages 2
Published: 1988
Released on J-STAGE: September 08, 2016
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[in Japanese]1988 Volume 41 Issue 1 Pages 3
Published: 1988
Released on J-STAGE: September 08, 2016
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1988 Volume 41 Issue 1 Pages 4-7
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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[in Japanese]1988 Volume 41 Issue 1 Pages 8
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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1988 Volume 41 Issue 1 Pages 9-29
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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[in Japanese]1988 Volume 41 Issue 1 Pages 41-42
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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Kunihiko NISHIO, Hiroshi KAWABE, Hirofumi SHIBANO, Isao YAMAGUCHI1988 Volume 41 Issue 1 Pages 43-47
Published: 1988
Released on J-STAGE: September 08, 2016
JOURNAL FREE ACCESSSedimentation which is effected by check dams enhances flood-control and enriches water resources. The authors investigated the influent and effluent phenomena of a large amount of sediment by meas uring the electrical conductivity and discharge of water in the headwaters of the Kurokura River in the Tanzawa Mountains, and proposed a method to estimate the amount of groundwater in the sediment. The sediment in Ogarasawa Creek was presumed to prevent the discharge of 12mm of a precipitation of 67mm, and the amount of groundwater in the sediment was estimated to be equivalent to 11mm of water depth.View full abstractDownload PDF (704K) -
Takashi OKIMURA, Masakatsu NAKAGAWA1988 Volume 41 Issue 1 Pages 48-56
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
JOURNAL FREE ACCESSSites of mountain slope failure appearing during heavy rainfalls are discussed from a viewpoint of topographical features such as a catchment area and a slope gradient. With a digital landform model which is composed of ground surface elevation data at every grid point, a catchment area with a width (5m) is obtained by a mount climb method and a slope inclination is defined at right angles to the width as a gradient with a horizontal distance of 10 or 10√2m. An index of a geomorphic driving force defined by the catchment area and the slope inclination (Hatano, 1974) is calculated at each grid point excepting some points on streams where a potential failure layer is eroded by actions of stream water.
The indexes are arranged from the maximum to the minimum and are classified into 10 classes. Each class will have almost the same number of grid points. The classes are designated in order of danger as A, B, …, J, with A being the most dangerous. The method is examined at two different test fields. The results show that old failed sites appear in A-C or A-D class, respectively. That is to say that, only by using a digital landform model, we can point out 30 or 40% of an area as a potential failure site. Field investigations for a depth of a potential failure layer should be made and soil characteristics should be examined at the obtained potential failure sites.View full abstractDownload PDF (1447K) -
Takeshi SHIDA, Shinya SAITO1988 Volume 41 Issue 1 Pages 57-64
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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1988 Volume 41 Issue 1 Pages 64
Published: 1988
Released on J-STAGE: August 06, 2010
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Hiroyuki YOSHIMATSU, Takahisa MIZUYAMA, Hiroto MITSUI, Akihisa FUKUMOT ...1988 Volume 41 Issue 1 Pages 65-71
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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Takahisa MIZUYAMA, Hiroshi OKADA, Kazuki MATSUMURA1988 Volume 41 Issue 1 Pages 72-75
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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Tomomitsu YASUE, Masaru OKADA1988 Volume 41 Issue 1 Pages 76-78
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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[in Japanese], [in Japanese]1988 Volume 41 Issue 1 Pages 79-83_2
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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[in Japanese], [in Japanese]1988 Volume 41 Issue 1 Pages 84-91
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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[in Japanese]1988 Volume 41 Issue 1 Pages 92-93
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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[in Japanese]1988 Volume 41 Issue 1 Pages 93
Published: June 25, 1988
Released on J-STAGE: August 06, 2010
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