Journal of the Japan Society of Erosion Control Engineering

Online ISSN : 2187-4654
Print ISSN : 0286-8385
ISSN-L : 0286-8385

Browse

Search
Browse

All issues

Predecessor

Volume 42, Issue 4

Displaying 1-14 of 14 articles from this issue

Download citation

Show all abstracts

[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 1-2
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_1

JOURNAL FREE ACCESS

Download PDF (310K)
Study on Chemical Weathering Index for Rocks

Takaaki AMADA, Naoki OKATANI

1989 Volume 42 Issue 4 Pages 3-11
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_3

JOURNAL FREE ACCESS

Show abstractHide abstract

The chemical weathering indices, being one of the measures for the degree of weathering, have been proposed by many researchers since WPI (Weathering Potential Index) by Reiche (1943) . In case of using these indices, it is necessary not only to systematically classify and arrange them but also to understand the property of each index.
In this paper, the comparison among each index was attempted by applying their indices to the same weathering profile, using the papers which indicate the chemical composition of rocks. The rock type are granitic rock, andesite, shale, and mudstone.
And some weathering indices, being both more accurate and easy to use, such as ss2, A. D. F., ba1, ba2, ff etc., were selected.
Furthermore, the authors propose a new chemical weathering index: SIW (Simple Index of Weathering) =Na₂O/Al₂O₃+Ig. loss (molecular proportion) and prove its effectiveness.

View full abstract

Download PDF (1145K)
Computer Simulation on Lava Flow and Ideas of Countermeasures

Takahisa MIZUYAMA, Junichi KURIHARA, Kazuo KAWAMURA, Ippei KITAHARA

1989 Volume 42 Issue 4 Pages 12-17
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_12

JOURNAL FREE ACCESS

Download PDF (8852K)
Resistance and Sedimentation by Trees

Takahisa MIZUYAMA, Takaaki AMADA, Junichi KURIHARA, Mikio KOBAYASHI

1989 Volume 42 Issue 4 Pages 18-22
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_18

JOURNAL FREE ACCESS

Show abstractHide abstract

Many sabo facilities utilizing trees in streams or sorting basins are often planned to promote sedimentation. It is expected that trees in stream have a function of sedimentation because trees can be hydraulically regarded as a group of roughness. then the velocity is decreased. Flow resistance and sedimentation by trees were investigated in flume experiments.
Results showed that the coefficient of roughness increases as the percentage of area occupied by trees becomes larger, then the drag coefficient decreases conversely in terms of interference of wakes between trees. Sedimentation is remarkable when the percentage of area occupied by trees is large, and the ratio of the interval between trees to maximum diameter is small. But the volume of sedimentation decreases when the percentage of area occupied by trees is more than 2. 5×10^-2 and the ratio of the interval between trees is less than 1.5.

View full abstract

Download PDF (630K)
Debris Flow and Frozen Soil Layer at the Osawa Collapse in Mt. Fuji

Jyoji NANZAKA, Yukio IWATA

1989 Volume 42 Issue 4 Pages 23-27
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_23

JOURNAL FREE ACCESS

Download PDF (645K)
Discharge Coefficient and Depositional Shape of Slit-type Sabo Dam

Takahisa MIZUYAMA, Sohei ABE, Shigemi YAJIMA

1989 Volume 42 Issue 4 Pages 28-30
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_28

JOURNAL FREE ACCESS

Download PDF (303K)
[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 31-38_2
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_31

JOURNAL FREE ACCESS

Download PDF (18684K)
[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 39-48
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_39

JOURNAL FREE ACCESS

Download PDF (9171K)
[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 49-50
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_49

JOURNAL FREE ACCESS

Download PDF (325K)
[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 50-52
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_50

JOURNAL FREE ACCESS

Download PDF (490K)
[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 52-54
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_52

JOURNAL FREE ACCESS

Download PDF (483K)
[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 55-57
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_55

JOURNAL FREE ACCESS

Download PDF (3878K)
[title in Japanese]

[in Japanese]

1989 Volume 42 Issue 4 Pages 57-59
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_57

JOURNAL FREE ACCESS

Download PDF (4384K)
[title in Japanese]

1989 Volume 42 Issue 4 Pages 61-62
Published: November 25, 1989
Released on J-STAGE: April 30, 2010

DOIhttps://doi.org/10.11475/sabo1973.42.4_61

JOURNAL FREE ACCESS

Download PDF (230K)

feedback

Top

Register with J-STAGE for free!