巻号一覧
前身誌
54 巻, 2 号
選択された号の論文の18件中1～18を表示しています
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竹内 美次2001 年 54 巻 2 号 p. 1-3
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (2792K) -
冨田 陽子, 竹崎 伸司, 巖倉 啓子, 植野 利康, 佐野 滝雄, 中田 慎2001 年 54 巻 2 号 p. 5-12
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーIn recent years, environmental conservation has become an important aspect of the execution of public works projects. Phenomena unconnected with sediment production and discharge must be clarified and accounted for at the execution stage of sabo works project.
A questionnaire survey of the State of Environmental Surveys conducted at the 12 th Sabo Conference revealed that project superintendents lack clear guidelines for future environmental surveys. Therefor, results of environmental surveys conducted at each project site not necessarily function effectively at the execution stage later project.
We have, therefor, conducted further study of the results of the questionnaire survey to define the reasons why environmental survey results are not used effectively at the execution stage of the later project.
We offer the following three improvement propositions.
1) Perform surveys including the habitats and interrelationships of living organisms.
2) Perform monitoring to study the effects of the works on the environment and feed the results back to maintenance work and new work.
3) Manage survey results as map information (habitat maps etc.)抄録全体を表示PDF形式でダウンロード (8994K) -
航空写真を用いた崩壊発生後25年間の変化の検討鈴木 雅一2001 年 54 巻 2 号 p. 13-18
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーIn August 1969, heavy rainfall caused a large landslide with a sediment volume of 5-6 million cubic meters in the Roukazawa Watershed, a tributary of the upper Kurobe River. The Roukazawa Landslide was monitored from 1969 to 1994 using aerial photographs to observe topographical and vegetation changes. Gradual expansion of the landslide area was detected over the 25 years; relatively rapid expansion occurred in the first eight years. Vegetation did not invade the landslide area until recently. Yield sediment flowed downstream as debris flow, and the height of the streambed increased by 32m with deposition of some of the yield sediment at the junction of the Roukazawa with the main channel of the Kurobe River, and the width of stream increased considerably. Changes in the area of deposition were also evident from the series of aerial photographs. Twenty-five years after the slide, several types of vegetation had become established, and the stream channel had returned to nearly the same width as before the debris flow.抄録全体を表示PDF形式でダウンロード (11273K) -
金 永模, 水山 高久2001 年 54 巻 2 号 p. 19-27
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーThere are many Sabo dams in Rokko Mountains. In this report, we tried to make clear of the relation between Sabo dams and freshwater fishes of Cyprindae.
The results are as follows
1) The streams in Rokko Mountains are cut off and closed by many Sabo dams. But freshwater fishes of Cyprindae are found to be out of influences of Sabo dams.
2) Kawamutsu (Zacco temmincki) is a most popular species in Rokko Mountains. It is cleared that Kawamutsu ofen crowds together in surface of sedimentation of Sabo dams.
3) Even if freshwater fishes have disappered by debris exclude works of Sabo dam, they crowd together in a surface of sedimention of Sabo dam again within several years.
4) There are some pools that don't break by Debris folw. We suggest that firm pools must be protected by artificial methods.抄録全体を表示PDF形式でダウンロード (6911K) -
矢野 勝太郎2001 年 54 巻 2 号 p. 28-31
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーThis report aims to survey the outline of debris flows occured in the last 24 years in Japan.
Elements which is examined are catchment area of stream which occured debris flow, flooding area of each debris flow, depth and volume of the deposit, etc.
The data is taken from my materials on hand from 1976 to 1981, and from Sabo handbook (Heisei 11 edition) from 1986 to 1999.抄録全体を表示PDF形式でダウンロード (3554K) -
加藤 誠章, 執印 康裕2001 年 54 巻 2 号 p. 32-37
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーIn order to evaluate the effects of soil water suction on soil reinforcement by root systems, the authors conducted direct shear tests under suction control (from 0 to 380cmH2O). Samples of forest soil from the Fukuroyama-sawa watershed in The Tokyo University Forest, in Chiba, were compared with previously reported values for Toyora standard sand. Bamboo sticks (0.27cm in diameter, 10cm long) were inserted in the shear box as simulated root systems.
In the forest soil, the internal friction angle and the apparent cohesion were proportional to the soil water suction. In Toyora standard sand, on the other hand, the internal friction angle was constant and the apparent cohesion had a maximum value at the critical capillary head. Both the apparent cohesion and the internal friction angle increased when roots were inserted. The reinforcement of the apparent cohesion was proportional to the soil water suction, and the reinforcement of the internal friction angle was constant when the soil was saturated.抄録全体を表示PDF形式でダウンロード (6078K) -
執印 康裕, 鈴木 雅一, 太田 猛彦2001 年 54 巻 2 号 p. 38-46
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーThis paper presents a classification of the potential for soil erosion and mass movement on a global scale free from social factors. We used global data sets open to the public via the Internet to classify soil erosion and mass movement. The Earth's landmass was divided into three types of erosion: ice, wind, and water erosion. Using the global distribution of a warmth index calculated from the mean monthly temperature, areas with a warmth index less than 15 were defined as having a high potential for ice erosion. Calculating a radiative dryness index from monthly precipitation and net radiation data, areas with a radiative dryness index greater than 3.5 were classified as regions with a high potential for wind erosion. The remaining area was defined as the region with a high potential for sediment discharge by water; this area was also defined using a relief index calculated from digital elevation and maximum monthly precipitation data. Using this classification, this paper shows the distribution of the potential for soil erosion and mass movement on a global scale.抄録全体を表示PDF形式でダウンロード (8563K) -
金 永模2001 年 54 巻 2 号 p. 47-53
発行日: 2001/07/15
公開日: 2010/04/30
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牛山 素行2001 年 54 巻 2 号 p. 54-59
発行日: 2001/07/15
公開日: 2010/04/30
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門間 敬一, 井村 俊則2001 年 54 巻 2 号 p. 60-63
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーThe ring-net-works have been spread as a rock-fall barrier in Japan. We investigated accordingly the usages such as “Plan” “Design” “Work” “Management” of ring-nets. We state on this time the some usages currently as “The Actual Condition” using the results by compiling statistics of data. And we state some comments about some usages “The established exceed load for the ring-net” and so on.抄録全体を表示PDF形式でダウンロード (6366K) -
野口 明義2001 年 54 巻 2 号 p. 64-68
発行日: 2001/07/15
公開日: 2010/04/30
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国枝 重一, 飯野 光則, 池田 正樹, 山辺 康晴, 中島 達也, 小川 紀一朗2001 年 54 巻 2 号 p. 69-74_2
発行日: 2001/07/15
公開日: 2010/04/30
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澤井 健二2001 年 54 巻 2 号 p. 75-84
発行日: 2001/07/15
公開日: 2010/04/30
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牛山 素行2001 年 54 巻 2 号 p. 85-86
発行日: 2001/07/15
公開日: 2010/04/30
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池谷 浩, 松村 和樹, 廣瀬 隆浩2001 年 54 巻 2 号 p. 89-92
発行日: 2001/07/15
公開日: 2010/04/30
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木下 篤彦2001 年 54 巻 2 号 p. 93-94
発行日: 2001/07/15
公開日: 2010/04/30
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小花和 宏之2001 年 54 巻 2 号 p. 95
発行日: 2001/07/15
公開日: 2010/04/30
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大会実行委員会2001 年 54 巻 2 号 p. 101-106
発行日: 2001/07/15
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (913K)
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