巻号一覧
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50 巻, 6 号
選択された号の論文の21件中1～21を表示しています
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吉田 博宣1998 年 50 巻 6 号 p. 1-2
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (2150K) -
内田 太郎, 大手 信人, 水山 高久, 李 昌華1998 年 50 巻 6 号 p. 3-10
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーIn Southern China, many devastated mountains are found where bare soil is exposed because neighboring farmers collect falling leaves and litter for fuel. As a consequence, both the direct runoff percentage and the sediment yield become very large in the devastated mountains. In order to understand the surface erosion process and the mechanism of producing overland flow in one of the devastated mountain in southern China, in-situ sprinkling experiments were curried out, and the following results are found.
1) In the lower area of the mountain slope where surface crust covered by moss can be seen, the ratio of surface runoff to rainfall is high, but sediment yield is small.
2) In the upper part of the mountain slope where there is no crust developed by moss, the ratio of surface runoff to rainfall is low, and sediment yield is large.
These experimental results demonstrate that the crust developed by moss contributes much of the infiltration lowering and to an increase in the surface runoff ratio. The crust also contributes the reduction of sediment yield.抄録全体を表示PDF形式でダウンロード (5801K) -
堀田 紀文, 宮本 邦明, 鈴木 雅一, 太田 猛彦1998 年 50 巻 6 号 p. 11-16
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーPore-water pressure distribution of a solid-water phase flow, that is difficult to measure in an open channel, was measured in a rolling mill. The result confirmed that pore-water pressure was higher than the hydrostatic pressure supposed to exist so far.
Theoretically, the gradient of excess pore-water pressure from hydrostatic pressure, dpf /dy, is proportional to the square of the particle diameter, d, and is known as Reynolds stress. The results of the experiments were consistent with the above theory in characteristics and value for large d, but not for small d. The difference between theory and the results of experiments for small d was caused by infiltration flow which occurred due to the characteristics of the rolling mill. In this case, the dpf /dy was inversely proportional to the square of d based on Darcy's law.抄録全体を表示PDF形式でダウンロード (2418K) -
友松 靖夫, 大野 宏之, 田畑 茂清, 牧田 一男, 山下 勝, 冨田 陽子, 坂場 義雄1998 年 50 巻 6 号 p. 17-24
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーThe Construction Method of IN-situ Stabilized Excavated Materials ‹INSEM› by which excavated sandgravel materials are fully effectively used without wastes is introduced in Sabo works for difficult sites of treatment of the waste materials. The INSEM is a construction material to stabilize in-situ sand-gravels generated by excavation works through mixing with cement. Though the INSEM is similar in material to the CSG or soil cements, the INSEM method is fundamentally unique in its complete treatment of waste soils. The method can be applied to multi-purpose usage for whole structures, foundations, inside cores etc. by reason of its inherence such as simplicity, diversity and economy.
This paper mainly presents the laboratory test results on basic mechanical properties of the INSEM indispensable to using it in the right place for sabo structures. The basic properties include compressive strength, shear strength, deformability and erosion resistance peculiar to Sabo structures. The test results show that the INSEM is an useful material having the sufficient mechanical properties for Sabo structures. Using this material appropriately may be a means to attempt an optimum solution to Sabo structures adaptable to the new era.抄録全体を表示PDF形式でダウンロード (11782K) -
久保田 哲也, 武田 朋子1998 年 50 巻 6 号 p. 25-32
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーThe requirement of fishway of the Sabo facility has been recognized last decades. Since it is considered as the facilities that realize not only fishes conservation but also other environment retaining including dissolved oxygen (DO), desirable types of fishway from the environmental point of view has been studied recently. Therefore, DO distributions in various type of fishway is investigated in this study to evaluate its effects on torrent DO. Consequently, next results were gained.
1) Relations between the DO fluctuation and the hydraulic condition was not clear. 2) The optimum type of fishway could not be distinguished. 3) The extent of DO fluctuation in fishway was almost as same as one in natural torrents.抄録全体を表示PDF形式でダウンロード (8243K) -
石川 芳治1998 年 50 巻 6 号 p. 33-39
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーWooden groundsills are revaluated as structures harmonized with environment, although they have not been constructed in our country recently. First an outline of history is introduced, then strength of wood and antirotten treatment as material for structures are summarized. Characteristics of wooden groundsills and appropriate condition of places and cases for consturction of wooden groundsills are examined.
Furthermore, a method of design on a crib structure type of wooden groundsills is studied. The stability of body and required length and diameter of logs as members of the strutures are examined. The results of examination are shown as nomograms for practical use.抄録全体を表示PDF形式でダウンロード (3247K) -
六甲山住吉川を事例とする研究水山 高久, 冨田 陽子, 井戸 清雄, 藤田 正治1998 年 50 巻 6 号 p. 40-43
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーA computer-aided sabo facilities planning system, CASFPS was developed and applied to the Sumiyosi River in the Rokko Mountains. Some simulations carried out made it clear that empty sabo dams reduce sediment outflow most effectively. However, even the sabo dams filled with sediment were still effective to some extent for controlling sediment outflow, unless the sediment inflow was extremely large. Sabo dams in upstream reaches were effective in checking sediment production from torrent beds. A sediment discharge as large as that caused by the 1938 storm can be controlled with existing sabo dams.抄録全体を表示PDF形式でダウンロード (2278K) -
水山 高久, 冨田 陽子, 野中 理伸, 藤田 正治1998 年 50 巻 6 号 p. 44-47
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーHighly desired data concerning the intensity of sediment transport was obtained during the period from 1996 to 1997 using a hydrophone installed at the Hachisu-dani torrent in Mount Rokko. The analysis of the data clarified that the sediment discharge occured in a very short period of time immediately before the peak flow discharge. Most storms brought little amount of sediment. The largest storm, however, caused some amount of sediment. The resulting analysis suggested that the sediment discharge rate can be estimated using the hydrophone.抄録全体を表示PDF形式でダウンロード (579K) -
小山内 信智, 平松 晋也, 石川 芳治1998 年 50 巻 6 号 p. 48-51
発行日: 1998/03/15
公開日: 2010/04/30
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再度山の緑化への道のり林 和彦1998 年 50 巻 6 号 p. 52-59
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (12573K) -
里深 好文1998 年 50 巻 6 号 p. 60-61
発行日: 1998/03/15
公開日: 2010/04/30
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三好 岩生1998 年 50 巻 6 号 p. 61-64
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (2431K) -
森林水文学の視点から坪山 良夫1998 年 50 巻 6 号 p. 65-67
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (2266K) -
水文地形学の観点から恩田 裕一1998 年 50 巻 6 号 p. 68-69
発行日: 1998/03/15
公開日: 2010/04/30
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檜谷 治1998 年 50 巻 6 号 p. 70-76
発行日: 1998/03/15
公開日: 2010/04/30
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水害から30年市ノ瀬 榮彦1998 年 50 巻 6 号 p. 77-81_2
発行日: 1998/03/15
公開日: 2010/04/30
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水山 高久1998 年 50 巻 6 号 p. 82
発行日: 1998/03/15
公開日: 2010/04/30
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中村 太士1998 年 50 巻 6 号 p. 83
発行日: 1998/03/15
公開日: 2010/04/30
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千葉 達朗1998 年 50 巻 6 号 p. 84
発行日: 1998/03/15
公開日: 2010/04/30
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西田 顕郎1998 年 50 巻 6 号 p. 85
発行日: 1998/03/15
公開日: 2010/04/30
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1998 年 50 巻 6 号 p. 86-88
発行日: 1998/03/15
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (525K)
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