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Volume 17 (2007)
- Issue 4 Pages 259-
- Issue 3 Pages 180-
- Issue 2 Pages 106-
- Issue 1 Pages 5-
Volume 17, Issue 1
Displaying 1-5 of 5 articles from this issue
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Shigeru TANI, Shinji FUKUSHIMA2007 Volume 17 Issue 1 Pages 5-26
Published: March 15, 2007
Released on J-STAGE: June 27, 2008
JOURNAL FREE ACCESSWe were investigated the case histories in the rehabilitation of the existing embankment dams for improved the safety or prevented the leakage of embankment, and raising the existing embankment dams for increased the storage. This paper presents a general considerations of the factors to be considered in designing and constructing for the rehabilitation of the existing embankment dams. The zoning of the embankment in rehabilitation of old filldam is depend on the stability and permeability of the existing dam embankment, the strength and permeability characteristics of embankment soil, the capacity and seepage characteristics of bedrock foundation, the conditions in the configuration of the location of the dam, and so on.View full abstractDownload PDF (1210K) -
Mizuho IMAMURA, Toru HINO, Yasuyuki HOUCHI2007 Volume 17 Issue 1 Pages 27-38
Published: March 15, 2007
Released on J-STAGE: June 27, 2008
JOURNAL FREE ACCESSAmong the operations of the dam reservoir, there is general recognition that the constant water level operation is easy. However, there are some problems which should be solved from the viewpoint of actual condition in this operation. In this paper, it is pointed out the problems by analyzing the constant water level operation from a viewpoint of the hydraulics, and the corrective strategy for these problems is proposed. Concretely, it is shown that the constant water level operation is to be explained by the same form of the equation of attenuation vibration as the differential equation system, and the reliable system for the constant water level operation is proposed among these attenuation vibration equations. And also the evaluation to this proposed system for the constant water level operation is to be done from several viewpoints.View full abstractDownload PDF (561K) -
Yukihide TASHIRO, Makoto OOUCHI, Jiro MORI2007 Volume 17 Issue 1 Pages 39-53
Published: March 15, 2007
Released on J-STAGE: June 27, 2008
JOURNAL FREE ACCESSAsphalt facing type dams and reservoirs are required to secure the imperviousness of joint sections between asphalt facing and concrete structures such as dam cut-off, intake, spillway, etc., through accurate agglutination. It is reported that in cases where external force applied to the interface of asphalt and concrete are causing stripping or sliding, the strains around the interface enlarges and cracks appear in the asphalt facing. This report proposes the optimum design and construction method of the joint sections by proving the joint structure of asphalt facing and concrete based on the results of material experiments and construction site pavement experiments conducted at upper reservoir construction of Omarugawa pumped storage power station.View full abstractDownload PDF (872K)
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Toshihisa FUKAYA, Yukihisa OKAMOTO, Keiji JHO, Keizo TAKEO2007 Volume 17 Issue 1 Pages 54-64
Published: March 15, 2007
Released on J-STAGE: June 27, 2008
JOURNAL FREE ACCESSYahagi dam had two problems in the past, namely one was the prolongation of turbidity due to discharge water, and the other is a discharge of cold water during sweetfish's going against the stream. In order to solve these problems, installation of anti-turbidity fences was planned, and the management of selected-water intake facilities was reviewed. In this planning, a part of the fences was changed to movable type fences in order to lead clean water to dam surface after a flood, because it was expected that ordinal fence did not get good improvement. The background and reasons of the introduction of the movable type fences are mentioned and the facilities are introduced in this report.View full abstractDownload PDF (2963K) -
Mitsutoshi YAMAMOTO, Nobuyuki TAMAI2007 Volume 17 Issue 1 Pages 65-75
Published: March 15, 2007
Released on J-STAGE: June 27, 2008
JOURNAL FREE ACCESSIn this paper the whole history of conflicts of Tatsumi Dam project is reviewed through three phases. During the phases of escalation and stalemate of the conflict, neither negotiations were open to the public nor all stakeholders were represented, and clarity of technical issues was low. It is concluded that the introduction of the concept "local history and tradition" and an innovative integrated basin plan inclusive of two existing reservoirs are essential to settle down the conflict. It is clarified empirically based on articles of newspapers, minutes of prefectural assembly, and existing research outputs that 1) logics based on philosophical understanding of the project, 2) technical clarity, and 3) stakeholders' approach are necessary factors in successful conflict management.View full abstractDownload PDF (1434K)
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