スイスおよび日本の排砂バイパストンネルの摩耗損傷の水理学的分析および対策提案

• Project/Area Number: 14F04776
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 外国
• Research Field: Hydraulic engineering
• Research Institution: Kyoto University
• Principal Investigator: 角 哲也 京都大学, 防災研究所, 教授 (40311732)
• Co-Investigator(Kenkyū-buntansha): AUEL CHRISTIAN 京都大学, 防災研究所, 外国人特別研究員 ; AUEL Christian 京都大学, 防災研究所, 外国人特別研究員
• Project Period (FY): 2014-04-25 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,300,000 (Direct Cost: ¥2,300,000); Fiscal Year 2016: ¥600,000 (Direct Cost: ¥600,000); Fiscal Year 2015: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2014: ¥700,000 (Direct Cost: ¥700,000)
• Keywords: Hydropower / Reservoir sedimentation / Sediment bypass tunnel / Turbulence / Particle motion / Invert abrasion / Abrasion model / Reservoir sustainability

Outline of Annual Research Achievements

世界で排砂バイパストンネル技術をリードする国はスイスと日本である．本研究では，日本の代表事例である新宮川旭ダムを対象に，流下した大量の砂礫によるトンネル底面内の摩耗損傷の状況および運用実績データを用いて，以下の課題に取り組んだ．
１）摩耗予測式の精度向上：砂礫の衝突による摩耗損傷メカニズムの解明には、トンネル内高速流の流れ構造を明らかにすることが重要である．ここでポイントとなるのは，トンネルの縦断・平面線形，設計流速，流入する砂礫の粒度分布（平均粒径，最大粒径），岩質（石英の含有率など），土砂流下量，年間平均運用回数・日数などである．そこで、スイスでのAuel研究員の成果と旭ダムの運用データを組み合わせて、摩耗損傷の予測式の精度向上を行った．
２）トンネルによる貯水池の長寿命化の定量的評価：日本の歴史的なバイパストンネルである神戸の布引五本松ダムや旭ダムの事例をもとに，バイパストンネルがいかにダム貯水池の長寿命化に貢献したかを示すためのダイヤグラムを提示した．また，トンネルから下流河道に供給される土砂が下流河道にどのような環境的な変化をもたらすのかを，スイスおよび日本の建設年代の異なる排砂バイパストンネルを有する複数のダムを対象に検討した結果，排砂バイパスによる土砂供給が明確に下流河道の河床材料および生物群集を変化させること，また，運用開始からの年数が経るとともにその影響が大きくなること，一方で，運用からかなり早期にその効果が発揮されることが明らかとなった．
３）トンネル床面の摩耗損傷による運用管理面での許容範囲レベルの確認：トンネル床面の摩耗損傷が，運用管理面でどこまで許容されるかを，トンネル内部の水理構造から明らかにするために，京都大学桂キャンパスにおける水理実験施設を用いて基礎的な水理実験を実施し，その水理特性の変化を検討した．

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] VAW, ETH-Zurich/EAWAG/LCH, EPFL(Switzerland)
• [Int'l Joint Research] National Taiwan University(ROC, Taiwan)
• [Int'l Joint Research] VAW, ETH-Zurich/EAWAG/LCH, EPFL(Switzerland)
• [Journal Article] Sediment transport in high-speed flows over a fixed bed. 1: Particle dynamics. (2017)
  • Author(s): Auel, C., Albayrak, I., Sumi, T., Boes, R.M.
  • Journal Title: Earth Surface Processes and Landforms, ESPL 1 Volume: - Issue: 9 Pages: 1365-1383
  • DOI: 10.1002/esp.4128
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Sedimentumleitstollen - eine nachhaltige Massnahme gegen Stauraumverlandung. (2017)
  • Author(s): Auel, C., Boes, R.
  • Journal Title: Wasserwirtschaft Volume: Ausgabe 4
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Application of an impact plate - bedload transport measuring system for high-speed flows. (2017)
  • Author(s): Koshiba, T., Auel, C., Tsutsumi, D., Kantoush, S.A., Sumi, T.
  • Journal Title: International Journal of Sediment Research, IJSR Volume: 印刷中
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Sediment transport in high-speed flows over a fixed bed: 2. Particle impacts and abrasion prediction (2017)
  • Author(s): Auel, C., Albayrak, I., Sumi, T., Boes, R.M.
  • Journal Title: Earth Surface Processes and Landforms, ESPL 2 Volume: - Issue: 9 Pages: 1384-1396
  • DOI: 10.1002/esp.4132
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Effects of sediment bypass tunnels on grain size distribution and benthic habitats in regulated rivers (2017)
  • Author(s): Auel, C., Kobayashi, S., Takemon, Y., Sumi, T.
  • Journal Title: International Journal of River Basin Management, JRBM Volume: 印刷中
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Improvement of a bedload transport rate measuring systems in sediment bypass tunnels. (2016)
  • Author(s): Koshiba, T., Auel, C., Tsutsumi, D., Kantoush, S.A., Sumi, T.
  • Journal Title: River Sedimentation: Proc. 13th Int. Symposium on River Sedimentation, Stuttgart, Germany (Wieprecht et al. eds.) CRC Press Volume: - Pages: 1038-1045
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Effects of sediment bypass tunnels on sediment grain size distribution and benthic habitats. (2016)
  • Author(s): Auel, C., Kobayashi, S., Sumi, T., Takemon, Y.
  • Journal Title: River Sedimentation: Proc. 13th Int. Symposium on River Sedimentation, Stuttgart, Germany (Wieprecht et al. eds.) CRC Press Volume: - Pages: 825-832
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Saltation-abrasion model for hydraulic structures. (2015)
  • Author(s): Auel C., Albayrak I., Sumi T., Boes R.M.
  • Journal Title: Proc. Int. Workshop on Sediment Bypass Tunnels, VAW-Mitteilung 232 (R. Boes ed.), ETH Zurich, Switzerland Volume: 232 Pages: 101-121
  • Open Access / Int'l Joint Research
• [Journal Article] Solis sediment bypass tunnel: First operation experiences. (2015)
  • Author(s): Auel C., Albayrak I., Sumi T., Boes R.M.
  • Journal Title: Proc. Int. Workshop on Sediment Bypass Tunnels, VAW-Mitteilung 232 (R. Boes ed.), ETH Zurich, Switzerland Volume: 232 Pages: 223-233
  • Open Access / Int'l Joint Research
• [Journal Article] Bed-load particle motion in supercritical open channel flows (2015)
  • Author(s): Auel, C., Albayrak, I., Boes, R.M.
  • Journal Title: Proc. 36th IAHR World Congress, Delft - The Hague, the Netherlands Volume: 1
  • Int'l Joint Research
• [Journal Article] Optimizing the sustainability of sediment bypass tunnels to counter reservoir sedimentation. (2015)
  • Author(s): Auel C, Hagmann M, Albayrak I, Boes RM
  • Journal Title: Proc. 25th ICOLD Congress, Q99 R31, Stavanger, Norway Volume: Q99 Pages: 431-452
  • Int'l Joint Research
• [Journal Article] Abrasion damage estimation of sediment bypass tunnels: Validation and comparison of two prediction (2015)
  • Author(s): Auel C, Boes RM, Sumi T
  • Journal Title: Annuals of DPRI Kyoto University Volume: 58B Pages: 540-549
  • Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Abrasion damage in sediment bypass tunnels. (2016)
  • Author(s): Auel, C., Sumi, T.
  • Organizer: 12th Int. Conference on Hydroscience and Engineering
  • Place of Presentation: Tainan, Taiwan
  • Year and Date: 2016-11-06
  • Int'l Joint Research
• [Presentation] Recovery of riverbed features and invertebrate community in degraded channels by sediment supply through bypass tunnel (2016)
  • Author(s): Kobayashi, S., Auel, C., Sumi, T., Takemon, Y.
  • Organizer: 12th Int. Conference on Hydroscience and Engineering
  • Place of Presentation: Tainan, Taiwan
  • Year and Date: 2016-11-06
  • Int'l Joint Research
• [Presentation] Improvement of a bedload transport rate measuring systems in sediment bypass tunnels. (2016)
  • Author(s): Koshiba, T., Auel, C., Tsutsumi, D., Kantoush, S.A., Sumi, T.
  • Organizer: 13th Int. Symposium on River Sedimentation
  • Place of Presentation: Stuttgart, Germany
  • Year and Date: 2016-09-19
  • Int'l Joint Research
• [Presentation] Effects of sediment bypass tunnels on sediment grain size distribution and benthic habitats. (2016)
  • Author(s): Auel, C., Kobayashi, S., Sumi, T., Takemon, Y.
  • Organizer: 13th Int. Symposium on River Sedimentation
  • Place of Presentation: Stuttgart, Germany
  • Year and Date: 2016-09-19
  • Int'l Joint Research
• [Presentation] Effects of sediment supply by bypass tunnels on bed topography, grain size, and invertebrate habitat. (2016)
  • Author(s): Kobayashi, S., Auel, C., Sumi, T., Takemon, Y.
  • Organizer: 20th IAHR APD Congress
  • Place of Presentation: Colombo, Sri Lanka
  • Year and Date: 2016-08-28
  • Int'l Joint Research
• [Presentation] Development of a bedload transport measuring system in sediment bypass tunnels. (2016)
  • Author(s): Koshiba, T., Sumi, T., Tsutsumi, D., Kantoush, S.A., Auel, C.
  • Organizer: 84th Annual Meeting of ICOLD
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2016-05-15
  • Int'l Joint Research
• [Presentation] Positive effects of reservoir sedimentation management on reservoir life: Examples from Japan. (2016)
  • Author(s): Auel, C., Kantoush, S.A., Sumi, T.
  • Organizer: 84th Annual Meeting of ICOLD
  • Place of Presentation: Johannesburg, South Africa
  • Year and Date: 2016-05-15
  • Int'l Joint Research
• [Presentation] Bed-load particle motion in supercritical open channel flows (2015)
  • Author(s): Auel, C., Albayrak, I., Boes, R.M.
  • Organizer: 36th IAHR World Congress
  • Place of Presentation: Delft - The Hague, the Netherlands
  • Year and Date: 2015-06-28
  • Int'l Joint Research
• [Presentation] Optimizing the sustainability of sediment bypass tunnels to counter reservoir sedimentation. (2015)
  • Author(s): Auel C, Hagmann M, Albayrak I, Boes RM
  • Organizer: 25th ICOLD Congress
  • Place of Presentation: Stavanger, Norway
  • Year and Date: 2015-06-15
  • Int'l Joint Research
• [Presentation] Saltation-abrasion model for hydraulic structures (2015)
  • Author(s): Auel C., Albayrak I., Sumi T., Boes R.M.
  • Organizer: 1st Int. Workshop on Sediment Bypass Tunnels
  • Place of Presentation: Zurich, Switzerland
  • Year and Date: 2015-04-27
  • Int'l Joint Research
• [Presentation] Abrasion Damage Estimation of Sediment Bypass Tunnels: Comparison between Swiss and Japanese Formulas (2015)
  • Author(s): Auel, C., Sumi, T.
  • Organizer: DPRI Annual Meeting
  • Place of Presentation: Uji Campus, Kyoto University
  • Year and Date: 2015-02-23
• [Remarks] 第2回排砂バイパストンネルに関する国際ワークショップ
  • URL: http://ecohyd.dpri.kyoto-u.ac.jp/index/2nd+Bypass+Tunnel+Wokshop.html
• [Funded Workshop] 1st International Workshopn on Sediment Bypass Tunnel (2015)
  • Place of Presentation: ETH-Zurich, Switzerland
  • Year and Date: 2015-04-27