@inproceedings{MuellerHagemannAuelAlbaryaketal.2018,
  author    = {M{\"u}ller-Hagemann, M. and Auel, C. and Albaryak, I. and Boes, R.M.},
  title     = {Bedload transport and hydro-abrasive erosion at steep bedrock rivers and hydraulic structures},
  series = {Riverflow, Lyon, France},
  booktitle = {Riverflow, Lyon, France},
  year      = {2018},
  language  = {en}
}
@inproceedings{HagemannAuelAlbayraketal.2012,
  author    = {Hagemann, M. and Auel, C. and Albayrak, I. and Boes, R.M.},
  title     = {Hydroabrasion in Sedimentumleitstollen},
  series = {Proc. 35. Dresdner Wasserbaukolloquium. "Staubauwerke - Planen, Bauen, Betreiben", Wasserbauliche Mitteilungen Heft 47},
  booktitle = {Proc. 35. Dresdner Wasserbaukolloquium. "Staubauwerke - Planen, Bauen, Betreiben", Wasserbauliche Mitteilungen Heft 47},
  doi       = {10.25974/fhms-15161},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151612},
  pages     = {95 -- 104},
  year      = {2012},
  abstract  = {Sedimentumleitstollen leiten die sedimentreichen Hochwasserspitzen um die Tal-sperre herum in den Unterlauf des Flusses und verhindern so eine fortschreitende Verlandung des Stauraums. Aufgrund der hohen Fließgeschwindigkeiten und gro-ßen Sedimentfrachten in Umleitstollen weisen diese starke Verschleißerscheinun-gen auf, die zu hohen Unterhaltskosten f{\"u}hren. Es gibt verschiedene Konzepte um diesem Problem entgegen zu wirken. Einerseits kann der Umleitstollen hydrau-lisch optimiert werden, um die Belastung auf die Sohle zu minimieren. Auf der anderen Seite kann der Widerstand der Stollensohle verbessert werden. An der Versuchsanstalt f{\"u}r Wasserbau, Hydrologie und Glaziologie (VAW) der ETH Z{\"u}-rich werden zur Zeit zwei Forschungsarbeiten durchgef{\"u}hrt, die sich diesen zwei Aspekten widmen. In großskaligen Laborversuchen erfolgt eine systematische Untersuchung und Optimierung der maßgebenden Parameter wie Fortbewegungs-art des Sediments und Abrasionstiefe der Stollensohle. Anhand von Prototypver-suchen im neu errichteten Sedimentumleitstollen Solis in Graub{\"u}nden (Schweiz) werden die Zusammenh{\"a}nge zwischen Beanspruchung, Materialeigenschaften und Abrasion im Prototyp ermittelt. Darauf basierend k{\"o}nnen Empfehlungen be-z{\"u}glich Materialwahl, konstruktiver Durchbildung und Dimensionierung abgege-ben und so zu einer nachhaltigen und wirtschaftlichen Wasserbewirtschaftung in Stauseen beigetragen werden.},
  language  = {de}
}
@article{HagemannAlbayrakBoesetal.2016,
  author    = {Hagemann, M. and Albayrak, I. and Boes, R.M. and Auel, C. and Sumi, T.},
  title     = {Reviewing research and experience on sediment bypass tunnels},
  series = {Int. Journal on Hydropower and Dams},
  journal   = {Int. Journal on Hydropower and Dams},
  pages     = {54 -- 58},
  year      = {2016},
  language  = {en}
}
@inproceedings{BoesHagemannMuellerAlbaryaketal.2018,
  author    = {Boes, R.M. and Hagemann-M{\"u}ller, M. and Albaryak, I. and M{\"u}ller, B. and Caspescha, L. and Flepp, A. and Jacobs, F. and Auel, C.},
  title     = {Sediment bypass tunnels: Swiss experiences with bypass efficiency and abrasion-resistant invert materials},
  series = {VINGT SIXI{\`E}ME CONGR{\`E}S DES GRANDS BARRAGES, Vienne, Juillet 2018},
  booktitle = {VINGT SIXI{\`E}ME CONGR{\`E}S DES GRANDS BARRAGES, Vienne, Juillet 2018},
  publisher = {COMMISSION INTERNATIONALE DES GRANDES BARRAGES},
  doi       = {10.25974/fhms-15139},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151399},
  year      = {2018},
  abstract  = {In this paper typical bypass efficiencies of sediment bypass tunnels (SBTs) used to counter reservoir sedimentation are described, distinguishing between two layouts of the tunnel intake. It results that SBTs are an effective measure to reduce the sedimentation of dam reservoirs, particularly of type (A) with intake at the reservoir head. The hydroabrasive wear of tunnel inverts is significant and has to be mitigated by using adequate invert liners. The invert abrasion can be estimated based on an abrasion model where a correct input value of the bed material resistance coefficient is paramount to limit model uncertainties. Based on abrasion measurements at prototype SBTs typical values of the material resistance coefficient are recommended for high-strength concrete, natural stones and steel liners. The field experiences gathered so far and the comparison of various invert materials suggest granite pavers as a promising lining material for severe abrasion conditions.},
  language  = {en}
}
@inproceedings{BoesAuelHagemannetal.2014,
  author    = {Boes, R.M. and Auel, C. and Hagemann, M. and Albayrak, I.},
  title     = {Sediment bypass tunnels to mitigate reservoir sedimentation and restore sediment continuity},
  series = {Reservoir Sedimentation},
  booktitle = {Reservoir Sedimentation},
  publisher = {Taylor and Francis Group},
  address   = {London, UK},
  isbn      = {978-1-138-02675-9},
  doi       = {10.25974/fhms-15156},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151569},
  pages     = {221 -- 228},
  year      = {2014},
  abstract  = {Worldwide, a large number of reservoirs impounded by dams are rapidly filling up with sediments. As on a global level the loss of reservoir volume due to sedimentation increases faster than the creation of new storage volume, the sustainability of reservoirs may be questioned if no countermeasures are taken. This paper gives an overview of the amount and the processes of reservoir sedimentation and its impact on dams and reservoirs. Furthermore, sediment bypass tunnels as a countermeasure for small to medium sized reservoirs are discussed with their pros and cons. The issue of hydroabrasion is highlighted, and the main design features to be applied for sediment bypass tunnels are given.},
  language  = {en}
}
@inproceedings{AuelTheneMuellerHagemannetal.2017,
  author    = {Auel, C. and Thene, J.R. and M{\"u}ller-Hagemann, M. and Albaryak, I. and Boes, R.M.},
  title     = {Abrasion prediction at Mud Mountain sediment bypass tunnel},
  series = {Proc. 2nd Int. Workshop on Sediment Bypass Tunnels, FP12, Kyoto, Japan},
  booktitle = {Proc. 2nd Int. Workshop on Sediment Bypass Tunnels, FP12, Kyoto, Japan},
  publisher = {ETH Zurich},
  doi       = {10.25974/fhms-15142},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151422},
  year      = {2017},
  abstract  = {A major drawback of sediment bypass tunnels is the potential for severe invert abrasion due to intense bedload sediment transport. This paper briefly describes the abrasion phenomena as well as the available models used to predict invert material loss. The application and calibration is demonstrated on the basis of the Mud Mountain sediment bypass tunnel, Washington, USA.},
  language  = {en}
}
@inproceedings{AuelTheneCarrolletal.2018,
  author    = {Auel, C. and Thene, J.R. and Carroll, J. and Holmes, C. and Boes, R.M.},
  title     = {Rehabilitation of the Mud Mountain bypass tunnel invert},
  series = {VINGT SIXI{\`E}ME CONGR{\`E}S DES GRANDS BARRAGES Vienne, Juillet 2018},
  booktitle = {VINGT SIXI{\`E}ME CONGR{\`E}S DES GRANDS BARRAGES Vienne, Juillet 2018},
  publisher = {COMMISSION INTERNATIONALE DES GRANDES BARRAGES},
  doi       = {10.25974/fhms-15141},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151413},
  year      = {2018},
  abstract  = {This paper describes the design of the new tunnel invert lining of the 9-foot tunnel at Mud Mountain Dam, Washington, USA. The tunnel diverts all bed load sediments into the tailwater. Major invert abrasion has been observed in the existing steel lining. The new invert design consists of 0.59 m2 and 0.79 m2 granite blocks that are 0.25 m thick and placed tightly together along the tunnel. Stability analysis showed factors of safety ranging from 1.2 to 2.6 against uplift. This will be achieved with strip drains placed in the bedding material along the tunnel. A service-design-life analysis was performed using abrasion prediction modelling. This model was based on abrasion measurement data acquired from granite field tests at Pfaffensprung sediment bypass tunnel, Switzerland. The estimated annual abrasion depths for the granite were approximately 0.50 mm/year for average sediment transport conditions.},
  language  = {en}
}
@inproceedings{AuelHagemannAlbayraketal.2015,
  author    = {Auel, C. and Hagemann, M. and Albayrak, I. and Boes, R.M.},
  title     = {Optimizing the sustainability of sediment bypass tunnels to counter reservoir sedimentation},
  series = {Proc. 25th ICOLD Congress, Q99 R31, Stavanger, Norway},
  booktitle = {Proc. 25th ICOLD Congress, Q99 R31, Stavanger, Norway},
  publisher = {ICOLD},
  doi       = {10.25974/fhms-15151},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151518},
  pages     = {431 -- 452},
  year      = {2015},
  abstract  = {In order to prevent reservoir sedimentation, sediment bypass tunnels can be an efficient countermeasure restoring sediment continuity of impounded rivers. Although supercritical open channel flow conditions in these tunnelsprevent tun-nel blockage, in combination with the high bypassed sediment volume it may lead tosevere abrasion damages on inverts. Consequently,wear termed hydroabra-sionoccurs. Based on laboratoryexperiments, a theoretical model was devel-oped to predict abrasion rates and service life timeof sediment bypass tunnels. Insituexperiments are further conducted for model calibration to provide an abrasion prediction approach for field applications.Finally,recommendations concerning the hydraulic design of the tunnel as well as the structural design ofthe invertareprovided.},
  language  = {en}
}
@inproceedings{AuelBoesSumi2015,
  author    = {Auel, C. and Boes, R.M. and Sumi, T.},
  title     = {Abrasion damage estimation of sediment bypass tunnels: Validation and comparison of two prediction models},
  series = {Annuals of Disaster Prevention Research Institute 58B, Kyoto University, Japan},
  booktitle = {Annuals of Disaster Prevention Research Institute 58B, Kyoto University, Japan},
  publisher = {Kyoto University},
  doi       = {10.25974/fhms-15154},
  url       = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-151547},
  pages     = {540 -- 549},
  year      = {2015},
  abstract  = {Abrasion damage estimation of sediment bypass tunnels: Validation and comparison of two prediction models. Annuals of Disaster Prevention Research Institute 58B, Kyoto Univer-sity, Japan},
  language  = {en}
}
@article{AuelBoesSumi2018,
  author    = {Auel, C. and Boes, R.M. and Sumi, T.},
  title     = {Abrasion prediction at Asahi sediment bypass tunnel based on Ishibashi's formula},
  series = {Journal of Applied Water Engineering and Research},
  journal   = {Journal of Applied Water Engineering and Research},
  doi       = {10.1080/23249676.2016.1265470},
  pages     = {125 -- 138},
  year      = {2018},
  abstract  = {Abrasion in a concrete-lined sediment bypass tunnel is estimated using a Japanese state-of-the-art prediction model and validated by measured invert abrasion data at Asahi Reservoir, Japan. The model is described in detail, certain shortcomings are disclosed, and a revised version is proposed. The model consists of a kinetic energy term accounting for the impact by saltating particles, and a friction work term accounting for the grinding stress. It is found that the latter term yields concrete abrasion values being consistently a multiple compared to its kinetic term contradicting other research. Based on that, and a possible particle impact angle inconsistency, it is proposed to omit the friction work term. It is shown that the calculated abrasion is overestimated by 138\% on average compared with that measured, if both terms are accounted for. However, promising results are obtained with only 30\% overestimation by neglecting the friction work term.},
  language  = {en}
}