Journal: The International Journal on Hydropower & Dams

Abbreviation

Int. J. Hydropower Dams

Publisher

Aqua-Media International

Journal Volumes

ISSN

1352-2523

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Publications1 - 9 of 9
  • Adapted reservoir management in the Zambezi river basin to meet environmental needs
    Item type: Journal Article
    Mertens, Jasmin; Wehrli, Bernhard; Tilmant, Amaury; et al. (2013)
    The International Journal on Hydropower & Dams
  • Reviewing research and experience on sediment bypass tunnels
    Item type: Journal Article
    Hagmann, Michelle; Albayrak, Ismail; Boes, Robert; et al. (2016)
    The International Journal on Hydropower & Dams
  • Optimised Coanda screen for hydropower and fish
    Item type: Journal Article
    Lifa, I.; Braun-Badertscher, S.; Boes, Robert (2023)
    The International Journal on Hydropower & Dams
    The water supply for hydropower plants in Switzerland, is predominantly sourced from gravel-rich mountain streams using Tyrolean weirs. However, to keep solids out of the turbine water system, a sand trap must be installed. Furthermore, the Tyrolean weir inhibits fish migration. For these reasons, Coanda screens are increasingly used as water catchment systems, although scientifically unsubstantiated facts on the degree of rejection of solids and fish-friendliness are still circulating. This article helps to clarify various assumptions about Coanda screens. Some are supported, others are discarded.
  • Pier waves in sloping chutes
    Item type: Journal Article
    Reinauer, Roger; Hager, Willi H. (1997)
    The International Journal on Hydropower & Dams
    Waves behind chute piers generate shock waves which can lead to overtopping in surface spillways, and surging in tunnel spillways. The hydraulic features of pier waves are determined in sloping chutes, and a simple method of reduction is proposed. The results are presented in a generalized form which can be used directly in applications.
  • Performance of a counter-current type stilling basin
    Item type: Journal Article
    Hager, Willi H. (1996)
    The International Journal on Hydropower & Dams
    The performance of a stilling basin with counter-current flow was considered both experimentally and analytically. Depending on the position and height of the counter-current element relative to the approach section either poor boil type flow or effective counter-current type flow are induced. Based on an extended research programme, the optimum basin geometry was determined, together with information regarding the headwall and tailwater heights, and the dimensions of the secondary stilling basin. The design was compared with the 'simple' hydraulic stilling jump basin, and the USBR impact basin. The novel design performs well for high Froude numbers if a small tailwater depth is available.
  • Hydraulic design of stepped spillways for RCC dams
    Item type: Journal Article
    Boes, Robert; Minor, Hans-Erwin (2002)
    The International Journal on Hydropower & Dams
    Stepped spillways for discharging excess flood waters have gained significant interest among researchers and dam engineers, both for new dams and for armoring existing embankment dams. Its main advantage was the significant energy dissipation along the chute as a result of the macro-roughness of the steps, and the reduced cavitation risk because of the greatly reduced flow velocities and the large amount of air entrainment. This paper focuses on significant findings of the research program and the development of design guidance to reduce the need for individual physical model studies.
  • Determining minimal residual flow at waterfalls used for hydropower
    Item type: Journal Article
    Hiller, Priska; Steffen, Kathrina; Boes, Robert; et al. (2011)
    The International Journal on Hydropower & Dams
  • Design and construction of the sediment bypass tunnel at Solis
    Item type: Journal Article
    Auel, Christian; Boes, Robert; Ziegler, Thomas; et al. (2011)
    The International Journal on Hydropower & Dams
  • Spacing of chute aerators for cavitation protection
    Item type: Journal Article
    Kramer, Kristian; Minor, H.-E.; Hager, Willi H. (2005)
    The International Journal on Hydropower & Dams
Publications1 - 9 of 9