2017
DOI: 10.1016/j.ecoleng.2016.11.025
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A computational fluid dynamics modeling study of guide walls for downstream fish passage

Abstract: A partial-depth, impermeable guidance structure (or guide wall) for downstream fish passage is typically constructed as a series of panels attached to a floating boom and anchored across a water body (e.g. river channel, reservoir, or power canal). The downstream terminus of the wall is generally located nearby to a fish bypass structure. If guidance is successful, the fish will avoid entrainment in a dangerous intake structure (i.e. turbine intakes) while passing from the headpond to the tailwater of a hydroe… Show more

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Cited by 11 publications
(8 citation statements)
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“…The most appropriate situation is when the power plant is installed in a headrace with no spillway, the general direction of flow then coinciding more or less with the direction of the channel. This corresponds to the idealized power canal modelled by Mulligan et al (2017Mulligan et al ( , 2018 in their CFD and laboratory study on guide walls. The only example of such a configuration that has been evaluated by radio telemetry is the guide wall installed in the inlet channel of the Bellows Falls power plant on the Connecticut River in the USA (Hanson, 1999).…”
Section: Discussionmentioning
confidence: 99%
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“…The most appropriate situation is when the power plant is installed in a headrace with no spillway, the general direction of flow then coinciding more or less with the direction of the channel. This corresponds to the idealized power canal modelled by Mulligan et al (2017Mulligan et al ( , 2018 in their CFD and laboratory study on guide walls. The only example of such a configuration that has been evaluated by radio telemetry is the guide wall installed in the inlet channel of the Bellows Falls power plant on the Connecticut River in the USA (Hanson, 1999).…”
Section: Discussionmentioning
confidence: 99%
“…The two parameters velocities under the wall and sweeping velocities are strongly related to the geometry of the wall and its depth of immersion, but also to the configuration of the forebay and the plant, the hydraulic conditions in the forebay and their variability. Research has been carried out from a purely hydraulic point of view on partial-depth guide walls (Mulligan et al, 2017(Mulligan et al, , 2018, but as the authors note in the conclusion, only a better understanding of fish behaviour can lead to real-world application of these CFD or hydraulic scale models. This was the main interest of experiments such as those carried out in Tuilières, which, in addition to the need to comply with regulatory requirements, makes it possible to better assess the fish behaviour.…”
Section: Discussionmentioning
confidence: 99%
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“…Its length was 1.67 and 1.14 m at 20 and 30 angles, respectively, so that the proportion of total channel width (50%) did not change between trials. These angles were chosen to test fish behaviour in response to the hydraulics surrounding practical deployments of guidance structures similar to those that have previously been studied (Mulligan et al, 2017(Mulligan et al, , 2018. The guide wall was painted to match the grey colour of the concrete channel.…”
mentioning
confidence: 99%
“…Raynal et al [32] investigated the hydraulic impacts of horizontal inclined bar racks in a rectangular channel by means of modeland real-scale CFD simulations. Mulligan et al [33,34] performed numerical simulations and acoustic doppler velocimeter (ADV) measurements for surface partial-depth guiding walls in a laboratory flume to assess the guiding efficiency for surface-oriented fish species. A similar study was performed by Lundström et al [35] who investigated the guiding potential of a surface guide wall at the Sikfors HPP in Sweden assessing the surface-orientated downstream migration of fish salmon smolts.…”
mentioning
confidence: 99%