Tidal resource extraction in the Pentland Firth, UK: Potential impacts on flow regime and sediment transport in the Inner Sound of Stroma. Martin-Short, R, Hill, J, Kramer, S C, Avdis, A, Allison, P A, & Piggott, M D Renewable Energy, 76(0):596–607, April, 2015.
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Abstract Large-scale extraction of power from tidal streams within the Pentland Firth is expected to be underway in the near future. The Inner Sound of Stroma in particular has attracted significant commercial interest. To understand potential environmental impacts of the installation of a tidal turbine array a case study based upon the Inner Sound is considered. A numerical computational fluid dynamics model, Fluidity, is used to conduct a series of depth-averaged simulations to investigate velocity and bed shear stress changes due to the presence of idealised tidal turbine arrays. The number of turbines is increased from zero to 400. It is found that arrays in excess of 85 turbines have the potential to affect bed shear stress distributions in such a way that the most favourable sites for sediment accumulation migrate from the edges of the Inner Sound towards its centre. Deposits of fine gravel and coarse sand are indicated to occur within arrays of greater than 240 turbines with removal of existing deposits in the shallower channel margins also possible. The effects of the turbine array may be seen several kilometres from the site which has implications not only on sediment accumulation, but also on the benthic fauna.
@ARTICLE{Martin-Short2015-hq,
  title    = "{Tidal resource extraction in the Pentland Firth, UK: Potential
              impacts on flow regime and sediment transport in the Inner Sound
              of Stroma}",
  author   = "Martin-Short, R and Hill, J and Kramer, S C and Avdis, A and
              Allison, P A and Piggott, M D",
  abstract = "Abstract Large-scale extraction of power from tidal streams
              within the Pentland Firth is expected to be underway in the near
              future. The Inner Sound of Stroma in particular has attracted
              significant commercial interest. To understand potential
              environmental impacts of the installation of a tidal turbine
              array a case study based upon the Inner Sound is considered. A
              numerical computational fluid dynamics model, Fluidity, is used
              to conduct a series of depth-averaged simulations to investigate
              velocity and bed shear stress changes due to the presence of
              idealised tidal turbine arrays. The number of turbines is
              increased from zero to 400. It is found that arrays in excess of
              85 turbines have the potential to affect bed shear stress
              distributions in such a way that the most favourable sites for
              sediment accumulation migrate from the edges of the Inner Sound
              towards its centre. Deposits of fine gravel and coarse sand are
              indicated to occur within arrays of greater than 240 turbines
              with removal of existing deposits in the shallower channel
              margins also possible. The effects of the turbine array may be
              seen several kilometres from the site which has implications not
              only on sediment accumulation, but also on the benthic fauna.",
  journal  = "Renewable Energy",
  volume   =  76,
  number   =  0,
  pages    = "596--607",
  month    =  apr,
  year     =  2015,
  keywords = "Tidal energy; Modelling; Pentland Firth; Finite element",
  issn     = "0960-1481",
  doi      = "10.1016/j.renene.2014.11.079"
}

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