Corrigendum to “Implementation of tidal turbines in MIKE 3 and Delft3D models of Pentland Firth & Orkney waters” [Ocean Coast. Manag. 147 (2017) 21–36]

© 2017 Elsevier Ltd The authors regret that a software error caused incorrect predictions for the effects of tidal turbines in Delft3D. The predictions without turbines are unaffected, as are those from the MIKE 3 model. The overall conclusions of the article remain valid. Figs. 12–15 as published are incorrect. Replacements for Figs. 12–14 are presented here. Following this correction the differences in the effects of energy extraction between the two models are much smaller. As a result the discussion of these differences in Section 6 should be disregarded, and Fig. 15 is no longer required. The authors would like to apologise for any inconvenience caused. The version of the code for adding turbines to Delft3D that is publicly available has been corrected, and anybody using this for their own work is urged to download the latest version. [Figure presented] Fig. 12: (a) 400 turbines in the Inner Sound, viewed through the MIKE Zero GUI; (b) The same 400 turbines represented as porous plates for Delft3D. Higher values of the closs parameter, shown by bluer colours, indicate plates with higher drag. [Figure presented] Fig. 13: Changes in mean current speeds over 28 days as a result of adding turbines. [Figure presented] Fig. 14: Change in mean bed stress magnitude over 28 days as a result of adding turbines, expressed as a proportion of the value without turbines

Large scale three-dimensional modelling for wave and tidal energy resource and environmental impact : methodologies for quantifying acceptable thresholds for sustainable exploitation

We describe a modelling project to estimate the potential effects of wave & tidal stream renewables on the marine environment. • Realistic generic devices to be used by those without access to the technical details available to developers are described. • Results show largely local sea bed effects at the level of the currently proposed renewables developments in our study area. • Large scale 3D modelling is critical to quantify the direct, indirect and cumulative effects of renewable energy extraction. • This is critical to comply with planning & environmental impact assessment regulations and achieve Good Environmental Status

Implementation of tidal turbines in MIKE 3 and Delft3D models of Pentland Firth & Orkney Waters

© 2017 Elsevier Ltd As part of the Terawatt project, two regional-scale hydrodynamic models of the Pentland Firth & Orkney waters were developed using unaltered commercially-available software (MIKE 3 and Delft3D), in order to investigate the suitability of such software for predicting the effects of tidal stream energy development. Realistic scenarios for tidal energy extraction were implemented in each, and the predictions of the models with and without turbines compared. Similar predictions were made of depth-averaged current speed (spatial correlation of R2=0.95), but bed stress in one model was more than double that in the other due to the use of different values for bed resistance. The effects of energy extraction are consistent between the models at a regional scale but show considerable local differences. We conclude that these model codes are suitable for broad-scale assessment of the effects of energy extraction but that caution, and more detailed survey data, is required at fine scales

Large scale three-dimensional modelling for wave and tidal energy resource and environmental impact: Methodologies for quantifying acceptable thresholds for sustainable exploitation

Highlights•We describe a modelling project to estimate the potential effects of wave & tidal stream renewables on the marine environment.•Realistic generic devices to be used by those without access to the technical details available to developers are described.•Results show largely local sea bed effects at the level of the currently proposed renewables developments in our study area.•Large scale 3D modelling is critical to quantify the direct, indirect and cumulative effects of renewable energy extraction.•This is critical to comply with planning & environmental impact assessment regulations and achieve Good Environmental Status