Operational noise from tidal turbine arrays and the accessment of collision risk with marine mammals

2017 ◽  
Vol 141 (5) ◽  
pp. 3921-3921
Author(s):  
Brett Marmo
Keyword(s):  
Marine Mammals ◽  
Collision Risk ◽  
Tidal Turbine ◽  
Turbine Arrays

scholarly journals Applying a simple model for estimating the likelihood of collision of marine mammals with tidal turbines

2018 ◽  
Vol 1 (1 (Aug)) ◽  
pp. 27-33 ◽  
Author(s):  
A. E. Copping ◽  
M. E. Grear
Keyword(s):  
Simple Model ◽  
Potential Risk ◽  
Real World ◽  
Marine Mammals ◽  
Turbine Blades ◽  
Collision Risk ◽  
Risk Models ◽  
Collision Model ◽  
Tidal Turbines ◽  
Tidal Turbine

As tidal turbine deployments continue at test sites and in commercial areas, the potential risk for injury or death of marine mammals from colliding with rotating turbine blades continues to confound efficient consenting (permitting) of devices. Direct observation of collisions is technically very challenging and costly. Estimates of collision risk to date have been derived from complex collision risk models that depend on estimates of the number of marine mammals found in the area. Using a simple collision model, the risk of collision was examined at three real-world sites, each of which featured an indigenous marine mammal. Two different turbine designs were examined at each site to extend the range of the estimates. The results of the model runs allow for comparison of risk at a range of tidal sites for a variety of the marine mammals thought to be at potential risk.

Quantifying the effects of tidal turbine array operations on the distribution of marine mammals: Implications for collision risk

2021 ◽  
Author(s):  
Joe Onoufriou ◽  
Debbie J.F. Russell ◽  
Dave Thompson ◽  
Simon E. Moss ◽  
Gordon D. Hastie
Keyword(s):  
Marine Mammals ◽  
Collision Risk ◽  
Tidal Turbine

scholarly journals Passive acoustic methods for tracking the 3D movements of small cetaceans around marine structures

2020 ◽  
Author(s):  
Douglas Gillespie ◽  
Laura Palmer ◽  
Jamie Macaulay ◽  
Carol Sparling ◽  
Gordon Hastie
Keyword(s):  
Marine Mammals ◽  
New Technologies ◽  
Three Dimensional ◽  
Tidal Energy ◽  
Time Of Arrival ◽  
Marine Animals ◽  
Tidal Turbines ◽  
Wide Range ◽  
Tidal Turbine ◽  
Passive Acoustic

AbstractA wide range of anthropogenic structures exist in the marine environment with the extent of these set to increase as the global offshore renewable energy industry grows. Many of these pose acute risks to marine wildlife; for example, tidal energy generators have the potential to injure or kill seals and small cetaceans through collisions with moving turbine parts. Information on fine scale behaviour of animals close to operational turbines is required to understand the likely impact of these new technologies. There are inherent challenges associated with measuring the underwater movements of marine animals which have, so far, limited data collection. Here, we describe the development and application of a system for monitoring the three-dimensional movements of cetaceans in the immediate vicinity of a subsea structure. The system comprises twelve hydrophones and software for the detection and localisation of vocal marine mammals. We present data demonstrating the systems practical performance during a deployment on an operational tidal turbine between October 2017 and October 2019. Three-dimensional locations of cetaceans were derived from the passive acoustic data using time of arrival differences on each hydrophone. Localisation accuracy was assessed with an artificial sound source at known locations and a refined method of error estimation is presented. Calibration trials show that the system can accurately localise sounds to 2m accuracy within 20m of the turbine but that localisations become highly inaccurate at distances greater than 35m. The system is currently being used to provide data on rates of encounters between cetaceans and the turbine and to provide high resolution tracking data for animals close to the turbine. These data can be used to inform stakeholders and regulators on the likely impact of tidal turbines on cetaceans.

scholarly journals Tidal current power effects on nearby sandbanks: a case study in the Race of Alderney

2020 ◽  
Vol 378 (2178) ◽  
pp. 20190503 ◽  
Author(s):  
Luke S. Blunden ◽  
Stephen G. Haynes ◽  
AbuBakr S. Bahaj
Keyword(s):  
Sediment Transport ◽  
Tidal Energy ◽  
Sand Wave ◽  
Sand Transport ◽  
Tidal Dynamics ◽  
Tidal Flows ◽  
Tidal Turbine ◽  
Turbine Arrays ◽  
Sediment Model

A validated numerical model of tidal flows and sediment transport around the Alderney South Banks was used to investigate the potential effects of large (300 MW) tidal turbine arrays at different locations in Alderney territorial waters. Two methods were used, firstly looking at hydrodynamic changes only and secondly modelling sediment transport over a non-erodible bed. The baseline hydrodynamic model was validated relative to ADCP velocity data collected in the immediate vicinity of the sandbank. Real-world sand transport rates were inferred from sand-wave migrations and agree favourably with sediment transport residuals calculated from model outputs. Outputs from the sediment model reproduced realistic morphological behaviours over the bank. Seventeen different locations were considered; most did not result in significant hydrodynamic changes over the South Banks; however, three array locations were singled out as requiring extra caution if development were to occur. The results provide a case for optimizing the array locations for twin objectives of maximizing array power and minimizing impacts on the sandbanks. This article is part of the theme issue ‘New insights on tidal dynamics and tidal energy harvesting in the Alderney Race’.

scholarly journals Performance of non-uniform tidal turbine arrays in uniform flow

2018 ◽  
Vol 4 (3) ◽  
pp. 231-241 ◽  
Author(s):  
Paul A. J. Bonar ◽  
Thomas A. A. Adcock ◽  
Vengatesan Venugopal ◽  
Alistair G. L. Borthwick
Keyword(s):  
Uniform Flow ◽  
Tidal Turbine ◽  
Turbine Arrays

scholarly journals Surrogate-Based Optimization of Tidal Turbine Arrays: A Case Study for the Faro-Olhão Inlet

2019 ◽  
pp. 548-561
Author(s):  
Eduardo González-Gorbeña ◽  
André Pacheco ◽  
Theocharis A. Plomaritis ◽  
Óscar Ferreira ◽  
Cláudia Sequeira ◽  
...  
Keyword(s):  
Surrogate Based Optimization ◽  
Tidal Turbine ◽  
Turbine Arrays

scholarly journals Capturing the development and interactions of wakes in tidal turbine arrays using a coupled BEM-DES model

2019 ◽  
Vol 181 ◽  
pp. 71-88 ◽  
Author(s):  
Daniel Gajardo ◽  
Cristián Escauriaza ◽  
David M. Ingram
Keyword(s):  
Tidal Turbine ◽  
Turbine Arrays ◽  
Des Model

scholarly journals Using coupled hydrodynamic biogeochemical models to predict the effects of tidal turbine arrays on phytoplankton dynamics

2016 ◽  
Author(s):  
Pia Schuchert ◽  
Louise Kregting ◽  
Daniel Pritchard ◽  
Graham Savidge ◽  
Björn Elsäßer
Keyword(s):  
Large Scale ◽  
Natural Variation ◽  
Tidal Energy ◽  
Phytoplankton Dynamics ◽  
Hydrodynamic Models ◽  
Energy Device ◽  
Active Radiation ◽  
Biogeochemical Models ◽  
Tidal Turbine ◽  
Turbine Arrays

Abstract. Coupled 2-dimensional biogeochemical and hydrodynamic models offer the opportunity to predict potential effects of large scale tidal energy device (TED) arrays on the local and regional phytoplankton dynamics in coastal and inshore environments. In an idealised environment the effect of TEDs on phytoplankton dynamics accounted for up to 25 % in phytoplankton concentrations, most likely associated with an increased residence time in an inshore basin. However, natural variation such as the intensity of photosynthetically active radiation had a larger effect on phytoplankton dynamics.

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