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2012), a review of the results of any site-specific boat and / or aerial surveys and the ornithological literature.
45.
The model applies the migration pathways that were published in the SOSS 05 report (Wright et al., 2012).
It operates on the assumption of straight line migration
between the European coastline and UK SPAs. The European coastline is split into 1 km segments and each segment is joined to each SPA within the UK to form the migration lines. The migration lines that fall only within the migration boundary of the species of interest are included. SPAs are only included if the species being assessed is associated with them as an interest feature. Significant staging areas can also be incorporated where applicable. Migration lines are identified as being within or outwith the windfarm development area of interest. Species numbers are randomly assigned across the migration lines to identify the proportion that would pass through the windfarm area. This is repeated by the model many times to account for uncertainty and to calculate 95% confidence intervals. Bird numbers travelling along migration lines that fall within the windfarm area are calculated and this number used as the input to a collision risk model.
46. Further details of the method are provided in Appendix 4.
47. Discussion is proposed on this migration modelling method for assessment at the project level at OETG Mtg 2.
48.
The approach to migration modelling will focus on the proposed East Anglia THREE and East Anglia FOUR and will not be used to carry out an assessment of the combined impacts on windfarms constructed or proposed in Rounds 1, 2 and 3 and Scottish Territorial Waters. EAOW believe that such work is a strategic level assessment that is the responsibility of Government and not an individual project developer.