Meso avoidance, quantified by comparing the observed distribution of bird track density (measured as track length per unit area) inside the rotor swept zone (considering a 10 m buffer) within the wind farm, with an hypothetical pre-construction situation in which the same bird track density would have been observed in the whole area (inside and outside to rotor swept zone and buffer). Micro avoidance considered bird movement in relation to the rotor. It was quantified by calculating the proportion of birds adjusting flight pattern/behaviour in response to the presence of blades. The BCA study is now in the final phase, and the project steering group and expert panel have seen drafts of the final report. The SNCBs think that further work is required in order to understand how best to use the outputs from the ORJIP BCA study. We can envisage two options for how to best make use of the ORJIP BCA outputs; The ORJIP BCA study provides another piece of evidence to sit alongside that summarised in Cook et al (2014), for avoidance rates which should be used within Band (2012). A new and innovative means of assessing likely impact can be developed using the evidence from the ORJIP BCA work. This contract involves assessing the evidence resulting from the ORJIP BCA project with regards to OWF impact assessment and estimation of collision risk or magnitude from proposed OWF developments. It should directly aid the SNCBs in making the most appropriate use of the ORJIP BCA project outputs. Project Objectives The objectives of this project are to: Provide a clear assessment of how the empirically estimated avoidance rates such as those estimated as part of the ORJIP BCA project should (or should not) be fed into a Band (2012) basic, and/or Band (2012) extended, model. Suggest innovative solution(s) for the most appropriate use of the BCA project outputs within risk assessment, with worked example(s) if time allows. Work elements There are broadly two elements to this work, although we remain open to suggestions about pieces of work that can contribute towards meeting the aim and objectives of this project. An exploration of the Band 2012 model, providing a breakdown with reference to empirically estimated avoidance rates such as those measured in ORJIP BCA project. This can be further broken down onto two sub-elements:
Meso avoidance, quantified by comparing the observed distribution of bird track density (measured as track length per unit area) inside the rotor swept zone (considering a 10 m buffer) within the wind farm, with an hypothetical pre-construction situation in which the same bird track density would have been observed in the whole area (inside and outside to rotor swept zone and buffer). Micro avoidance considered bird movement in relation to the rotor. It was quantified by calculating the proportion of birds adjusting flight pattern/behaviour in response to the presence of blades. The BCA study is now in the final phase, and the project steering group and expert panel have seen drafts of the final report. The SNCBs think that further work is required in order to understand how best to use the outputs from the ORJIP BCA study. We can envisage two options for how to best make use of the ORJIP BCA outputs; The ORJIP BCA study provides another piece of evidence to sit alongside that summarised in Cook et al (2014), for avoidance rates which should be used within Band (2012). A new and innovative means of assessing likely impact can be developed using the evidence from the ORJIP BCA work. This contract involves assessing the evidence resulting from the ORJIP BCA project with regards to OWF impact assessment and estimation of collision risk or magnitude from proposed OWF developments. It should directly aid the SNCBs in making the most appropriate use of the ORJIP BCA project outputs. Project Objectives The objectives of this project are to: Provide a clear assessment of how the empirically estimated avoidance rates such as those estimated as part of the ORJIP BCA project should (or should not) be fed into a Band (2012) basic, and/or Band (2012) extended, model. Suggest innovative solution(s) for the most appropriate use of the BCA project outputs within risk assessment, with worked example(s) if time allows. Work elements There are broadly two elements to this work, although we remain open to suggestions about pieces of work that can contribute towards meeting the aim and objectives of this project. An exploration of the Band 2012 model, providing a breakdown with reference to empirically estimated avoidance rates such as those measured in ORJIP BCA project. This can be further broken down onto two sub-elements:
Bird_Collision_Annex%20A.docx