BIRD AND BAT MONITORING: EXPERIENCES FROM A PRIVATE … BIRD AND BAT MONITORING IAIA... · BIRD AND...
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Transcript of BIRD AND BAT MONITORING: EXPERIENCES FROM A PRIVATE … BIRD AND BAT MONITORING IAIA... · BIRD AND...
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BIRD AND BAT MONITORING: EXPERIENCES
FROM A PRIVATE WIND POWER PRODUCER
Marianela González Oviedo
Environmental and Social Compliance Coordinator
private wind power producer experiences
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>GME
>GENERAL
RESULTS
>EXPERIENCES
AGENDA
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Globeleq Mesoamerica Energy
> GME is Central America’s leading wind energy company
•243 MW Installed capacity
•80 MW under construction
•300 MW in the pipeline
•2004 GME completed its first transaction with the
acquisition of a 23MW operating wind farm in Costa Rica.
•Since then, the company has closed on financing of 7
additional wind projects
•Main focus: greenfield development. But will pursue the
acquisition of operating and development projects as the
opportunities present themselves.
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Globeleq Mesoamerica Energy
> Shareholders:
Founder. Owns 30% Acquired 70% in 2010.
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PROJECTS
PESRL (23 MW)
-First utility scale wind
generation plant in LA.
-CO: 1996
CDH (126 MW)
-One of the largest wind
farms in CA.
-CO: December 2011
EOLO (44 MW)
-CO: December 2012
OROSI (50 MW)
-CO: September 2015
ALISIOS (80 MW)
-Const: Dec 2015
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GENERAL RESULTS
> 2 full years of monitoring in wind farm “A”
> In 2015 more than 50 complete rounds of searching have been
conducted in wind farms “A”, ‘B” and ‘C”
> In wind farms “A” and “B” bat mortality is higher than bird mortality
> In wind farm “A”:
•Consultants concluded that mortality events involving insectivorous
bats could be predictable: occur on nights with low winds, roughly two
months after a period with heavy rains.
•Observed bird mortality was higher among migrants, than among
residents
•The majority (94%) of migrant casualties in 2014 were nocturnal
migrants
> NO strike victims of migrant raptors have been found in any of the
wind farms.
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EXPERIENCIES: METHOD
> Unsafe terrain and low visibility due to vegetation
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METHOD
> Monitoring only the gravel roads and turbine pads by applying a
novel, anisotropic density-weighted area correction factor.
•The model is founded on International standard methodology
(Strickland et al 2011) for statistical estimation of fatalities,
along with innovative area correction components based on
recent scientific advances (Huso et al 2014, Rabie et al
2014).
•Uses the actual spatial distribution of carcasses discovered
at the site. It effectively models anisotropic carcass
distributions (i.e. not radially symmetric around the turbine),
that arise when there is a strong prevailing wind pattern at a
wind facility.
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METHOD
> Restricted search effort minimizes error due to high searcher
efficiency and also maximizes search effort efficiency by eliminating
searching on substrates with low searchability such as the tall
pasture grass.
> Enables a single person to search all of the turbines at the sites in a
single, full day of effort (search time per turbine: 15 min).
•Search all turbines at each facility once per week
> Twice per quarter: searcher efficiency experiments are conducted
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CHALLENGES
> Very limited publicly available data and publications
•Limited understanding of triggers for mitigation measures, mitigation
effectiveness and cumulative impacts.
> Lack of local legislation in Central America in regards to wind farms
impacts on birds and bats
•Sometimes local requirements are based on personal opinions and
understandings and not on best practices
> The industry needs to share more information to reduce risks associated
with bad decisions based on limited data.
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FUTURE CHALLENGES
> Measure/monitor the impact of mitigation measures
> Make more information public
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Thank you!