74aaabd9fee12b1ff8d2feaf46948d6a
eng
series
Nick Wood
RWE Npower Renewables Limited
nicholas.wood@rwe.com
pointOfContact
2014-01-16
MEDIN Discovery metadata standard
2.3.7
urn:ogc:def:crs:EPSG::4326
2013, RPS, Zone 8 - Bristol Channel Atlantic Array, Airborne Noise and Vibration Studies
2013-05-31
publication
AA_Airborne_noise_and_Vibration
This series contains a selection of reports and graphics detailing the airborne noise modelling surveys and monitoring proposals developed for Atlantic Array Offshore Windfarm. Included are the three relevent annexs from the Environmental Statement providing, first, a discussion of airborne noise propagation in offshore environments and the models used in the assessment of piling and operational noise for the Atlantic Array offshore wind farm project, second, calculations of the prediction of piling noise effects associated with the construction of the Atlantic Array Offshore Wind Farm for 5 and 8 MW turbine layouts and, third, calculations of the prediction of operational noise effects associated with the operation of the Atlantic Array Offshore Wind Farm for which two layouts are considered, 240 x 5 MW wind turbine generators (WTGs) and 150 x 8 MW WTGs.
In addition there is an internal RWE report on likely monitoring positions for assessing the impact of construction noise of the electrical substation and the Atlantic Array. Some of these positions were to be used as possible monitoring locations for operation noise of the Atlantic Array.
RPS Group
Technical Reviewer
dassh.enquiries@mba.ac.uk
originator
RWE Npower Renewables Limited
Offshore Windfarm Lease Round 3 Zone 8 Developers
atlanticarray@npower-renewables.com
custodian
notPlanned
Documents
Image
Engineering parameters
Man-made structures
Industrial activity
SeaDataNet P021 parameter discovery vocabulary
2009-11-16
revision
Consenting
The Crown Estate Renewable Energy Development Phases
2012-05-15
revision
1
Zone search area
The Crown Estate Renewable Energy Development Areas
2012-05-15
revision
1
Acoustic noise in the water column
SeaDataNet Parameter Discovery Vocabulary
2019-07-26
revision
113
Marine Environmental Data and Information Network
Marine Environmental Data and Information Network
otherRestrictions
Reports and conclusions are in public domain as a part of the Atlantic Array Environmental Statement. Access to datasets can be negotiated.
Access to data can be negotiated with RWE Innogy's Offshore Wind Project's team
eng
planningCadastre
structure
International Hydrographic Bureau, Limits of Oceans and Seas
1954-01-01
creation
Bristol Channel
SeaDataNet vertical extent keywords
2010-01-01
revision
atmosphere
-6.2795
-2.4241
50.1423
51.8699
2010-09-08
2013-05-31
series
Considering the propagation models suggested by the literature and the evidence, the noise assessments have been undertaken using the same parameters as ISO 9613-2 but with cylindrical spreading starting at 2000 m beyond, with atmospheric absorption coefficient (Aatm) calculated for temperature of 10 degrees and relative humidity 70percent as per ISO 9613-2 to reflect the findings of Hubbard and Shepherd (1999) and the Nord2000 method. Evidence of Low Level Jets in the UK, as regards their prevalence, height and therefore choice of 2000 m break point for cylindrical spreading is provided.
The exact type of hammer and pile are not known, however data have been sourced to best give an indication as to the source power levels. One hammer provider, Menck (1986), have provided acoustic details. These were from measurements made whilst piling in the Baltic sea in 1986.
- Details were given for a Menck MHU 2100 kNm hammer, taken to be equivalent to 2100 kJ
- Pile depth was to 60 m, as in agreement with the Atlantic Array, and
- Pile outer diameter was 2.13 m. It is noted that this is smaller than that of the Atlantic Array.
Measurements reported were taken using a Bruel and Kjaer 2260 set to Impulse timeweighting (taken to have an integration time of 35 ms). Sound Pressure Levels reported were 105 - 107 dB LAp,I at 10 - 20 m. This assessment has been based upon a source level of 106 dB LAp,I at 15 m.
It should be noted when considering these results that they are, in terms of source location, worst case and also that as activities move away from receptor locations, noise levels will fall.
https://www.marinedataexchange.co.uk/details/2627/summary
A link to the web service or dataset.
https://www.marinedataexchange.co.uk
A link to the general host site.