Monitoring seabed mobility at Formosa2 Wind Farm
Brosols supports TOWSC and Føn Energy Services with the annual high-resolution MBES survey of the Formosa 2 Offshore Wind Farm.
Installed in 2022, the farm consists of 47 wind turbine generators (WTGs), ~30 km of export cables, and ~70 km of inter-array cables. Regular MBES surveys provide essential insights into seabed mobility, enabling proactive maintenance and safeguarding of critical assets.
Survey objectives:
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Identify and assess (potential) new and existing cable exposures;
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Report cable touchdown points and scouring along cable routes and around WTG jacket structures;
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Identify debris and seabed features within the wind farm limits;
Approach
A locally chartered vessel from Waipu Fishing Port was mobilized, ensuring efficient access to the site and maximum use of weather windows. Brosols deployed theThe Norbit Winghead i80s MBES was deployed on a side pole mount, with Brosols providing technical expertise, securing acquisition of ultra-high-resolution data. Careful planning around tides and currents further optimized data quality.
Key deliverables
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Bathymetric charts, MBES geotiffs, backscatter mosaics, and a GIS project
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Identification and assessment of potential cable exposures and free spans
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Comparative analysis of yearly datasets to reveal seabed mobility trends
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Scour monitoring methodology developed for WTG jackets
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Separate MBES report on 500×500m areas around jackets scheduled for near-term maintenance
Example of high-resolution MBES
Outcome
The comprehensive reporting provided Formosa 2 shareholders with actionable intelligence on asset condition and seabed evolution. By combining technical precision with clear data presentation, Brosols has become a trusted partner in the ongoing monitoring of this flagship offshore wind farm.
“Brosols provides clear insights,
dependable results, and trusted outcomes
year after year”
- MATTHEW TU
Tender Manager TOWSC