The planning of offshore wind energy areas is driven by multiple drivers, that are often induced as well by planning cultures, priorities and behaviours. For this purpose, Blue-Paths developed a multi-tier planning approach towards site prioritization on the 19 areas of the Spanish MSP. This included:
• Co-existence: Allocation of offshore wind energy follow recital 8 of the EU MSP Directive (2014/89/EU) and the methodological approach of the Spanish Maritime Spatial Plan by promoting co-existence among different uses of the sea.
• Socio-Ecological: Allocation of offshore wind energy should be defined in areas where ecological and social costs are minimized, this includes distance from coast to avoid visual impacts and in sea areas where cumulative risks to habitats, birds, marine mammals and fish are minimized.
• Spatial-Efficiency: Allocation of offshore wind energy should be developed in areas where interactions and conflicts (recital 19; 2014/89/EU) with other uses of the sea are minimized: nature protection, commercial fishery, shipping, cabling, military areas and coastal tourism.
• Energy Equity: Allocation of offshore wind energy follow distributional equity principle by considering fair distribution of benefits and burdens to coastal communities, taking into account economic and social disadvantaged coastal regions/provinces, just transition towards low-carbon energy systems and sharing of burden with energetically “privileged” provinces.
• Technical/ Technological: Offshore wind energy should be allocated in sea areas where technical/technological feasibility is maximized, where potentials for multi-use combinations with OWE infrastructure are maximized (with aquaculture and solar energy), weather conditions do not harm infrastructure and where capacity of energy production can be maximized.
The characteristics of the framework provide promising approaches for future decision-making in MSP, especially what concerns offshore wind energy and potential future potential of ocean-multi (e.g. offshore wind + aquaculture), because it ensures a more robust and reliable decision-making process.
The implementation of the study included the development of a database of 39 criteria and their preparation for analysis. The Ensemble Multi-Criteria Decision Analysis (EnseMCDA) approach incorporates three distinct multi-criteria methodologies: TOPSIS, MMOORA, and VIKOR. Each of these techniques was executed using a set of 10,000 unique weights for each criterion (39 criteria x 10,000 weights = 390,000 weights). These weights were derived through a Monte Carlo simulation process. Consequently, a total of 30,000 rankings (ranging from 1 to 19, as the number of potential areas for OWE development in Spain) were generated, with each methodology contributing 10,000 ranks. These rankings were then consolidated and presented in the form of priority ranks and optimal priority rankings. This comprehensive approach ensures a robust and reliable decision-making process.
Figure 1 describes the priority ranking for offshore wind site selection according to three different planning tiers in four planning subdivisions (LEBA-Levatine-Balearic; NOR-North Atlantic, ESAL-Estrecho-Alboran and CAN-Canary Islands).
Machine Learning Technique based on Random Forest was applied for the identification of trade-offs using a C-MSE – cumulative means standard error and the MSE for single criteria.
Figure 2 below illustrates the methodological approach/framework applied in Blue-Paths for the case study on offshore wind energy.
Blue-Paths produced in total 25 OUTPUTS. There are 14 TECHNICAL OUTPUTS in Blue-Paths:
Scientific manuscripts: Two scientific manuscripts were submitted. One manuscript planned as policy brief in an open letter format with key findings to be submitted to Open Research Europe.
1. Depellegrin et al., 2024. More robust offshore wind energy planning through model ensembling. Nature NPJ (Submitted: May 2024; R1: minor revision; R2: under review). Submission ID: 07023eef-4c15-4d2a-bfb9-0de2021a8947. (Type: Research Article). (ACCPETED)
2. Depellegrin et al., 2024. Making Maritime Spatial Planning transition-based. Nature NPJ (Submitted July 2024; R1: under review). Submission ID: 07023eef-4c15-4d2a-bfb9-0de2021a8947. (Type: Perspective). (UNDER REVIEW in 09/2024)
3. Depellegrin D., et al., 2024. Integrating Sustainability Transition into Maritime Spatial Planning and the Blue Economy. Open Research Europe. (IN PREPARATION).
Conferences, workshops, seminars: Blue-Paths has been presented at 4 topical international workshops/conferences, and 4 knowledge transfer seminars (10 to 14) and 1 seminar for local stakeholders (14).
International conferences/workshops:
4. Depellegrin D., 2024. The Blue-Paths Project. Stift. Lerici/ Teknocene: building resilience and adaptation in the face of global challenges. Funded by the Lerici Foundation (Proj no.: 33409). KTH Stockholm (Sweden), 13-17/05/2024.
5. Depellegrin D., Ambrosino M., Martí Llambrich, C., 2023. “Ensemble” Multi-criteria techniques for more robust offshore wind energy planning. PLASMAR Project (Setting the bases for Sustainable Maritime Spatial Planning in Macaronesia) Final Conference (European Regional Development Fund through the Operational Programme of Territorial Cooperation Madeira-Azores-Canary Islands (POMAC 2014-2020). Gran Canaria (Spain), 12th December 2023.
6. Depellegrin D., Ambrosino M., Roy S., Martí Llambrich, 2023. Geospatial Techniques for more robust Ocean Planning. Invited expert at the Horizon Europe MarineWind Project Brussels (Belgium) 23/11/2023.
7. Depellegrin D, Ambrosino, M., Roy S., Anbleyth-Evans J., García Sanabria J., Larosa F., Martí Llambrich C., 2023. Disentangling the landscape of offshore wind energy arrays of the first Spanish Maritime Spatial. ICES 2023 Annual Science Conference, Bilbao (Spain) 11-14 September 2023.
Knowledge transfer seminars:
8. Depellegrin D., and Marti Llambrich, C., 2023. Knowledge transfer in techniques & methods in Ocean Planning. GeoXarxa Seminar of the Department of Geography, University of Girona.
9. Depellegrin D., 2023. Experiences in Ocean Planning across European Seas. IH-Foundation IHCantabria Instituto de Hidraulica Ambiental de Cantabria, Santander (Spain), 20/10/2023.
10. Depellegrin D., Ambrosino M., Roy S., Martí Llambrich, C., 2023. “Ensemble” Multi-criteria techniques for more robust offshore wind energy planning. Mediterranean Community of Practice Second MED-MSP-Community of Practice Webinar MSP AND OFFSHORE WIND ENERGY Monday 13th November 2023 11:00 – 12:15 CET. Web:
https://maritime-spatial-planning.ec.europa.eu/media/document/15027(öffnet in neuem Fenster).
11. Depellegrin D., Roy S., Anbleyth-Evans J., Martí Llambrich C., 2023. Ocean Multi-Use as a pathway for sustainable transition in the Blue Economy. MSP Research Network (MSPRN) Webinar: 12th April 2023: MSP Futures: Beyond Single Use Zoning?
Seminar to local stakeholders:
12. Depellegrin D., 2024. Addressing the Interactions among Humans and the Marine Environment. Seminari sobre l’eòlica marina a la Costa Brava, Girona (Spain), 08/03/2024.
Blue-Paths Case Studies
13. EU MSP-Platform, 2024. The Blue-Paths Project:
https://maritime-spatial-planning.ec.europa.eu/projects/addressing-sustainability-transition-pathways-blue-economy(öffnet in neuem Fenster) 14. EMODNET, 2023. Use case on Blue-Paths. Web:
https://emodnet.ec.europa.eu/en/use-case/characterization-potential-spanish-offshore-wind-energy-landscape-through-emodnet-data(öffnet in neuem Fenster)