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Effective environmental policy development requires more than scientific evidence. It depends on the active involvement of stakeholders, institutions and land managers who operate within real governance and territorial contexts.
Natural/Small Water Retention Measures (NSWRM) are particularly dependent on stakeholder engagement because their success relies on local knowledge, land management decisions and cross-sector coordination.
Within OPTAIN, stakeholder engagement was not treated as a communication exercise, but as a structured component of the analytical process. Through stakeholder mapping and Multi-Actor Reference Groups (MARG), the project integrated perspectives from:
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Water authorities
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Agricultural administrations
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Farmers and land managers
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Regional planners
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Advisory services and researchers
This participatory approach strengthened the relevance and interpretability of modelling results and optimisation analyses.
Importantly, OPTAIN does not advocate for specific regulatory reforms. Instead, it facilitates informed dialogue by providing transparent modelling outputs, harmonised indicators and structured scenario exploration. Stakeholder engagement supports understanding of trade-offs between environmental performance, economic feasibility and governance constraints.
By combining:
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Scientific modelling (catchment and field scale)
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Optimisation protocols
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Socio-economic assessment
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Structured stakeholder dialogue
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Knowledge transfer and training activities
the project demonstrates how collaborative processes enhance the credibility and policy relevance of NSWRM assessment.
Stakeholder engagement therefore plays a dual role:
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Strengthening the analytical robustness of scenario evaluation.
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Supporting policy dialogue and mutual understanding across sectors.
This section explores how participatory governance, capacity building and knowledge exchange contribute to more coherent and inclusive decision-making pathways for NSWRM across Europe.