Water underpins every aspect of life, from healthy ecosystems to economic prosperity and human well-being. People, ecosystems, and all living species depend on it for survival. As climate change intensifies droughts, floods, and water quality degradation, ensuring water resilience has become an urgent priority. The recently adopted EU Water Resilience Strategy (2025) responds to this challenge setting out an ambitious agenda to ensure Europe’s water systems can withstand growing climate-induced pressures, water reuse and preserving ecosystems while supporting human well-being and enabling water-smart economy. It calls for integrated water governance, and systemic and innovative solutions to reduce vulnerabilities, and build adaptive capacity across all sectors. Nature-Based Solutions (NbS) offer transformative means to achieve these objectives. By restoring ecosystems, enhancing natural water retention, and reinforcing the connectivity between terrestrial and aquatic systems, NbS help maintaining hydrological balance while delivering multi-faceted ecosystems services and biodiversity gains. Mainstreaming NbS requires bridging the gap between strategy design and implementation, through replicating and scaling up successful models, aligning policies and financing instruments while fostering participatory governance to ensure solutions are ecologically effective and socially acceptable. This session invites participants to explore how mainstreaming NbS can translate the EU Strategy into action by closing the implementation gap and advancing integrated water management frameworks that align governance, financing, and innovation under a shared ambition: achieving water resilience. Contributions are welcome from real-world NbS case studies, methodological approaches and tools for co-design and stakeholder engagement in water management planning and implementation. In particular, we seek insights into how NbS are valued and implemented as alternative and/or complementary investments to grey infrastructure, and which methods are agile, whilst robust, to undertake such comparative evaluations. Submissions demonstrating innovation and practical applications, monitoring and evaluation strategies, and measurable outcomes showcasing NbS co-benefits would be highly valued, ensuring that the discussion bridges scientific evidence with real-world impact to enhance water availability and quality, reduce disaster risk, while strengthening socio-ecological resilience.