This document is Deliverable D3.2 – Modelling Approach Map of the Horizon Europe project SpongeScapes. It outlines the modelling approach adopted to assess sponge functioning in European landscapes, including a typology of models, responsibilities across demonstration sites, and principles for harmonisation. The deliverable supports site-specific analysis and fosters comparability across the project’s case studies. Disclaimer: This deliverable has been submitted as part of the Horizon Europe project SpongeScapes (Grant Agreement No. 101112738), but has not yet been reviewed or accepted by the European Commission. It is shared here for early dissemination purposes due to the relevance of its content to external stakeholders and related initiatives.