This document outlines the goals and approach of the HYBRID DUNES project in Barcelona, Spain. The project aims to: 1) Create a standardized database and methodology to analyze existing urban dune projects for coastal protection and ecosystem services. 2) Improve urban dune management by incorporating beach morphodynamics and ecosystem processes. 3) Define the concept of an "urban dune" and explore new governance models from an ecosystem services perspective. The project will involve collaboration with stakeholders to assess economic and social factors of urban dunes.