The report presents the database structure and data collection process for developing modelling tools for urban water runoff (UWR) management component of the WATERUN project. The database was designed to store the spatial and time series datasets required to build and validate UWR models developed for Amman, Santiago de Compostela, and Aarhus. A data requirement list was used to ensure that the necessary datasets were obtained from project collaborators, and a folder-based database system was chosen for its simplicity and ease of use and storage.