Collecting data from various sources about eel populations is the first step towards the estimation of eel escapment to the sea. All data received have been collated in the SUDOANG database, whose structure is inherited from the database for eels (DBEEL), developed during the POSE project, which estimated potential and actual escapement of silver eel

This deliverable presents the data import routines about physical obstacles and hydropower plants in France, Spain and Portugal. First we describe the import of physical obstacles data from France, then we describe the import of physical obstacles data from Spain and Portugal. Thirdly, we describe the import of data concerning hydroelectric power plants for the three countries. Finally, the process for calculating the cumulated number of obstacles in each river segment of the SUDOANG hydrographic network is described for later use in the silver eel biomass estimation model (EDA model).