The basis of basins 1: 50000 is a project carried out by joint order of the Ministry of the Environment (DMA) and the Catalan Water Agency (ACA). The aim of this project is to obtain digital databases and GIS network watershed of Catalonia for scales 1: 50000. It starts from the Terrain Elevation Model (DEM) of Catalonia 15x15 meters generated by interpolation from the altimetric information gathered with the Topographic Map 1: 5000 Catalonia With the new version 1. Elevation Model extracted from the base 1 : 5000 v2 will have a more favorable hydrological behavior, but at the time of starting the generation of watershed only one part of the territory. In this version only shows the basins corresponding to the area of basins of Catalonia.

Wastewater treatment plant: Installation intended to reduce the pollutant load that exists in wastewater before it is discharged to the receiving environment.

The Catalan Water Agency, as Basin Organization, has a Water Register comprises 3 sections (A, B, C) has a computer data structure and a book of entries (tokens enrollment). It officially enroll concessions waters, changes in ownership or changes to the characteristics of concessions, contracts of sale, the legalization of exploitation at a flow rate of 7,000 m3 / year and the uses of private waters (transitional provisions of the Water Act). Since the Water Register is public, and registration is the means of proof of the existence and location of the concession, anyone can apply for certification on the rights of registered water use to the Catalan Water Agency. Rights holders of registered water harvesting enjoy administrative protection.

Information regarding an area exposed to an avalanche. Mapped based on analysis of the terrain and of signs that avalanches leave in their path, mainly, in forests. In Avalanche Zones, avalanches occur frequently and are of different sizes. Avalanche Zones have been systematically mapped throughout the region. They are shown in orange. There are two types of Avalanche Zones: zones where avalanches usually follow the same path, shown in orange, and zones where avalanches usually follow different paths, shown in pale orange.

Inventory of defence structures built to reduce the risk of avalanches. Single and lineal structures are documented, such as artificial avalanche release systems, road barriers, breakers, deflection structures, retention nets, screens, wind baffles, deflectors, rigid and flexible barriers, retention walls, reforestation and controlled areas.