The reservation by areas is as follows:
- Eastern Cantabrian is at 93.2%
- Western Cantabrian at 78.4%
- 81.3% Miño-Sil
- Galicia Costa at 79.4%
- Internal basins of the Basque Country at 90.5%
- Duero at 76.7%
- Slash at 57.0%
- Guadiana 41.4%
- Red, Odiel and Piedras at 79.5%
- Guadalete-Barbate at 51.0%
- Guadalquivir at 47.7%
- 54.3% Andalusian Mediterranean Basin
- Safe at 41.8%
- Jucar at 52.1%
- Ebro at 83.2%
- Inland basins of Catalonia at 93.2%
The precipitations have been abundant in the Mediterranean slope and little in the Atlantic slope. The maximum was produced in Murcia with 90.6 mm (90.6 l / m²).
The situation of the basins, in cubic hectometers, is detailed in the attached table:
