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Reservoirs. Volume of water

Reservoirs. Volume of water Catalonia. 2023
Rivers and tributaries Reservoir Capacity (hm³) Size of basin (km²) Volume of water (hm³)
Internal basins
Muga Boadella 61 182 9.8
Ter Sau 165 1,564 28.1
Susqueda 233 1,850 53.6
Llobregat la Baells 109 532 30.2
Cardener Sant Ponç 24 318 6.6
Llosa del Cavall 80 200 17.4
Foix Foix 4 290 2.0
Gaià Catllar 59 370 0.4
Riudecanyes Riudecanyes 3 31 0.2
Siurana Siurana 12 60 0.5
Ebre basin
Segre Oliana 101 2,675 23.6
Rialb 404 3,320 71.4
Sant Llorenç de Montgai 10 .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available
Noguera Pallaresa Estany Tort .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available
Estany Saburó 11 2 .. Confidential data, low reliability or not available
Estany Mar 14 .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available
Certescans 16 .. Confidential data, low reliability or not available 6.7
Tremp/Talarn 227 2,070 79.9
Terradets 33 2,620 31.8
Camarasa 163 2,850 70.3
Capdella 50 .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available
Llacs Espot 10 29 .. Confidential data, low reliability or not available
Val d'Aran .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available
Noguera Ribagorçana Baserca 22 .. Confidential data, low reliability or not available 15.5
Llauset 17 .. Confidential data, low reliability or not available 8.2
Cavallers 16 26 0.4
Escales 152 731 48.1
Canelles 679 1,628 84.9
Santa Anna 237 1,757 118.5
Baix Ebre Flix .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available .. Confidential data, low reliability or not available
Guiamets 10 75 0.9
Riba-roja 210 79,177 201.6
Source: Agència Catalana de l'Aigua (Internal basins); Confederación Hidrográfica del Ebro (Ebre basin).
Note: Water in reservoir in the first week of October of each year.
(..) Confidential data, low reliability or not available.

Last update: September 6, 2024.

Methodological note

Definition of concepts

Hydrographical basin
Set of slopes that incline towards a single flow of water.
Reservoir
Large artificial lake that is formed by interrupting the flow of a river or by creating a lake by means of a large dam.

Methodological aspects

The Catalan Water Agency (ACA) manages and plans the water cycle, with a vision of integrated water systems, taking into account the balance of all ecosystems. Water becomes a basic structural and functional element to the environment and life. This management must be compatible with the growing demand for permanence, universality and immediacy of the citizens of an advanced society, and ensure quality and good service.

The hydrology section includes fluvial systems. The fluvial systems are distributed by basins. The data refers to the volume of water contributed by rivers at different observation points (gauging stations). As for reservoirs, the volume of water stored per season is recorded. Series tables complement the information to enable comparability.

When the value is lower than that of the minimum unit to be able to estimate the statistical operation or if it effects statistical confidentiality, the symbol used is "..".