Fluvial systems. Annual contribution
| Rivers and tributaries | Length (km) | Length of basin (km2) | Gauging station | 2015 | 2016 | 2017 | 2018 | 2019 |
|---|---|---|---|---|---|---|---|---|
| Muga | 65 | 854 | Castelló d'Empúries | 56.4 | 12.4 | 45.8 | 80.0 | 45.2 |
| Fluvià | 97 | 1,125 | Esponellà | : | 45.6 | 57.1 | 171.4 | 46.5 |
| Ter | 208 | 3,010 | Masies de Roda | 270.6 | 390.1 | 289.8 | 757.4 | 222.2 |
| Ridaura | 22 | 71 | Sta. Cristina d'Aro | 2.5 | 2.5 | 2.4 | 3.1 | 1.0 |
| Tordera | 54 | 894 | Sant Celoni | 6.0 | 6.4 | 13.0 | 23.1 | 9.6 |
| Besòs | 58 | 1,039 | Sta. Coloma de Gramenet | 83.5 | 80.5 | 92.0 | 168.2 | 105.5 |
| Congost | 41 | 223 | la Garriga | 4.8 | 5.7 | 10.0 | 25.4 | 9.0 |
| Llobregat | 170 | 4,948 | Castellbell i el Vilar | 243.7 | 266.4 | 303.8 | 797.7 | 299.2 |
| Cardener | 90 | 1,373 | Súria | 79.3 | 79.6 | 89.6 | 247.6 | 81.0 |
| Anoia | 80 | 465 | St. Sadurní d'Anoia | 22.0 | 20.8 | 26.3 | 61.6 | 33.1 |
| Foix | 49 | 312 | Castellet de Foix | 4.6 | 5.2 | 2.4 | 24.7 | 4.0 |
| Gaià | 66 | 423 | Vilabella | : | : | 2.9 | 10.5 | 5.3 |
| Francolí | 85 | 838 | Tarragona | : | 10.7 | 14.2 | 43.4 | 32.4 |
| Siurana | 59 | 295 | Cornudella de Montsant | 5.6 | 5.8 | 6.1 | 4.8 | 5.6 |
| Units: Cubic hectometres. | ||||||||
| Source: Agència Catalana de l'Aigua. | ||||||||
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