Sadar (river)

The Sadar River is a tributary of the Elorz River, which rises in the Aranguren and Tajonar mountain ranges, running in a westerly direction, between the Eocene marls of the Cuenca de Pamplona. It is 19 km long and drains a basin of some 70 km2. The average rainfall it receives, 700 mm, gives it an estimated annual flow of 12 hm³. The Zolina reservoir, a former artificial leachate deposit from the disappeared potash mines, belongs to the Sadar basin, although, due to the concentration of salts, its waters and sludge are kept confined within its containment dike. Although of artificial origin, the reservoir is being colonised by species typical of halophilic environments, which make it of environmental interest. The Góngora Waste Treatment Centre also belongs to the Sadar basin. In this case, its waters have been channelled and are taken directly to the Arazuri treatment plant. The Sadar is a small river, with a low flow, which is very well embedded in the terrain and hardly presents any flooding problems. Its course, including its banks, has an average width of some 6–8 metres. In Pamplona, where it runs for approximately 3.7 km, it crosses the campuses of the Public University of Navarre and the University of Navarre and flows into the River Elorz.

Flows through: Spain.

River data from Wikidata (CC0); lengths normalised to a common unit.