Trévadine Reservoir

Trévadine Reservoir (Réservoir de Trévadine, Retenue de Trévadine) is a reservoir in the Haute-Corse department of France, on the island of Corsica. It stores water for drinking and irrigation, which is fed to reservoirs in the coastal plain.

Dam
The Trévadine Reservoir is in the commune of Ghisoni. The dam impounds the Fiumorbo river below the Sampolo Reservoir and the Défilé de l'Inzecca. The D344 road passes its northeast shore. The dam is owned and operated by Électricité de France (EDF), and came into service in 1991. The gravity dam is 17 m high and 145 m long, with a crest elevation of 153 m. It impounds 247000 m3 of water. The reservoir covers 5 ha. It is fed from a drainage basin of 135 km2.

The 44 MW Trévadine hydroelectric plant, which receives water from the Sampolo Reservoir, discharges into the south of the Trévadine Reservoir. The plant and the downstream water reservoir have been the main economic driver for the village of Lugo-di-Nazza to the south.

Operations
The reservoir supplies water to the reservoirs in the plain: the 2350000 m3 Bacciana Reservoir, the 4300000 m3 Teppe Rosse Reservoir and the 5500000 m3 Alzitone Reservoir. The reservoirs in turn deliver water using gravity.

In winter an outlet in the Trévadine Reservoir supplies an 800 mm above-ground steel pipe that runs for a distance of 7.5 km to the reservoirs of Alzitone, Teppe Rosse and Bacciana. It is able to carry about 0.9 m3 per second. Downstream a network of distribution pipes carries water to users in the municipalities of Prunelli-di-Fiumorbo, Serra-di-Fiumorbo, Ventiseri and Solaro.

About 900 L/s of water is taken from the Fium'Orbu in winter with occasional peaks of as much as 1200 L/s. In summer the Fium'Orbu continue to supply 250 to 400 L/s to the reservoirs, but delivery of water to users requires operation of pumping stations.

Ecology
The reservoir has low biological significance. Flora include Montpellier cistus (Cistus monspeliensis), yellow flatsedge (Cyperus flavescens), wild carrot (Daucus carota), yellow fleabane (Dittrichia viscosa), black poplar (Populus nigra) and rough cocklebur (Xanthium strumarium).