Águeda (Duero)

Águeda
The Águeda flows into the Douro at Barca d'Alva
Data
location	Salamanca Province , Spain Guarda District , Portugal
River system	Duero
Drain over	Duero  → Atlantic
muzzle	Duero coordinates: 41 ° 1 '43 "  N , 6 ° 55' 53"  W 41 ° 1 '43 "  N , 6 ° 55' 53"  W.
length	133 km
Catchment area	2353 km²
Medium-sized cities	Ciudad Rodrigo

The Águeda is a left tributary of the Duero and about 133 km long. Its source is near the municipality of Navasfrías in the province of Salamanca . Initially, it runs in a north-easterly direction to the city of Ciudad Rodrigo . From there it flows further north through mostly uninhabited area and finally flows into the Duero at Barca d'Alva . The last 22 kilometers the Águeda forms the border between Portugal and Spain .