Dão River

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Dão river
Santa Comba Dao 9-250608.jpg
Native nameRio Dão
Physical characteristics
Source Eirado
  location Aguiar da Beira
  coordinates40°47'09.4"N 7°29'52.2"W
  elevation750 m
Mouth Mondego River
Foz do Dão, Santa Comba Dão
40°20'27.4"N 8°10'51.2"W
110 - 124,7 m
Basin size1377 km2
Basin features
  leftCarapito stream
  rightCoja stream, Sátão River, Criz River

Dão (Portuguese pronunciation:  [dɐ̃w̃] ) is a Portuguese river that originates in the plateau regions of Trancoso-Aguiar da Beira in the Eirado parish, Aguiar da Beira Municipality, Guarda District, and varies between 714 and 757 metres (2,343 and 2,484 ft) in elevation.

It flows in a general northeastsouthwest direction, passing through Barragem de Fagilde and crosses or demarcates the limits of the councils of Aguiar da Beira, Penalva do Castelo, Mangualde, Viseu, Carregal do Sal, Nelas, Tondela, and Santa Comba Dão. It empties into the Mondego River, in the limits of the councils of Santa Comba Dão, Mortágua, and Penacova, after covering about 100 kilometres (62 mi).

Its granite-sloped valley is situated in the "Região Demarcada do Dão", where the Vinho do Dão wines are produced.

Low water level in Dao river River Dao near Santa Comba Dao.jpg
Low water level in Dão river
Dao River at Santa Comba Dao SCD - rio Dao -311007.jpg
Dão River at Santa Comba Dão

Rio Dao OSM.jpg

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