Quinta do Rio Dão

The river Dão sources in Portugal and runs for about 100 kilometres before emptying into the Mondego River, very near to Santa Comba Dão and Quinta do Rio Dão (about 6 km). Its granite-sloped valley is situated in the "Região Demarcada do Dão", where the famous Dão wines are produced.
In 1981 the Aguieira dam was constructed in the Mondego river, just a few kilometres beyond the point where the river Dão empties into the Mondego, creating the artificial lake of Aguieira. The river Dão near Quinta do Rio Dão becomes a part of this lake. Its water level is not constant, depending on the annual rainfall and the use of water for irrigation, flood control and electrical power production, but normally it is at its highest from March until the end of July. Then the water level slowly drops until reaching its winter level.

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