How much of the Douro River is navigable?
How much of the Douro River is navigable? Currently, after the building of various dams, the river is navigable, smoothly and calmly, for 210 km, between Oporto and Barca d´Alva.
Does the Douro River ever dry up?
Young winemakers look at the river and think they can suck a bit of water out of it and there will be plenty behind it, but it's a series of lakes and it doesn't replenish. Last September the source of the Douro in Spain dried up for the first time.