Damming of The Towy
About 10 km (6.2 mi) from its source, the swift flow of the Towy is interrupted by the Llyn Brianne reservoir, created here in 1972 by damming a section of the river to store winter rain for release into the river during dry periods. The reservoir supports the new abstraction at Nantgaredig which supplies a large swathe of south-east Wales with drinking water. The flow in the River Towy would have been unable to sustain such an abstraction were it not for the release of water from the upland reservoir.
Read more about this topic: River Towy