River Rhiw


The River Rhiw is a short river in the north of Powys in Wales. Two headwater tributaries both named Afon Rhiw flow east to join at Dwyrhiew and then continue in a generally easterly direction to join the River Severn east of Berriew. The northern Rhiw emerges from Llyn y Bugail on Mynydd Waun Fawr whilst the southern Rhiw rises near Mynydd Dwyriw. The combined river flows past the hamlets of New Mills, Manafon and Pant-y-ffridd, accompanied by the B4390 road all the way to Berriew. Other tributaries include the Nant Wtre-wen, Crygnant, Nant y Llyn Mawr and Dolgar Brook. It is bridged and forded at numerous points, one of which is an aqueduct carrying the Montgomery Canal over it at Berriew. At the eastern end of the river is Glansevern Hall and gardens.

Etymology

The Welsh word rhiw means 'slope' in which case it would be 'slope river' but it is suggested that it may be derived from a British word riu meaning stream. The modern anglicised name Berriew is derived from Aberriw