Afon Twrch

The Afon Twrch is a river which rises in the Black Mountain in south Wales. It forms the boundary between the counties of Powys (former county of Brecknockshire) and Carmarthenshire and, downstream of Ystradowen, between Powys and Neath Port Talbot county borough. NameThe name derives from Welsh afon / 'river' and twrch / 'boar'. In common with other rivers sharing the same name, it is believed to refer to the burrowing or snouting action of the waters of the river. The river has also been associated with the legend of Twrch Trwyth. GeographyThe headwaters arise on the southern slopes of Bannau Sir Gaer (Carmarthen Fans) and Fan Brycheiniog and are soon joined by the waters of the Twrch Fechan. The river flows south-west and then south and finally south-east for about 14 km / 9 miles to its confluence with the River Tawe at Ystalyfera. Significant tributaries include the Nant Gwys and the Nant Llynfell.

The Afon Twrch is a river which rises in the Black Mountain in south Wales. It forms the boundary between the counties of Powys (former county of Brecknockshire) and Carmarthenshire and, downstream of Ystradowen, between Powys and Neath Port Talbot county borough. NameThe name derives from Welsh afon / 'river' and twrch / 'boar'. In common with other rivers sharing the same name, it is believed to refer to the burrowing or snouting action of the waters of the river. The river has also been associated with the legend of Twrch Trwyth. GeographyThe headwaters arise on the southern slopes of Bannau Sir Gaer (Carmarthen Fans) and Fan Brycheiniog and are soon joined by the waters of the Twrch Fechan. The river flows south-west and then south and finally south-east for about 14 km / 9 miles to its confluence with the River Tawe at Ystalyfera. Significant tributaries include the Nant Gwys and the Nant Llynfell.