Afon Tryweryn
River
Memorial chapel to the drowned village of Capel Celyn
Country	Wales
Landmarks	Canolfan Tryweryn, Llyn Celyn dam
Source	Llyn Tryweryn
Mouth
- location	confluence with Dee
Length	19 km (12 mi)

The Tryweryn is a river in North Wales. Canolfan Tryweryn ( is the National White Water Centre for Wales and is based near Bala in North Wales Llyn Celyn is a large Reservoir constructed between 1960 and 1965 in the valley of the River Tryweryn in North Wales. The River Dee ( Welsh: Afon Dyfrdwy) is a 70-mile-long (110 km River. The kilometre ( American spelling: kilometer) symbol km is a unit of Length in the Metric system, equal to one thousand A mile is a unit of Length, usually used to measure Distance, in a number of different systems including Imperial units United States "Riverine" redirects here For the use of that term in Maritime geography, see there North Wales (Gogledd Cymru is the northernmost unofficial region of Wales, bordered to the south by Mid Wales and to the east by England.

It starts from Llyn Tryweryn in the Snowdonia National Park and after 19 km joins the river Dee at Bala. Snowdonia (Eryri is a region of North Wales and a National park of in area The River Dee ( Welsh: Afon Dyfrdwy) is a 70-mile-long (110 km River. Bala (more correctly Y Bala) is a Market town in Gwynedd, North Wales, and formerly an Urban district of the old County It is one of the main tributaries of the Dee and has been dammed to form Llyn Celyn. A tributary is a Stream or River which flows into a mainstem (or parent river A dam is a barrier that divides waters. Dams generally serve the primary purpose of retaining water while other structures such as Floodgates, Levees Llyn Celyn is a large Reservoir constructed between 1960 and 1965 in the valley of the River Tryweryn in North Wales. Water is stored in winter when flows are high, and released over the summer to maintain the flow in the Dee (water from the Dee is used as the water supply for large areas of north-east Wales and for the Wirral and much of Liverpool). Wirral or the Wirral (ˈwɪrəl is a Peninsula in the north west of England. Liverpool ( is a City and Metropolitan borough of Merseyside, England along the eastern side of the Mersey Estuary

Whitewater Sports

Main article: Canolfan Tryweryn

The Tryweryn is the site of the Welsh Canolfan Tryweryn national whitewater centre, managed by the Welsh Canoe Association. Canolfan Tryweryn ( is the National White Water Centre for Wales and is based near Bala in North Wales Canolfan Tryweryn ( is the National White Water Centre for Wales and is based near Bala in North Wales Whitewater is formed in a Rapid, when a River 's gradient drops enough to disturb its Laminar flow and create Turbulence, i The misleadingly titled Welsh Canoeing Association (WCA is the governing body for canoeing and Kayaking in Wales. It is an important river for whitewater kayaking and rafting. Whitewater kayaking is the sport of paddling a Kayak on a moving body of water typically a Whitewater river Rafting or whitewater rafting is a challenging recreational activity utilizing a Raft to navigate a River or other bodies of water The centre features a Café and superb facilities to support whitewater sports. Whitewater is formed in a Rapid, when a River 's gradient drops enough to disturb its Laminar flow and create Turbulence, i The natural whitewater rapids have been modified (by placing boulders along the river bed) to make them safer and to build playspots. Whitewater is formed in a Rapid, when a River 's gradient drops enough to disturb its Laminar flow and create Turbulence, i Playboating is a discipline of whitewater Kayaking or Canoeing where the paddler performs various technical moves in one place (a playspot as opposed to downriver The river is usually considered to be Grade III. The International Scale of River Difficulty is a standardized scale used to rate the safety of a stretch of river or a single Rapid. Usually between 9 and 12 m³/s are released from the Llyn Celyn dam.

The regular releases from Llyn Celyn in summer mean that kayak events and trips can be planned in advance, and commercial rafting can take place (most whitewater rivers in Wales rely on recent rain to have enough water for kayaking or rafting). There are problems with recreational access to many of the other rivers in Wales, and so rafting and kayaking is not always possible (see Rivers Access Campaign for more information). The Rivers Access Campaign is being undertaken by the British Canoe Union (BCU to open up the inland water-ways in England and Wales on behalf of members

Slightly down river from the centre is the Tyn Cornel campsite.

Afon Tryweryn rafters hitting the standing wave of a hydraulic jump. A hydraulic jump is a phenomenon in the science of Hydraulics which is frequently observed in open channel flow such as Rivers and Spillways.

Coordinates: 52°55′N 3°35′W / 52.917, -3.583