The River Dwyryd (in Welsh Afon Dwyryd) is a river in Gwynedd, North Wales, which flows principally westwards draining to the sea into Tremadog Bay south of Porthmadog. Welsh ( cy Cymraeg or cy y Gymraeg, kəmˈrɑːɨɡ and {{IPA|[ə ɡəmˈrɑːɨɡ]}}, is a member of the Brythonic branch of Celtic "Riverine" redirects here For the use of that term in Maritime geography, see there History Gwynedd was an independent kingdom from the end of the Roman period until the 13th Century when it was conquered and subjugated by England North Wales (Gogledd Cymru is the northernmost unofficial region of Wales, bordered to the south by Mid Wales and to the east by England. Tremadog Bay is an inlet of Cardigan Bay, defined by the north Cambrian Coast and the Llŷn peninsula of north Wales. Porthmadog, ˌpɒrθˈmædɒg and known locally as Port, is a small Coastal Town in the Dwyfor locality within Gwynedd in North

The River Dwyryd at Maentwrog

The Dwyryd rises in the hills to the north of Ffestiniog. Ffestiniog is a community in Gwynedd, Wales, containing several villages in particular the settlements of Llan Ffestiniog and Blaenau Ffestiniog At its most northern extent, water draining from Moelwyn Mawr drains into the Tanygrisiau Reservoir, the outflow of which forms the source of the Afon Goedol. |} Moelwyn Mawr is a Mountain in Snowdonia, North Wales and forms part of the Moelwynion. This is joined by the Afon Bowydd at grid reference: SH695438. The British national grid reference system is a system of geographic grid references commonly used in Great Britain, different from using Latitude and Longitude Below Rhyd y Sarn, the river is joined by the Afon Cynfal which flows from the east down a deep wooded gorge which includes the spectacular Rhaeadr Cynfal (Cynfal waterfall) south of Ffestiniog. For the song see CANYONMID. For the band see Canyon (band. A canyon (rarely cañon) or gorge A waterfall is usually a geological formation resulting from water often in the form of a Stream, flowing over an Erosion -resistant rock Ffestiniog is a community in Gwynedd, Wales, containing several villages in particular the settlements of Llan Ffestiniog and Blaenau Ffestiniog The main river from here on flows through a wide valley formed by glaciation but with a broad flat base formed from re-worked glacial moraines and riverine gravel deposits. "Glacial" and "Glaciation" redirect here For the geological periods see Glacial period. Moraine refers to any glacially formed accumulation of unconsolidated glacial debris (soil and rock which can occur in currently glaciated and formerly glaciated regions such as those The valley, the Vale of Ffestiniog, is worked for agriculture but is subject to routine winter flooding. Agriculture refers to the production of goods through the growing of plants and fungi and the raising of domesticated Animals The study of agriculture A flood is an overflow of an expanse of water that submerges land a deluge

Afon Tafarn-Helyg has its confluence about one mile further downstream. Confluence, in Geography, describes the meeting of two or more Bodies of water. This tributary rises south of Gellilydan just north of the Trawsfynydd reservoir but does not receive any water from the reservoir. A tributary is a Stream or River which flows into a mainstem (or parent river Trawsfynydd ( Welsh: "across mountain") is a Village in North Wales, adjacent to the A470 north of Dolgellau A reservoir is most broadly a place or hollow vessel where Fluid is kept in Reserve, for later use

There are a number of small lakes and reservoirs in the woodlands north of Plas Tan y Bwlch which also drain south into the river. A lake (from Latin lacus) is a Terrain feature (or Physical feature) a body of Liquid on the surface of a world that is localized to the Ecologically a woodland is an area covered in trees differentiated from a Forest. Plas Tan y Bwlch ( in Gwynedd, Wales is the Snowdonia National Park Environmental studies centre administered by the National Park These lakes include Llyn y Garnedd, Llyn Hafod y Llyn and the beautiful Llyn Mair. Llyn Mair ( Welsh: 'Mary's lake' is a 14 acre artificial Lake located at in North Wales.

Trawsfynydd reservoir, a large impoundment close to the A470, is the only inland water in the UK that has been used as a source of cooling water for a nuclear power station. Trawsfynydd ( Welsh: "across mountain") is a Village in North Wales, adjacent to the A470 north of Dolgellau The A470 is a major long-distance connective spine road in Wales, running from Cardiff on the south coast to Llandudno on the north coast The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom, the UK or Britain,is a Sovereign state located Nuclear power is any Nuclear technology designed to extract usable Energy from atomic nuclei via controlled Nuclear reactions The outflow from Trawsfynydd reservoir forms the headwater of the Afon Prysor which flows down another steeply wooded valley before joining the main river at Maentwrog. Maentwrog is a Village and community in the Welsh County of Gwynedd, lying in the Vale of Ffestiniog, with the River Dwyryd Large parts of the flow from the reservoir is channelled through the hydro-electric power station at Maentwrog and the flow from the station re-joins the Prysor before the confluence. Hydroelectricity is electricity generated by Hydropower, ie the production of power through use of the gravitational force of falling water A power station (also referred to as generating station, power plant or powerhouse) is an industrial facility for the generation of

As the river moves into a long tidal estuary, it flows under the railway line and under a toll road and rail bridge known as Pont Briwet. An estuary is a semi-enclosed Coastal body of Water with one or more Rivers or Streams flowing into it and with a free connection to the open A toll road, (also known as a tollway, turnpike, pike, or toll highway, especially if it is constructed to Freeway standards Due south of Portmeirion the river is joined by the Afon y Glyn which drains the south west catchment from Llyn Tecwyn Uchaf and Llyn Tecwyn Isaf. Portmeirion is an Italianate resort Village in Gwynedd, on the coast of Snowdonia in Wales. The confluence is adjacent to Glastraeth (green beach) - a large extent of salt marsh. A salt marsh is a type of Marsh that is a transitional intertidal between land and salty or Brackish water (e

The estuary of the Dwyryd is long and sandy and includes the confluence of the Afon Glaslyn close to the low water mark. The River Glaslyn ( Afon Glaslyn in Welsh) is a River in Gwynedd, north-west Wales. The estuary is hauntingly beautiful, though some consider it spoiled by the crossing of National Grid pylons.

The whole of the river drains off igneous and ancient rocks of the Cambrian and Ordovician which are all base-poor. The Cambrian is a geologic period and system that began about Ma (million years ago at the end of the Proterozoic eon and ended about Ma with The Ordovician is a geologic period and system, the second of six of the Paleozoic era, and covers the time between 488 Much of the catchment has also been used for commercial forestry during the last hundred years. Forestry is the Art and Science of managing forests tree Plantations and related Natural resources. As a consequence, many of the tributaries are highly acidic as a result of atmospheric acidification. Acid rain is Rain or any other form of precipitation that is unusually Acidic It has harmful effects on plants aquatic animals and infastructure This has constrained the quality of the fishery and the bio-diversity in many tributaries. Biodiversity is the variation of Life forms within a given Ecosystem, Biome or for the entire Earth. Some of these problems have been exacerbated by past industrial actions including metal mining, slate mining, animal skin processing and the use by the army of a gunnery range with large amounts of implaced metal cartridge shells. The British Army is the land armed forces branch of the British Armed Forces.