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The River Rheidol is a river of mid Wales. Mid Wales (Canolbarth Cymru or simply Y Canolbarth "The Midlands" is the name given to the area of Wales lying between North and South Wales The Rheidol catchment has an area of 246 square kilometres and an average rainfall of 1760 mm of which 1272 translates into river flow. It has an average flow of 9. 657 m³/s at Llanbadarn Fawr and a maximum recorded flow of 145. 285 m³/s on 17 December 1965. Events 546 - Gothic War (535–554: The Ostrogoths of King Totila Year 1965 ( MCMLXV) was a Common year starting on Friday (link will display full calendar of the 1965 Gregorian calendar. Note that the flow is regulated by a hydroelectric power scheme at Cwm Rheidol. Hydroelectricity is electricity generated by Hydropower, ie the production of power through use of the gravitational force of falling water

Nant y Moch Dam
Nant y Moch Dam

Geography and geology

The Rheidol rises in the headwaters of the Nant y Moch reservoir on the western flanks of Plynlimon and then flows south through the village of Ponterwyd on the main Aberystwyth to Rhayader road. Nant-y-Moch (in English = the pig stream) is the name of a small river in north Ceredigion which has given its name to a 66 |} Plynlimon (anglicised from Pumlumon in Welsh, meaning "five peaks" is the highest point of the Cambrian Mountains in Wales. Aberystwyth (Mouth of the River Ystwyth ˌæbəˈrɪstwɪθ Dialect: abɛrˈəstɔʏθ is a historic Market town, administrative centre and holiday resort within Rhayader (Rhaeadr Gwy meaning Wye Falls is a historic Market town in Powys, Wales. Continuing south-westwards, largely through ancient oak woodlands in an increasingly deep valley the Rheidol joins with the Afon Mynach and veers westwards, the direction in which it continues for most of the rest of its course. The term oak can be used as part of the common name of any of about 400 species of Trees and Shrubs in the Genus Quercus (from Latin The Afon Mynach is a small river in Ceredigion, Mid Wales. Its source is at the meeting of two smaller rivers the Nant Rhuddnant and the Afon Merin. At its confluence with the Mynach, it descends one of the most spectacular waterfalls in Wales at Pontarfynach (Devil's Bridge). A waterfall is usually a geological formation resulting from water often in the form of a Stream, flowing over an Erosion -resistant rock Devil's Bridge ( Welsh Pontarfynach) is a Village in Ceredigion, Wales. Below these waterfalls, the river passes the abandoned workings of the Cwm Rheidol lead mine. Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly This mine, together with numerous other metal mines in the valley, has been a source of extreme metal pollution of the river right down to the sea. Even when the mine was closed, a major blowout of water contained in an adit in the late 1960s coloured the whole river an ochre orange colour and greatly added to the concentrations of lead and zinc in the river. An adit is a type of entrance to an Underground mine which is horizontal or nearly horizontal Ochre or Ocher (pronounced /'əʊkə(r/ from the Greek ὠχρός yellow is a Color, usually described as golden - Yellow Management of the waters still draining from the mine is by the use of constructed wetlands. A constructed wetland or wetpark is an artificial Marsh or Swamp, created for anthropogenic discharge such as Wastewater, Stormwater Previous management includes a limestone filter bed, installed in the 1960's, which is now redundant. The filter bed is still in place and can be seen from the road. The remainder of the meandering course of the river is through an ever-widening valley before discharging to the sea through Aberystwyth

Environment

The catchment of the Rheidol is dominated by the western maritime exposure of this part of Wales. Rainfall levels are high and ecosystems reflect both high rainfall and the acidic nature of the underlying rocks. Upland Molinia spp. Molinia is a Genus of two species of grasses. The genus is named after Juan Ignacio Molina, a 19th century naturalist and scientist from grassland is common growing on deep deposits of peat. Peat is an accumulation of partially Decayed Vegetation matter. Within the valleys, dense and ancient oak forests with rich understoreys of ferns, mosses and lichens are common. A fern is any one of a group of about 20000 Species of Plants classified in the phylum or division Pteridophyta, also known as Filicophyta Mosses are small soft Plants that are typically 1–10  cm (0 Lichens (ˈlaɪkən or /lɪtʃən/ are symbiotic associations of a Fungus (the mycobiont with a photosynthetic partner (the photobiont also known as In the valley bottom, glacial and alluvial deposits have been worked by man into a relatively low intensive agriculture.

Courtesy of Tinytrout.com
Courtesy of Tinytrout. com

Economy and the human influence

Metal mining dominated the economy of the Rheidol valley for many centuries. Mining has now been replaced by farming (beef, dairy and sheep), forestry and tourism. A farm is an area of land including various structures devoted primarily to the practice of producing and managing food ( Produce, Grains, or Livestock Beef is the Culinary name for Meat from Bovines especially domestic Cattle (cows Dairy Cattle, generally of the species Bos taurus, are Domesticated Animals bred to produce large quantities of Milk A forest is an area with a high density of Trees There are many definitions of a forest based on various criteria Tourism is Travel for Recreational or Leisure purposes The World Tourism Organization defines tourists as people who "travel

There are a number of tourist attractions in the Rheidol valley. These include the Devil's Bridge waterfalls where three bridges, each built over the previous, span the top of a most spectacular waterfall.

Between Devil's Bridge and Aberystwyth runs a narrow-gauge steam railway - the Vale of Rheidol Railway. The Vale of Rheidol Railway (VoR Welsh: Rheilffordd Dyffryn Rheidol) is a Narrow-gauge gauge Heritage railway that runs for 11¾ miles between This was originally built to ship metal ore from the mines but now provides a very popular tourist route into the top end of the Rheidol valley.


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