Amelia's photos with the keyword: Reservoir

The main photo shows the reservoir on World Photography Day, and the first PiP is of the reservoir in February 2014. It's possible to see that today's water levels are significantly lower following a long period of drought and unprecedented high temperatures in July and August, despite significant rainfall here at the beginning of the week. The other 2 PiPs show the Afon Clywedog, taken on August 19, which feeds the reservoir and lies to the west. The dam is to regulate the flow in the River Severn to mitigate flooding and provide support for drinking water abstractions for the West Midlands. It was completed in 1967 and is situated near the B4518 road north of Llanidloes, Powys. It does this by releasing water into the river channel during low flow periods and re-filling during the wetter winter months. This enables major water abstractions to be made from the River Severn to supply the West Midlands with 50 million litres of drinking water. The concrete buttress dam is the tallest concrete dam in the UK, with a height of 72 metres (236 ft) and a length of 230 metres (750 ft). When at capacity the reservoir contains approximately 50,000 megalitres of water. It took me a bit of time to find the photo of the dam from 2014 in my archives. I must try a better system.

A still and misty morning.

Lake Vyrnwy reservoir was built in the 1880s to supply Liverpool with fresh water. The new lake meant that the farms and houses of the people of the valley would be lost underwater. In order to create the large lake the valley of the River Vyrnwy had to be closed off by the huge stone dam and the whole valley behind the dam which contained the old village of Llanwddyn was flooded. Work on the dam building project began in 1881, and for the next eight years the dam wall at the bottom of the valley was steadily getting higher while the people living in the village went about their everyday lives. The buildings of the old village were knocked down after the people moved out, and even the remains of the dead were removed from the churchyard and reburied next to the new church. The dam itself is pretty impressive, 26m high from the bed of the lake to the sill for the overflow, but almost twice that if measured from the buried foundations to the top of the final structure. The dam is 357m long and the base is 36.5m thick. The level of water in the reservoir was very low yesterday, but not low enough to see the remains of the village. It's going to rain heavily tomorrow, so the level might reach the lip of the dam.

This week's Sunday challenge: Vanishing Point (in black and white)

The dam is 358m long, with a maximum height in the centre of 44.2m from foundation to crest. The body of the structure consists of irregularly shaped stone blocks, each up to 10 tonnes in weight. A network of drainage tunnels built into the foundations, and two transverse discharge tunnels through the base of the dam, relieve pressure using hydraulically operated valves. The discharge tunnels release compensation water into the Afon Vyrnwy so that the river does not dry up. Only one of the discahrge tunnels was working on that day. The reservoir has been depleted during the drought in the summer, but is now filling up almost daily. About two thirds of the way along the dam you may spot some High vis jackets. Workmen were repairing the cracks in the dam. A pair of them can be seen in the PiP.

The Elan Valley Reservoirs are a chain of man-made lakes created from damming the Elan and Claerwen rivers within the Elan Valley in Mid Wales. The reservoirs, which were built by the Birmingham Corporation Water Department, provide clean drinking water for Birmingham in the West Midlands of England. The five lakes are known as the Claerwen, Craig-goch, Pen-y-garreg, Garreg-ddu, and Caban-coch. The Elan dam scheme was developed in the 19th century following rapid growth of the population of Birmingham in England due to the Industrial Revolution. The city's expansion resulted in regular outbreaks of water-borne diseases and major epidemics such as typhoid, cholera and dysentery because of the lack of clean water. Victorian politician, Joseph Chamberlain, the leader of Birmingham City Council began a campaign to get clean water from the Elan and Claerwen valleys in mid Wales. The area, which had been identified by civil engineer James Mansergh, would be ideal for water reservoirs because: 1. it had an average annual rainfall of 1,830 millimetres (72 in). 2. dams could be easily built in the narrow valleys. 3. the bedrock was impermeable to water. This photo shows a Foel Tower on the Gerreg-ddu reservoir is built in a style which, like many of the other structures of the waterworks scheme, is known as' Birmingham Baroque'. The elegant stone tower houses a system of valves and cylinders which can be raised and lowered hydraulically to draw water off from the reservoir at various depths as required. This water is then directed into the start of the aqueduct, controlled by valves.

Drinking water reservoir on the route from Ålgård to Brusand

Llyn Brenig is a reservoir located in Wales, in the heart of the Denbigh Moors, at a height of 1200 feet, on the border between the counties of Conwy and Denbighshire. It is used to manage the flow in the River Dee as part of the River Dee regulation system which is designed to protect the water supply for North West England and north-east Wales, particularly Liverpool and its surrounding area.

Lake Vyrnwy is a reservoir in Powys, Wales. Its stone-built dam, built in the 1880s, was the first of its kind in the world. It was built for the purpose of supplying Liverpool and the districts later designated as Merseyside with fresh water. It flooded the head of the Vyrnwy valley and submerged the small village of Llanwddyn. The Lake Vyrnwy Nature Reserve and Estate that surrounds the lake is jointly managed by the Royal Society for the Protection of Birds (RSPB) and Severn Trent Water. Volume of water:59.7 gigalitres (13.125×109 imp gal)

We had been up to this Welsh reservoir the day before and it was very misty, but the autumn colours looked lovely, but very muted at a distance. It was perfect the day after. The larch trees in particular were golden.

Lake Vyrnwy is a reservoir in Powys, Wales. Its stone-built dam, built in the 1880s, was the first of its kind in the world. It was built for the purpose of supplying Liverpool and the districts later designated as Merseyside with fresh water. It flooded the head of the Vyrnwy valley and submerged the small village of Llanwddyn. The reservoir is Severn Trent Water's largest. When full, it is 26 metres (84 ft) deep, contains 59.7 gigalitres (13.125×109 imp gal), and covers an area of 4.54 square kilometres (1,121 acres), the equivalent of around 600 football pitches. The lake has a circumference of 19 kilometres (12 mi) with a road that goes all the way around it. Its length is 7.64 kilometres (4.75 mi). On a clear day the lake, along with many others in North Wales, can be seen from space.

Blåsjø Water Reservoir located in Ryfylke and Setesdal. Blåsjø is Norway's largest artificial lake, and kept in place by 11 small and larger dams.