A reservoir (/ˈrɛzərvwɑːr/; from French réservoir [ʁezɛʁvwaʁ]) is an enlarged lake behind a dam, usually built to store fresh water, often doubling for hydroelectric power generation.
Reservoirs are created by controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an embayment within it, excavating, or building any number of retaining walls or levees to enclose any area to store water.
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Hampstead Heath is an ancient heath in London, spanning 320 hectares (790 acres). This grassy public space sits astride a sandy ridge, one of the highest points in London, running from Hampstead to Highgate, which rests on a band of London Clay. The heath is rambling and hilly, embracing ponds, recent and ancient woodlands, a lido, playgrounds, and a training track, and it adjoins the former stately home of Kenwood House and its estate. The south-east part of the heath is Parliament Hill, from which the view over London is protected by law.
Running along its eastern perimeter is a chain of ponds – including three open-air public swimming pools – which were originally reservoirs for drinking water from the River Fleet. The heath is a Site of Metropolitan Importance for Nature Conservation, and part of Kenwood is a Site of Special Scientific Interest. Lakeside concerts are held there in summer. The heath is managed by the City of London Corporation, and lies mostly within the London Borough of Camden, with the adjoining Hampstead Heath Extension and Golders Hill Park in the London Borough of Barnet.
Lenin Volga–Don Shipping Canal (Russian: Волго-Донской судоходный канал имени В. И. Ленина, Volga-Donskoy sudokhodniy kanal imeni V. I. Lenina, abbreviated ВДСК, VDSK) is a ship canal in Russia. It connects the Volga and the Don at their closest points. Opened in 1952, its length is 101 km (63 mi), 45 km (28 mi) of which is through rivers and reservoirs.
The canal forms a part of the Unified Deep Water System of European Russia. Together with the lower Volga and the lower Don, the canal provides the shortest navigable connection between the Caspian Sea and the world's oceans via the Sea of Azov, the Black Sea, and the Mediterranean Sea.
Lake Nasser (Arabic: بحيرة ناصر Boħeiret Nāṣer, Egyptian Arabic: [boˈħeiɾet ˈnɑːseɾ]) is a large reservoir in southern Egypt and northern Sudan. It was created by the construction of the Aswan High Dam and is one of the largest man-made lakes in the world. Before its creation, the project faced opposition from Sudan as it would encroach on land in the northern part of the country, where many Nubian people lived who would have to be resettled. In the end Sudan's land near the area of Lake Nasser was mostly flooded by the lake. The lake has become an important economic resource in Egypt, improving agriculture and touting robust fishing and tourism industries.
Strictly speaking, "Lake Nasser" refers only to the much larger portion of the lake that is in Egyptian territory (83% of the total), with the Sudanese preferring to call their smaller body of water Lake Nubia (Egyptian Arabic: بحيرة النوبية Boħēret Nubeya, [boˈħeːɾet nʊˈbejjæ]).
The Iskar Reservoir (язовир „Искър“) is the largest reservoir in Bulgaria. Situated on the Iskar River, it provides two-third of the water for the capital Sofia, and also produces hydroelectricity.
The reservoir has a total volume of 673 million m, of which 580 million are in use and the rest is reserve. The reservoir has a drainage basin of 1,046 km and is 25 km long. It is situated at 820 m above sea level, its dam being 204 m long and 76 m high.
The Kyiv Reservoir (Ukrainian: Київське водосховище, romanized: Kyivs’ke vodoskhovyshche), locally the Kyiv Sea (Ukrainian: Київське море, romanized: Kyivske more), is a large water reservoir located on the Dnipro River in Ukraine. Named after the city of Kyiv, which lies to the south, it covers an area of 922 square kilometres (356 sq mi) within the Kyiv Oblast. The reservoir filled in 1964–1966 after the dam for the Kyiv Hydroelectric Power Plant was built at Vyshhorod. The reservoir is mainly used for hydroelectricity generation, industrial and public consumption, and irrigation.
The reservoir is 110 km in length, 12 km in width, has a depth of four to eight meters, a volume of 3.7 km (0.89 cu mi), and a usable volume of 1.2 km (0.29 cu mi). The reservoir, together with the Kakhovka Reservoir (destroyed in 2023 during Russian invasion of Ukraine), the Dnieper Reservoir, the Kamianske Reservoir, the Kremenchuk Reservoir, and the Kaniv Reservoir, has created a deep-water route on the river. However, its creation has also contributed to significant environmental problems such as the diminished flow velocity which reduces water oxygenation, and has a negative result on the balance of aquatic life forms. Also, some nearby villages were flooded when it filled. One of these was Teremtsi, where the residents of the village persuaded Soviet authorities to let them stay, only to be evacuated later in 1986 during the Chernobyl disaster.
The River Lee (Irish: An Laoi) is a river in Ireland. It rises in the Shehy Mountains on the western border of County Cork and flows eastwards through Cork, where it splits in two for a short distance, creating an island on which Cork's city centre is built, then passes through Cork Harbour on the south coast, one of the largest natural harbours in the world, to empty into the Celtic Sea. The catchment area of the River Lee is 1,253 km. The long-term average flow rate of the River Lee is 40.4 cubic metres per second (m/s).
A hydro-electric scheme was built on the river, upstream from Cork City, and this part of the river now contains the Carrigadrohid and Inniscarra reservoirs. The river is crossed by 42 bridges, 29 of which are in Cork City, and one tunnel. The river also provides an 8-kilometre (5.0 mi) stretch of salmon fishing.
A tide mill is a water mill driven by tidal rise and fall. A dam with a sluice is created across a suitable tidal inlet, or a section of river estuary is made into a reservoir. As the tide comes in, it enters the mill pond through a one-way gate, and this gate closes automatically when the tide begins to fall. When the tide is low enough, the stored water can be released to turn a water wheel.
Tide mills are usually situated in river estuaries, away from the effects of waves but close enough to the sea to have a reasonable tidal range. Cultures that built such mills have existed since the Middle Ages, and some may date back to the Roman period.
The West Pennine Moors is an area of the Pennines covering approximately 90 square miles (230 km) of moorland and reservoirs in Lancashire and Greater Manchester, England. It is a Site of Special Scientific Interest.
The West Pennine Moors are separated from the main Pennine range by the Irwell Valley to the east. The moorland includes Withnell, Anglezarke and Rivington Moors in the extreme west, Darwen and Turton Moors, Oswaldtwistle Moors and Holcombe Moors. These moors are lower in height than the main spine of the South Pennines. At 1,496 feet (456 m), the highest point is at Winter Hill. The area is of historical importance with archaeological evidence of human activity from Neolithic times. The area is close to urban areas, the dramatic backdrop to Bolton, Blackburn and Bury and neighbouring towns affording panoramic views across the Lancashire Plain and the Greater Manchester conurbation. The moorland is surrounded by the towns of Bolton, Chorley, Darwen, Horwich, Ramsbottom, Haslingden and Oswaldtwistle. Notable structures include Rivington Pike Tower, Winter Hill transmitting station, Peel Monument near Holcombe and the Jubilee Tower on Darwen Moor.
The John Day Dam is a concrete gravity run-of-the-river dam spanning the Columbia River in the northwestern United States. The dam features a navigation lock plus fish ladders on both sides. The John Day Lock has the highest lift (at 110 feet or 34 meters) of any U.S. lock. The reservoir impounded by the dam is Lake Umatilla, and it runs 76.4 miles (123.0 km) up the river channel to the foot of the McNary Dam. John Day Dam is part of the Columbia River Basin system of dams.