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71-600: The Spring Hill Reservoirs are two heritage-listed former underground water storage reservoirs within Wickham Park at 230 Wickham Terrace , Spring Hill , City of Brisbane , Queensland , Australia (close to the Old Windmill ). They are also known as Service Reservoirs. They were added to the Queensland Heritage Register on 21 October 1992. The first reservoir was built in 1871, and

142-417: A dam constructed across a valley and rely on the natural topography to provide most of the basin of the reservoir. These reservoirs can either be on-stream reservoirs , which are located on the original streambed of the downstream river and are filled by creeks , rivers or rainwater that runs off the surrounding forested catchments, or off-stream reservoirs , which receive diverted water from

213-537: A block for migrating fish, trapping them in one area, producing food and a habitat for various water-birds. They can also flood various ecosystems on land and may cause extinctions. Creating reservoirs can alter the natural biogeochemical cycle of mercury . After a reservoir's initial formation, there is a large increase in the production of toxic methylmercury (MeHg) via microbial methylation in flooded soils and peat. MeHg levels have also been found to increase in zooplankton and in fish. Dams can severely reduce

284-658: A conventional oil-fired thermal generation plant. For instance, In 1990, the impoundment behind the Balbina Dam in Brazil (inaugurated in 1987) had over 20 times the impact on global warming than would generating the same power from fossil fuels, due to the large area flooded per unit of electricity generated. Another study published in the Global Biogeochemical Cycles also found that newly flooded reservoirs released more carbon dioxide and methane than

355-533: A drop of water seep into the ocean without benefiting mankind." He created the reservoir named Parakrama Samudra ("sea of King Parakrama"). Vast artificial reservoirs were also built by various ancient kingdoms in Bengal, Assam, and Cambodia. Many dammed river reservoirs and most bank-side reservoirs are used to provide the raw water feed to a water treatment plant which delivers drinking water through water mains. The reservoir does not merely hold water until it

426-419: A gable roof is a V-roof or butterfly roof . While a front-gabled or gable-fronted building faces the street with its gable, a side-gabled building faces it with its cullis (gutter), meaning the ridge is parallel to the street. The terms are used in architecture and city planning to determine a building in its urban situation. Front-gabled buildings are considered typical for German city streets in

497-455: A high-level reservoir is filled with water using high-performance electric pumps at times when electricity demand is low, and then uses this stored water to generate electricity by releasing the stored water into a low-level reservoir when electricity demand is high. Such systems are called pump-storage schemes. Reservoirs can be used in a number of ways to control how water flows through downstream waterways: Reservoirs can be used to balance

568-570: A loss in both quantity and quality of water necessary for maintaining ecological balance and pose a risk of increasing severity and duration of droughts due to climate change. In summary, they consider it a misadaptation to climate change. Proponents of reservoirs or substitution reserves, on the other hand, see them as a solution for sustainable agriculture while waiting for a truly durable agricultural model. Without such reserves, they fear that unsustainable imported irrigation will be inevitable. They believe that these reservoirs should be accompanied by

639-419: A narrow valley or canyon may cover relatively little vegetation, while one situated on a plain may flood a great deal of vegetation. The site may be cleared of vegetation first or simply flooded. Tropical flooding can produce far more greenhouse gases than in temperate regions. The following table indicates reservoir emissions in milligrams per square meter per day for different bodies of water. Depending upon

710-470: A nearby stream or aqueduct or pipeline water from other on-stream reservoirs. Dams are typically located at a narrow part of a downstream of a natural basin. The valley sides act as natural walls, with the dam located at the narrowest practical point to provide strength and the lowest cost of construction. In many reservoir construction projects, people have to be moved and re-housed, historical artifacts moved or rare environments relocated. Examples include

781-478: A new policy of constructing service reservoirs to reduce the load on trunk mains was recommended in 1903. This resulted in reconditioning of the reservoirs in 1904–1905, including reconnection with the original Enoggera watermain , and the provision of roofs to prevent the growth of algae , a spray inlet, a floating outlet and a relief valve for the Mount Crosby supply. Other inground reservoirs were built on

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852-611: A reservoir is called the "conservation pool". In the United Kingdom, "top water level" describes the reservoir full state, while "fully drawn down" describes the minimum retained volume. There is a wide variety of software for modelling reservoirs, from the specialist Dam Safety Program Management Tools (DSPMT) to the relatively simple WAFLEX , to integrated models like the Water Evaluation And Planning system (WEAP) that place reservoir operations in

923-450: A river of variable quality or size, bank-side reservoirs may be built to store the water. Such reservoirs are usually formed partly by excavation and partly by building a complete encircling bund or embankment , which may exceed 6 km (4 miles) in circumference. Both the floor of the reservoir and the bund must have an impermeable lining or core: initially these were often made of puddled clay , but this has generally been superseded by

994-740: A river valley, with the potential to wash away towns and villages and cause considerable loss of life, such as the devastation following the failure of containment at Llyn Eigiau which killed 17 people. (see also List of dam failures ) A notable case of reservoirs being used as an instrument of war involved the British Royal Air Force Dambusters raid on Germany in World War II (codenamed " Operation Chastise " ), in which three German reservoir dams were selected to be breached in order to damage German infrastructure and manufacturing and power capabilities deriving from

1065-473: A service reservoir on Windmill Hill (Wickham Terrace) as early as 1862, this was postponed for financial reasons until 1871, when the water pressure was already inadequate due to population expansion and increased consumption. Henry Holmes was the prominent building contractor. Further complaints led to the provision of the second, larger reservoir in 1882, particularly to service the high parts of South Brisbane and Kangaroo Point . Other improvements were made in

1136-430: A single gable roof, while the larger, later one is double-gabled. Excavated deep into the crest of the hill, the disused reservoirs comprise two box-form structures divided into compartments by high arched baffle walls, cast-iron inlet and outlet, valve chambers and pits, and main, outlet and scour pipes. Built of brick before the age of concrete, this type of construction was necessary to withstand external pressure, while

1207-582: A territorial project that unites all water stakeholders with the goal of preserving and enhancing natural environments. Two main types of reservoirs can be distinguished based on their mode of supply. Circa 3000 BC, the craters of extinct volcanoes in Arabia were used as reservoirs by farmers for their irrigation water. Dry climate and water scarcity in India led to early development of stepwells and other water resource management techniques, including

1278-461: A typical element in Gothic architecture, especially in cathedral architecture . Wimpergs often had crockets or other decorative elements in the Gothic style. The intention behind the wimperg was the perception of increased height. The gable end roof is a poor design for hurricane or tornado -prone regions. Winds blowing against the gable end can exert tremendous pressure, both on the gable and on

1349-468: 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. The term is also used technically to refer to certain forms of liquid storage, such the "coolant reservoir" that captures overflow of coolant in an automobile's cooling system. Dammed reservoirs are artificial lakes created and controlled by

1420-476: Is a natural lake whose level was raised by a low dam and into which the River Dee flows or discharges depending upon flow conditions, as part of the River Dee regulation system . This mode of operation is a form of hydraulic capacitance in the river system. Many reservoirs often allow some recreational uses, such as fishing and boating . Special rules may apply for the safety of the public and to protect

1491-484: Is a water reservoir for agricultural use. They are filled using pumped groundwater , pumped river water or water runoff and are typically used during the local dry season. This type of infrastructure has sparked an opposition movement in France, with numerous disputes and, for some projects, protests, especially in the former Poitou-Charentes region where violent demonstrations took place in 2022 and 2023. In Spain, there

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1562-679: Is fraught with substantial land submergence, coastal reservoirs are preferred economically and technically since they do not use scarce land area. Many coastal reservoirs were constructed in Asia and Europe. Saemanguem in South Korea, Marina Barrage in Singapore, Qingcaosha in China, and Plover Cove in Hong Kong are a few such coastal reservoirs. Where water is pumped or siphoned from

1633-501: Is greater acceptance because all beneficiary users are involved in the implementation of the system. The specific debate about substitution reservoirs is part of a broader discussion related to reservoirs used for agricultural irrigation, regardless of their type, and a certain model of intensive agriculture. Opponents view these reservoirs as a monopolization of resources benefiting only a few, representing an outdated model of productive agriculture. They argue that these reservoirs lead to

1704-466: Is needed: it can also be the first part of the water treatment process. The time the water is held before it is released is known as the retention time . This is a design feature that allows particles and silts to settle out, as well as time for natural biological treatment using algae , bacteria and zooplankton that naturally live in the water. However natural limnological processes in temperate climate lakes produce temperature stratification in

1775-400: Is now Brisbane City until 1962. Currently, the reservoirs are covered by three hut-like structures above ground. For many years the reservoirs were locked and inaccessible to the public. However, since 2014, they are used occasionally for cultural events. The reservoirs were built as an essential part of Brisbane 's second phase of water supply development. During the first self-service stage,

1846-536: Is now used by the Aquarius Golf Club. Service reservoirs perform several functions, including ensuring sufficient head of water in the water distribution system and providing water capacity to even-out peak demand from consumers, enabling the treatment plant to run at optimum efficiency. Large service reservoirs can also be managed to reduce the cost of pumping by refilling the reservoir at times of day when energy costs are low. An irrigation reservoir

1917-531: Is poorly suited to forming a single large reservoir, a number of smaller reservoirs may be constructed in a chain, as in the River Taff valley where the Llwyn-on , Cantref and Beacons Reservoirs form a chain up the valley. Coastal reservoirs are fresh water storage reservoirs located on the sea coast near a river mouth to store the flood water of a river. As the land-based reservoir construction

1988-419: Is stored in the reservoir. Any excess water can be spilled via a specifically designed spillway. Stored water may be piped by gravity for use as drinking water , to generate hydro-electricity or to maintain river flows to support downstream uses. Occasionally reservoirs can be managed to retain water during high rainfall events to prevent or reduce downstream flooding. Some reservoirs support several uses, and

2059-473: Is the portion of the reservoir that can be used for flood control, power production, navigation , and downstream releases. In addition, a reservoir's "flood control capacity" is the amount of water it can regulate during flooding. The "surcharge capacity" is the capacity of the reservoir above the spillway crest that cannot be regulated. In the United States, the water below the normal maximum level of

2130-542: The "Queensland heritage register boundaries" published by the State of Queensland under CC-BY 3.0 AU licence (accessed on 5 September 2014, archived on 15 October 2014). Reservoir A reservoir ( / ˈ r ɛ z ər v w ɑːr / ; 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

2201-505: The Gothic period, while later Renaissance buildings, influenced by Italian architecture, are often side-gabled. In America, front-gabled houses, such as the gablefront house , were popular between the early 19th century and 1920. A Wimperg , in German and Dutch , is a Gothic ornamental gable with tracery over windows or portals , which were often accompanied by pinnacles . It was

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2272-452: The Ruhr and Eder rivers. The economic and social impact was derived from the enormous volumes of previously stored water that swept down the valleys, wreaking destruction. This raid later became the basis for several films. All reservoirs will have a monetary cost/benefit assessment made before construction to see if the project is worth proceeding with. However, such analysis can often omit

2343-673: The 1800s, most of which are lined with brick. A good example is the Honor Oak Reservoir in London, constructed between 1901 and 1909. When it was completed it was said to be the largest brick built underground reservoir in the world and it is still one of the largest in Europe. This reservoir now forms part of the southern extension of the Thames Water Ring Main . The top of the reservoir has been grassed over and

2414-580: The Enoggera waterworks system, and a simple but handsome solution to the problem of an adequate water supply, the reservoirs represent both a technical and a creative achievement of the Colonial era. [REDACTED] This Misplaced Pages article incorporates text from "The Queensland heritage register" published by the State of Queensland under CC-BY 3.0 AU licence (accessed on 7 July 2014, archived on 8 October 2014). The geo-coordinates were computed from

2485-731: The Meroitic town of Butana . The Hafirs catch the water during rainy seasons in order to ensure water is available for several months during dry seasons to supply drinking water, irrigate fields and water cattle. The Great Reservoir near the Lion Temple in Musawwarat es-Sufra is a notable hafir in Kush. In Sri Lanka , large reservoirs were created by ancient Sinhalese kings in order to store water for irrigation. The famous Sri Lankan king Parākramabāhu I of Sri Lanka said "Do not let

2556-488: The US. The capacity, volume, or storage of a reservoir is usually divided into distinguishable areas. Dead or inactive storage refers to water in a reservoir that cannot be drained by gravity through a dam's outlet works , spillway, or power plant intake and can only be pumped out. Dead storage allows sediments to settle, which improves water quality and also creates an area for fish during low levels. Active or live storage

2627-488: The amount of water reaching countries downstream of them, causing water stress between the countries, e.g. the Sudan and Egypt , which damages farming businesses in the downstream countries, and reduces drinking water. Gable A parapet made of a series of curves ( Dutch gable ) or horizontal steps ( crow-stepped gable ) may hide the diagonal lines of the roof. Gable ends of more recent buildings are often treated in

2698-535: The area flooded versus power produced, a reservoir built for hydro- electricity generation can either reduce or increase the net production of greenhouse gases when compared to other sources of power. A study for the National Institute for Research in the Amazon found that hydroelectric reservoirs release a large pulse of carbon dioxide from decay of trees left standing in the reservoirs, especially during

2769-428: The base of the dam or some distance away. In a flat river valley a reservoir needs to be deep enough to create a head of water at the turbines; and if there are periods of drought the reservoir needs to hold enough water to average out the river's flow throughout the year(s). Run-of-the-river hydro in a steep valley with constant flow needs no reservoir. Some reservoirs generating hydroelectricity use pumped recharge:

2840-527: The best solution, and continual conflict between council and parliament over control, the new water supply system from Enoggera Dam was constructed by the Brisbane Board of Waterworks and their engineer Joseph Brady in 1863–1866. This was the first reticulated gravity supply and the first municipal engineering undertaking in Queensland. Although Brisbane Mayor Thomas Blacket Stephens proposed

2911-465: The build, often through a temporary tunnel or by-pass channel. In hilly regions, reservoirs are often constructed by enlarging existing lakes. Sometimes in such reservoirs, the new top water level exceeds the watershed height on one or more of the feeder streams such as at Llyn Clywedog in Mid Wales . In such cases additional side dams are required to contain the reservoir. Where the topography

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2982-556: The building of a reservoir at Girnar in 3000 BC. Artificial lakes dating to the 5th century BC have been found in ancient Greece. The artificial Bhojsagar lake in present-day Madhya Pradesh state of India, constructed in the 11th century, covered 650 square kilometres (250 sq mi). The Kingdom of Kush invented the Hafir , a type of reservoir, during the Meroitic period . 800 ancient and modern hafirs have been registered in

3053-457: The city, played a most important role in Brisbane's first reticulated gravity supply system for the best part of a century. In 2017, the site hosted an art installation by Meaghan Streader that featured neon lights. The Spring Hill Reservoirs were listed on the Queensland Heritage Register on 21 October 1992 having satisfied the following criteria. The place is important in demonstrating

3124-442: The context of system-wide demands and supplies. In many countries large reservoirs are closely regulated to try to prevent or minimize failures of containment. While much of the effort is directed at the dam and its associated structures as the weakest part of the overall structure, the aim of such controls is to prevent an uncontrolled release of water from the reservoir. Reservoir failures can generate huge increases in flow down

3195-460: The developed world Naturally occurring lakes receive organic sediments which decay in an anaerobic environment releasing methane and carbon dioxide . The methane released is approximately 8 times more potent as a greenhouse gas than carbon dioxide. As a human-made reservoir fills, existing plants are submerged and during the years it takes for this matter to decay, will give off considerably more greenhouse gases than lakes do. A reservoir in

3266-507: The downstream river to maintain river quality, support fisheries, to maintain downstream industrial and recreational uses or for a range of other purposes. Such releases are known as compensation water . The units used for measuring reservoir areas and volumes vary from country to country. In most of the world, reservoir areas are expressed in square kilometers; in the United States, acres are commonly used. For volume, either cubic meters or cubic kilometers are widely used, with acre-feet used in

3337-440: The environmental impacts of dams and the reservoirs that they contain. Some impacts, such as the greenhouse gas production associated with concrete manufacture, are relatively easy to estimate. Other impacts on the natural environment and social and cultural effects can be more difficult to assess and to weigh in the balance but identification and quantification of these issues is now commonly required in major construction projects in

3408-440: The evolution or pattern of Queensland's history. The Spring Hill service reservoirs are an historic expression of demographic growth, improvement in living standards and local politics in Brisbane during the years of early self-government. The place demonstrates rare, uncommon or endangered aspects of Queensland's cultural heritage. In Queensland they are the first of a series of inground reservoirs, but quite unusual in being

3479-499: The first decade after flooding. This elevates the global warming impact of the dams to levels much higher than would occur by generating the same power from fossil fuels . According to the World Commission on Dams report (Dams And Development), when the reservoir is relatively large and no prior clearing of forest in the flooded area was undertaken, greenhouse gas emissions from the reservoir could be higher than those of

3550-413: The flow in highly managed systems, taking in water during high flows and releasing it again during low flows. In order for this to work without pumping requires careful control of water levels using spillways . When a major storm approaches, the dam operators calculate the volume of water that the storm will add to the reservoir. If forecast storm water will overfill the reservoir, water is slowly let out of

3621-432: The hills of Brisbane and continue to serve the city today. The Spring Hill reservoirs remained an integral part of the Brisbane water supply system until 3 September 1962 when the watermain was shut down, unable to serve an increasingly highrise inner city due to their comparatively small capacity and low elevation. Redevelopment proposals during the 1980s included converting the area into an art gallery, restaurant, theatre in

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3692-580: The hydroelectric reservoirs there do emit greenhouse gases, it is on a much smaller scale than thermal power plants of similar capacity. Hydropower typically emits 35 to 70 times less greenhouse gases per TWh of electricity than thermal power plants. A decrease in air pollution occurs when a dam is used in place of thermal power generation, since electricity produced from hydroelectric generation does not give rise to any flue gas emissions from fossil fuel combustion (including sulfur dioxide , nitric oxide and carbon monoxide from coal ). Dams can produce

3763-690: The inhabitants relied mostly upon natural water courses, wells, tanks and water-carriers. The only public supply was the old convict dam and a hardwood pipeline in the Roma Street hollow (1838), supplemented by an elevated tank in Tank Street (1859). So inadequate and polluted was the water supply that this became a controversial issue as soon as the Brisbane Municipal Council was formed and Queensland's Separation gained in 1859. Despite strenuous debate amongst aldermen regarding

3834-476: The inside walls were rendered to obviate ground water infiltration. The corrugated iron roofs with ample ventilation right along the raised ridges, timber-louvered gables and doorways to descending iron ladders were added later, and evidently painted in contrasting coloured stripes as was the fashion. The service reservoirs, which were built to store water from the Enoggera Dam and improve pressure within

3905-432: The landscape is relatively flat. Other service reservoirs can be storage pools, water tanks or sometimes entirely underground cisterns , especially in more hilly or mountainous country. Modern reserviors will often use geomembrane liners on their base to limit seepage and/or as floating covers to limit evaporation, particularly in arid climates. In the United Kingdom, Thames Water has many underground reservoirs built in

3976-470: The modern use of rolled clay. The water stored in such reservoirs may stay there for several months, during which time normal biological processes may substantially reduce many contaminants and reduce turbidity . The use of bank-side reservoirs also allows water abstraction to be stopped for some time, for instance when the river is unacceptably polluted or when flow conditions are very low due to drought . The London water supply system exhibits one example of

4047-403: The only ones known to have been built of brick with arched baffle walls rather than concrete. The place has potential to yield information that will contribute to an understanding of Queensland's history. The sub-surface pits, chambers and pipes, and the sites of the two former houses have the potential to reveal technical and archaeological evidence. The place is important in demonstrating

4118-415: The operating rules may be complex. Most modern reservoirs have a specially designed draw-off tower that can discharge water from the reservoir at different levels, both to access water as the water level falls, and to allow water of a specific quality to be discharged into the downstream river as "compensation water": the operators of many upland or in-river reservoirs have obligations to release water into

4189-481: The pre-flooded landscape, noting that forest lands, wetlands, and preexisting water features all released differing amounts of carbon dioxide and methane both pre- and post-flooding. The Tucuruí Dam in Brazil (completed in 1984) had only 0.4 times the impact on global warming than would generating the same power from fossil fuels. A two-year study of carbon dioxide and methane releases in Canada concluded that while

4260-426: The principal characteristics of a particular class of cultural places. In Australian context there are important differences in form, material and dating between each of the above reservoirs; but their similarities, particularly between Spring Hill and Adelaide , are such that the former may be treated as a significant example of its type. The place is important because of its aesthetic significance. In addition

4331-437: The quality of the water and the ecology of the surrounding area. Many reservoirs now support and encourage less formal and less structured recreation such as natural history , bird watching , landscape painting , walking and hiking , and often provide information boards and interpretation material to encourage responsible use. Water falling as rain upstream of the reservoir, together with any groundwater emerging as springs,

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4402-638: The reservoir prior to, and during, the storm. If done with sufficient lead time, the major storm will not fill the reservoir and areas downstream will not experience damaging flows. Accurate weather forecasts are essential so that dam operators can correctly plan drawdowns prior to a high rainfall event. Dam operators blamed a faulty weather forecast on the 2010–2011 Queensland floods . Examples of highly managed reservoirs are Burrendong Dam in Australia and Bala Lake ( Llyn Tegid ) in North Wales . Bala Lake

4473-421: The reservoirs have long formed a pleasing part of the "Windmill Hill" reserves, which also include the old convict windmill, a reconstructed signal flagstaff and surrounding parkland. Their dimly lit, resonant and monumental interior spaces are also atmospheric in character. The place is important in demonstrating a high degree of creative or technical achievement at a particular period. As an important part of

4544-635: The round and bus exchange. In 2014, the Underground Opera Company performed in the reservoirs, having spent 3 years cleaning them. The tickets sold out and the Company entered into an arrangement to continue to use the reservoirs for opera until 2017. The low-lying, rectangular and gable -roofed structures behind the Old Windmill Tower conceal Brisbane's first inground service reservoirs. The earlier smaller structure has

4615-517: The same way as the Classic pediment form. But unlike Classical structures, which operate through trabeation , the gable ends of many buildings are actually bearing-wall structures. Gable style is also used in the design of fabric structures , with varying degree sloped roofs, dependent on how much snowfall is expected. Sharp gable roofs are a characteristic of the Gothic and classical Greek styles of architecture. The opposite or inverted form of

4686-501: The second just metres from the first some eleven years after. Both were built primarily of red-brick and mortar, set in-ground. Interiors feature columns and arches between walls for reinforcement. At the time of planning, Spring Hill was considered to be the ideal location for a Brisbane water source, due to its elevation above most of what is now Brisbane CBD . Water was sourced from Enoggera Dam via gravity feed. They were built in 1871 and 1882 by Henry Holmes. They serviced water to what

4757-587: The temples of Abu Simbel (which were moved before the construction of the Aswan Dam to create Lake Nasser from the Nile in Egypt ), the relocation of the village of Capel Celyn during the construction of Llyn Celyn , and the relocation of Borgo San Pietro of Petrella Salto during the construction of Lake Salto . Construction of a dammed reservoir will usually require the river to be diverted during part of

4828-499: The use of bank-side storage: here water is taken from the River Thames and River Lee into several large Thames-side reservoirs, such as Queen Mary Reservoir that can be seen along the approach to London Heathrow Airport . Service reservoirs store fully treated potable water close to the point of distribution. Many service reservoirs are constructed as water towers , often as elevated structures on concrete pillars where

4899-657: The water supply system which coped with the population boom of the 1880s, including the building of the Gold Creek Dam in 1885–1886, and of the Highgate Hill service reservoir which was of mass concrete rather than arched brick walls in 1889. The commissioning of Mount Crosby pumping station in 1893 marked the decline of gravity water supply. The Spring Hill reservoirs were not used after the Gold Creek dam improved reticulation pressure from 1886 onwards, until

4970-412: The water, which tends to partition some elements such as manganese and phosphorus into deep, cold anoxic water during the summer months. In the autumn and winter the lake becomes fully mixed again. During drought conditions, it is sometimes necessary to draw down the cold bottom water, and the elevated levels of manganese in particular can cause problems in water treatment plants. In 2005, about 25% of

5041-476: The world's 33,105 large dams (over 15 metres in height) were used for hydroelectricity. The U.S. produces 3% of its electricity from 80,000 dams of all sizes. An initiative is underway to retrofit more dams as a good use of existing infrastructure to provide many smaller communities with a reliable source of energy. A reservoir generating hydroelectricity includes turbines connected to the retained water body by large-diameter pipes. These generating sets may be at

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