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Akosombo Dam
The Akosombo Dam, also known as the Volta Dam, is a Hydroelectricity, hydroelectric dam on the Volta River in southeastern Ghana in the Akosombo gorge and part of the Volta River Authority. The construction of the dam flooded part of the Volta River Basin and led to the subsequent creation of Lake Volta. Lake Volta is the largest man-made lake in the world by surface area. It covers , which is 3.6% of Ghana's land area. With a volume of 148 cubic kilometers, Lake Volta is the world's third largest man-made lake by volume; the largest being Lake Kariba which contains 185 cubic kilometers of water. The primary purpose of the Akosombo Dam was to provide electricity for the aluminium industry. The Akosombo Dam was called "the largest single investment in the economic development plans of Ghana." The dam is significant for providing the majority of both Togo and Benin's electricity, although the construction of the Adjarala Dam (on Togo's Mono River) hopes to reduce these countries' rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akosombo
Akosombo is a small town in the south of the Asuogyaman District, Eastern Region, Ghana with notable street names of some African countries in the sub-region like Ghana, Congo, Namibia, Lagos-town, and Freetown. It is occupied by people of diverse ethnic backgrounds, like the Akans, Ewe, Krobo and other ethnic groups. Akosombo is north of the Adomi Bridge at Atimpoku, which is a 3 to 5 minute drive away. Akosombo Dam The Ghanaian town of Akosombo is the site of the Akosombo Dam. The capital of Asuogyaman District, Atimpoku, is very close by. Gallery File:Akosombo fire station.jpg, A fire truck parked at the Akosombo Fire Service Station File:A sign at Volta Hotel.jpg, Volta Hotel signpost File:Akosombo Township.jpg, Part of the Akosombo township Akosombo Railway Station An Akosombo Railway Station (Akosombo Rail transport) is being prepared for construction Construction are processes involved in delivering buildings, infrastructure, industrial facilities, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schistosomiasis
Schistosomiasis, also known as snail fever, bilharzia, and Katayama fever is a neglected tropical helminthiasis, disease caused by parasitism, parasitic Schistosoma, flatworms called schistosomes. It affects both humans and animals. It affects the urinary tract or the intestines. Symptoms include abdominal pain, diarrhea, blood in stool, bloody stool, or hematuria, blood in the urine. Those who have been Infection, infected for a long time may experience liver damage, kidney failure, infertility, or bladder cancer. In children, schistosomiasis may cause failure to thrive, poor growth and learning disability, learning difficulties. Schistosomiasis is spread by contact with fresh water contaminated with parasites. These parasites are released from infected freshwater snails. The disease is especially common among children in Developing country, underdeveloped and developing countries because they are more likely to play in contaminated water. Schistosomiasis is also common among ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tema
Tema is a city on the Bight of Benin and Atlantic coast of Ghana. It is located east of the capital city; Accra, in the region of Greater Accra, and is the capital of the Tema Metropolitan District. As of 2013, Tema is the eleventh most populous settlement in Ghana, with a population of approximately 161,612 people – a marked decrease from its 2005 figure of 209,000.Tema . GhanaWeb.com. Retrieved 9 March 2013. The Greenwich Meridian (00 Longitude) passes directly through the city.Greater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Smelting
Smelting is a process of applying heat and a chemical reducing agent to an ore to extract a desired base metal product. It is a form of extractive metallurgy that is used to obtain many metals such as iron-making, iron, copper extraction, copper, silver mining#Ore processing, silver, tin, lead smelting, lead and zinc smelting, zinc. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal behind. The reducing agent is commonly a fossil-fuel source of carbon, such as carbon monoxide from incomplete combustion of coke (fuel), coke—or, in earlier times, of charcoal. The oxygen in the ore binds to carbon at high temperatures, as the Chemical energy, chemical potential energy of the bonds in carbon dioxide () is lower than that of the bonds in the ore. Sulfide ores such as those commonly used to obtain copper, zinc or lead, are roasting (metallurgy), roasted before smelting in order to convert the sulfid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aluminium
Aluminium (or aluminum in North American English) is a chemical element; it has chemical symbol, symbol Al and atomic number 13. It has a density lower than that of other common metals, about one-third that of steel. Aluminium has a great affinity towards oxygen, passivation (chemistry), forming a protective layer of aluminium oxide, oxide on the surface when exposed to air. It visually resembles silver, both in its color and in its great ability to reflect light. It is soft, magnetism, nonmagnetic, and ductility, ductile. It has one stable isotope, 27Al, which is highly abundant, making aluminium the abundance of the chemical elements, 12th-most abundant element in the universe. The radioactive decay, radioactivity of aluminium-26, 26Al leads to it being used in radiometric dating. Chemically, aluminium is a post-transition metal in the boron group; as is common for the group, aluminium forms compounds primarily in the +3 oxidation state. The aluminium cation Al3+ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Head
Hydraulic head or piezometric head is a measurement related to liquid pressure (normalized by specific weight) and the liquid elevation above a vertical datum., 410 pages. See pp. 43–44., 650 pages. See p. 22, eq.3.2a. It is usually measured as an equivalent liquid surface elevation, expressed in units of length, at the entrance (or bottom) of a piezometer. In an aquifer, it can be calculated from the depth to water in a piezometric well (a specialized water well), and given information of the piezometer's elevation and screen depth. Hydraulic head can similarly be measured in a column of water using a standpipe piezometer by measuring the height of the water surface in the tube relative to a common datum. The hydraulic head can be used to determine a ''hydraulic gradient'' between two or more points. Definition In fluid dynamics, the ''head'' at some point in an incompressible (constant density) flow is equal to the height of a static column of fluid whose pressure at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penstock
A penstock is a sluice or gate or intake structure that controls water flow, or an enclosed pipe that delivers water to hydro turbines and sewerage systems. The term is of Scots origin, and was inherited from the earlier technology of mill ponds and watermills, with penstocks diverting pond waters to drive the mills. Hydroelectric systems and dams Penstocks for hydroelectric installations are normally equipped with a gate system and a surge tank. They can be a combination of many components such as anchor block, drain valve, air bleed valve, and support piers depending on the application. Flow is regulated to suit turbine operation and is cut off when turbines are not in service. Penstocks, particularly where used in polluted water systems, need to be maintained by hot water washing, manual cleaning, antifouling coatings, allowing waters to go anoxic, and desiccation used to dry fouling out so that it may slough off or become easier to remove through manual processes. The t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floodgate
Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems. They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm surge system. Since most of these devices operate by controlling the water surface elevation being stored or routed, they are also known as crest gates. In the case of flood bypass systems, floodgates sometimes are also used to lower the water levels in a main river or canal channels by allowing more water to flow into a flood bypass or detention basin when the main river or canal is approaching a flood stage. Types Valves Valves used in floodgate applications have a variety of design requirements and are usually located at the base of dams. Often, the most important requirement (besides regulating flow) is energy dissipation. Since water is very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spillway
A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure that water does not damage parts of the structure not designed to convey water. Spillways can include floodgates and fuse plugs to regulate water flow and reservoir level. Such features enable a spillway to regulate downstream flow—by releasing water in a controlled manner before the reservoir is full, operators can prevent an unacceptably large release later. Other uses of the term "spillway" include bypasses of dams and outlets of channels used during high water, and outlet channels carved through natural dams such as moraines. Water normally flows over a spillway only during flood periods, when the reservoir has reached its capacity and water continues entering faster than it can be released. In contrast, an intake tower is a structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embankment Dam
An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface and a dense, impervious core. This makes the dam impervious to surface or seepage erosion. Such a dam is composed of fragmented independent material particles. The friction and interaction of particles binds the particles together into a stable mass rather than by the use of a cementing substance. Types Embankment dams come in two types: the earth-filled dam (also called an earthen dam or terrain dam) made of compacted earth, and the rock-filled dam. A cross-section of an embankment dam shows a shape like a bank, or hill. Most have a central section or core composed of an impermeable material to stop water from seeping through the dam. The core can be of clay, concrete, or asphalt concrete. This type of dam is a good choice for site ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kwame Nkrumah
Francis Kwame Nkrumah (, 21 September 1909 – 27 April 1972) was a Ghanaian politician, political theorist, and revolutionary. He served as Prime Minister of the Gold Coast (British colony), Gold Coast from 1952 until 1957, when it gained independence from United Kingdom, Britain. He was then the first Prime Minister of Ghana, Prime Minister and then the President of Ghana, from 1957 until 1966. An influential advocate of Pan-Africanism, Nkrumah was a founding member of the Organisation of African Unity, Organization of African Unity (OAU) and winner of the Lenin Peace Prize from the Soviet Union in 1962. After twelve years abroad pursuing higher education, developing Nkrumaism, his political philosophy, and organizing with other diasporic pan-Africanists, Nkrumah returned to the Gold Coast to begin his political career as an advocate of national independence. He formed the Convention People's Party, which achieved rapid success through its unprecedented appeal to the comm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volta Aluminum Company
Volta Aluminum Company, known as VALCO, is an aluminium company based in Tema, Greater Accra Region founded by Kaiser Aluminum and now wholly owned by the government of Ghana. History VALCO was a joint venture with Kaiser Aluminum and ALCOA, major aluminum conglomerates both based in the United States, in the British Gold Coast colony in 1948. In 1961, Kaiser Aluminum & the Ghana Government invested in the Akosombo Hydroelectric Project to provide energy for its aluminum smelters. The company had negotiated favorable terms for power purchase with the government. The agreement was re-negotiated in 1985, by the Rawlings government, to reflect the increased value of electrical energy. Documentaries reported favourable conditions for employees, with a hospital on site, maternity leave, long service rewarded by imported white goods (fridges, washing machines, etc.), and housing. Industrial relations had cooled by 1993, when the first union backed strike took place. This resulted in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
