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Dam Failure
A dam failure or dam burst is a catastrophic type of structural failure characterized by the sudden, rapid, and uncontrolled release of impounded water or the likelihood of such an uncontrolled release. Between the years 2000 and 2009 more than 200 notable dam failures happened worldwide. A dam is a barrier across flowing water that obstructs, that directs or slows down the flow, often creating a reservoir, lake or impoundments. Most dams have a section called a ''spillway or weir'' over or through which water flows, either intermittently or continuously, and some have hydroelectricity, hydroelectric power generation systems installed. Dams are considered "installations containing dangerous forces" under International humanitarian law due to the massive impact of a possible destruction on the civilian population and the environment. Dam failures are comparatively rare, but can cause immense damage and loss of life when they occur. In 1975 the 1975 Banqiao Dam failure, failure of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Fork Dam
The South Fork Dam was an earthenwork dam forming Lake Conemaugh (formerly Western Reservoir, also known as the Old Reservoir and Three Mile Dam, a misnomer), an artificial body of water near South Fork, Pennsylvania, United States. On May 31, 1889, the South Fork Dam failed catastrophically and 20 million tons of water from Lake Conemaugh burst, through and raced 14 miles (23 km) downstream, causing the Johnstown Flood. The South Fork Dam was originally built between 1838–1853 by the Commonwealth of Pennsylvania as part of the canal system to be used as a reservoir for the state's Main Line of Public Works canal basin in Johnstown. It was abandoned by the commonwealth, sold to the Pennsylvania Railroad, and sold again to private interests. The dam was 72 feet (22 m) high and 931 feet (284 m) long. Between 1881 when the South Fork Fishing and Hunting Club was opened, and 1889, the dam frequently sprung leaks. It was patched, mostly with mud and straw. Additionally, a pre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Air Force
The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) and the Royal Naval Air Service (RNAS). Following the Allied victory over the Central Powers in 1918, the RAF emerged as the largest air force in the world at the time. Since its formation, the RAF has taken a significant role in British military history. In particular, it played a large part in the Second World War where it fought its most famous campaign, the Battle of Britain. The RAF's mission is to support the objectives of the British Ministry of Defence (MOD), which are to "provide the capabilities needed to ensure the security and defence of the United Kingdom and overseas territories, including against terrorism; to support the Government's foreign policy objectives particularly in promoting international peace and security". The R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland, and many smaller islands within the British Isles. Northern Ireland shares a land border with the Republic of Ireland; otherwise, the United Kingdom is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. The total area of the United Kingdom is , with an estimated 2020 population of more than 67 million people. The United Kingdom has evolved from a series of annexations, unions and separations of constituent countries over several hundred years. The Treaty of Union between the Kingdom of England (which included Wales, annexed in 1542) and the Kingdom of Scotland in 170 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earthquake
An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in intensity, from those that are so weak that they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time period. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume. The word ''tremor'' is also used for Episodic tremor and slip, non-earthquake seismic rumbling. At the Earth's surface, earthquakes manifest themselves by shaking and displacing or disrupting the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teton Dam
The Teton Dam was an earthen dam in the western United States, on the Teton River in eastern Idaho. It was built by the U.S. Bureau of Reclamation, one of eight federal agencies authorized to construct dams.Perrow, Charles. ''Normal Accidents''. New York: Basic Books, 1984. , pp.233–238 Located between Fremont and Madison counties, it suffered a catastrophic failure on June 5, 1976, as it was filling for the first time. The collapse of Teton Dam resulted in eleven deaths, and killed 16,000 livestock. The dam cost about $100 million to build and the federal government paid over $300 million in claims related to its failure. Total damage estimates have ranged up to $2 billion, and the dam was not rebuilt. History and geology Interest in building a dam in the eastern Snake River Plain had arisen for many years to control spring runoff and provide a more constant water supply in the summer. The area had suffered a severe drought in 1961, followed by severe flooding in 1962. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internal Erosion
Internal erosion is the formation of voids within a soil caused by the removal of material by seepage. It is the second most common cause of failure in levees and one of the leading causes of failures in earth dams, responsible for about half of embankment dam failures. Internal erosion occurs when the hydraulic forces exerted by water seeping through the pores and cracks of the material in the dam and/or foundation are sufficient to detach particles and transport them out of the dam structure. Internal erosion is especially dangerous because there may be no external evidence, or only subtle evidence, that it is taking place. Usually a sand boil can be found, but the boil might be hidden under water. A dam may breach within a few hours after evidence of internal erosion becomes obvious. Piping is a related phenomenon and is defined as the progressive development of internal erosion by seepage, appearing downstream as a hole discharging water. Piping is induced by regressive erosio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taum Sauk Pumped Storage Plant
The Taum Sauk pumped storage plant is a power station in the St. Francois Mountains, St. Francois mountain region of Missouri, United States about south of St. Louis, Missouri, St. Louis near Lesterville, Missouri, in Reynolds County, Missouri, Reynolds County. It is operated by Ameren, Ameren Missouri. The pumped-storage hydroelectricity, pumped-storage hydroelectric plant was constructed from 1960–1962 and was designed to help meet daytime peak electric power demand. It began operation in 1963. Electrical generators are turned by water flowing from a reservoir (water), reservoir on top of Proffit Mountain into a lower reservoir on the East Fork of the Black River (Arkansas–Missouri), Black River. At night, excess electricity on the power grid is used to pump water back to the mountaintop. The Taum Sauk plant is an open-loop pure pumped operation: unlike some other Pumped storage hydroelectricity, pumped storage sites, there is no natural primary flow into the upper reservo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shakidor Dam
Shadi Kaur Dam (also "Shadikor") was a dam located on the Shadi Kaur river about north of Pasni in Balochistan province of Pakistan. The dam was long. It was constructed in 2003 at a cost of 45 million Pakistani Rupees ($758,853) to provide irrigation for nearby farms. On February 10, 2005, the dam burst due to heavy flooding caused by heavy rainfall, resulting in the deaths of about 70 villagers due to drowning and dragging their bodies into the Arabian Sea. Emergency search and rescue operations by the Pakistani military saved the lives of approximately 1,200 people. See also * List of dams and reservoirs in Pakistan This page shows the Province-wise list of dams and reservoirs in Pakistan According to the International Commission on Large Dams73 dams and reservoirsin Pakistan are over in height. Tarbela Dam is the largest earth-filled dam in the world a ... References Notes External linksPAKISTAN: Evacuations in Balochistan following dam breach* ttp://www.red ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Val Di Stava Dam Collapse
The Val di Stava Dam collapse occurred on 19 July 1985, when two tailings dams above the village of Stava, near Tesero, Italy, failed. It resulted in one of Italy's worst disasters, killing 268 people, destroying 63 buildings and demolishing eight bridges. The upper dam broke first, leading to the collapse of the lower dam. Around 180,000 cubic metres (6,350,000 ft³) of mud, sand, and water were released into the Rio di Stava valley and toward the village of Stava at a speed of 90 km/h (56 mph). Having crashed through the village, the torrent continued until it reached the Avisio River a further 4.2 km (2.6 mi) away, destroying everything in its path. Cause An investigation into the disaster found that the dams were poorly maintained and the margin of safe operation was very small. A pipe in the upper dam used to drain water had begun to sag under the weight of sediment, making the dam's drainage less effective. Meanwhile, water continued to be pumpe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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