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It originally referred to the well-known subglacial outburst floods from Vatnajökull, Iceland, which are triggered by geothermal heating and occasionally by a volcanic subglacial eruption, but it is now used to describe any large and abrupt release of water from a subglacial or proglacial lake/reservoir.
There are several ways dams can be removed and the chosen method will depend on many factors. The size and type of the dam, the amount of sediment behind the dam, the aquatic environment below the dam, who owns the dam and what their priorities are, and the timeframe of dam removal are all factors that affect how the dam will be removed. [9]
After these water rights were secured, inflows to Owens Lake were heavily diverted, which caused the lake to dry up by 1924. [21] By 1924, farmers and ranchers rebelled. [3] A series of provocations by Mulholland were, in turn, followed by corresponding threats from local farmers, and the destruction of Los Angeles property.
Much of the water reclaimed from the Everglades was sent to newly developed areas. [80] With metropolitan growth came urban problems associated with rapid expansion: traffic jams; school overcrowding; crime; overloaded sewage treatment plants; and, for the first time in south Florida's urban history, water shortages in times of drought. [81]
During the 1970s, the expansion of irrigation projects had begun to disrupt the flow of water to the marshes; by the early 1980s, it was evident that these had significantly affected water levels. [10] Part of the Hammar Marsh was also drained in 1985 during efforts to prepare the area for oil exploration. [11]
In 1967, Roderick Nash published Wilderness and the American Mind, a work that has become a classic text of early environmental history.In an address to the Organization of American Historians in 1969 (published in 1970) Nash used the expression "environmental history", [4] although 1972 is generally taken as the date when the term was first coined. [5]
The protest was due to the fact that the pipeline was supposed to be built on the land of Indigenous communities, and was putting water sources that those communities depend on in danger. Water protectors were the frontline of this protest, dedicating their time to protecting the water source and upholding their treaties. [16]
This is an accepted version of this page This is the latest accepted revision, reviewed on 27 October 2024. Type of aqueduct built in ancient Rome See also: List of aqueducts in the Roman Empire The multiple arches of the Pont du Gard in Roman Gaul (modern-day southern France). The upper tier encloses an aqueduct that carried water to Nimes in Roman times; its lower tier was expanded in the ...