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The side of a levee in Sacramento, California. A levee (/ ˈ l ɛ v i / or / ˈ l ɛ v eɪ /), [a] [1] dike (American English), dyke (British English; see spelling differences), embankment, floodbank, or stop bank is an elevated ridge, natural or artificial, alongside the banks of a river, often intended to protect against flooding of the area adjoining the river.
Embankment (earthworks), a raised bank to carry a road, railway, or canal across a low-lying or wet area; Embankment dam, a dam made of mounded earth and rock; Land reclamation along river banks, usually marked by roads and walkways running along it, parallel to the river, as in:
The Netherlands has a large area of polders: as much as 20% of the land area has at some point in the past been reclaimed from the sea, thus contributing to the development of the country. IJsselmeer is the most famous polder project of the Netherlands. Some other countries which have polders are Bangladesh, Belgium, Canada and China.
By placing these embankments somewhat back from the margin of the river-bed, a wide flood-channel is provided for the discharge of the river as soon as it overflows its banks, while leaving the natural channel unaltered for the ordinary flow. Low embankments may be sufficient where only exceptional summer floods have to be excluded from meadows.
The final elaboration of this thesis is in a 1952 work of the Chilean admiral Rafael Santibáñez Escobar. [2] It was based on scientific studies that showed a correlation between the characteristics of the waters of the southeastern Pacific Ocean and those bounded by the Scotia Arc to the east and the Drake Passage to the west, an area known as the Scotia Sea and sometimes also as the Austral ...
The low-lying areas (dark blue) defended by the river walls, where 1.25 million people live or work. (After Lavery & Donovan, 2005.) (After Lavery & Donovan, 2005.) The tidal Thames today is virtually a canal [ 14 ] [ 2 ] —in central London, about 250 metres wide—flowing between solid artificial walls, and laterally restrained by these at ...
The Atlantis Massif is a prominent undersea massif in the North Atlantic Ocean.It is a dome-shaped region approximately 10 miles (16 km) across and rising about 14,000 feet (4,267 m) from the sea floor.
Breakwaters may also be small structures designed to protect a gently sloping beach to reduce coastal erosion; they are placed 100–300 feet (30–90 m) offshore in relatively shallow water. An anchorage is only safe if ships anchored there are protected from the force of powerful waves by some large structure which they can shelter behind.