Portal:Lakes
The Lakes Portal
A portal dedicated to Lakes
Introduction
A lake is a naturally occurring, relatively large and fixed body of water on the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from the ocean, although they may be connected with the ocean by rivers, such as Lake Ontario. Most lakes are freshwater and account for almost all the world's surface freshwater, but some are salt lakes with salinities even higher than that of seawater. Lakes vary significantly in surface area and volume.
Lakes are typically larger and deeper than ponds, which are also water-filled basins on land, although there are no official definitions or scientific criteria distinguishing the two. Lakes are also distinct from lagoons, which are shallow tidal pools dammed by sandbars at coastal regions of oceans or large lakes. Most lakes are fed by springs, and both fed and drained by creeks and rivers, but some lakes are endorheic without any outflow, while volcanic lakes are filled directly by precipitation runoffs and do not have any inflow streams.
Natural lakes are generally found in mountainous areas (i.e. alpine lakes), dormant volcanic craters, rift zones and areas with ongoing glaciation. Other lakes are found in depressed landforms or along the courses of mature rivers, where a river channel has widened over a basin formed by eroded floodplains and wetlands. Some parts of the world have many lakes formed by the chaotic drainage patterns left over from the last ice age. All lakes are temporary over long periods of time, as they will slowly fill in with sediments or spill out of the basin containing them. (Full article...)
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The Ramble and Lake are two geographic features of Central Park in Manhattan, New York City. Part of Frederick Law Olmsted and Calvert Vaux's 1857 Greensward Plan for Central Park, the features are located on the west side of the park between the 66th and 79th Street transverses.
The 38-acre (150,000 m2) Ramble, located on the north shore of the Lake, is a forested area with highly varied topography and numerous winding walks, designated by the New York City Department of Parks and Recreation as a protected nature preserve. It was designed as a "wild garden" away from carriage drives and bridle paths, in which to be wandered, or to be viewed as a "natural" landscape. The Ramble includes several rustic bridges, and formerly contained a small cave. Historically, it has been frequented for both birdwatching and cruising.
The serpentine 20-acre (81,000 m2) Lake offers dense naturalistic planting, rocky outcrops of glacially scarred Manhattan bedrock, small open glades, and an artificial stream (the Gill) that empties through the Azalea Pond, then down a cascade into the Lake. At the northwestern corner of the Lake, the ground rises toward Vista Rock, crowned by a lookout and folly named Belvedere Castle. The western shore includes the Ladies' Shelter, the southern shore contains a waterfront porch called Bethesda Terrace, and the eastern shore contains the Loeb Boathouse. (Full article...)General topics
Lake zones |
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Lake stratification |
Lake types |
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External media
- World Lake Database. International Lake Environment Committee Foundation. – provides a searchable database
- Global Lakes and Wetlands Database. World Wide Fund for Nature. – available for free download