Portal:Lakes

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Introduction

Lac Gentau in the Ossau Valley of the Pyrenees, France

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, like the much larger oceans, they form part of the Earth's water cycle by serving as large standing pools of storage water. 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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Sunset on Ganoga Lake

Ganoga Lake is a natural lake in Colley Township in southeastern Sullivan County in Pennsylvania, United States. Known as Robinson's Lake and Long Pond for most of the 19th century, the lake was purchased by the Ricketts family in the early 1850s and became part of R. Bruce Ricketts' extensive holdings in the area after the American Civil War. The lake is one of the highest in Pennsylvania, which led Ricketts to name it Highland Lake by 1874 and rename it Ganoga Lake in 1881; Pennsylvania senator Charles R. Buckalew suggested the name Ganoga from the Seneca language word for "water on the mountain".

The Ricketts built a stone house on the lake shore by 1852 or 1855; this served as a hunting lodge and tavern. In 1873 a large wooden addition was built north of the stone house, which became a hotel known as the North Mountain House. The hotel had one of the first summer schools in the United States in 1876 and 1877. A branch railroad line to the lake served the hotel and also hauled ice cut from the lake for refrigeration. The hotel closed in 1903, though the house remained the Ricketts family summer home. After the death of R. Bruce Ricketts in 1918, his heirs sold much of his 80,000 acres (32,000 ha) to the state for Pennsylvania State Game Lands and Ricketts Glen State Park. The state tried to purchase the lake in 1957, but was outbid by a group of investors who turned the land around it into a private housing development; as such it is "off limits" to the public.

Ganoga Lake is on the Allegheny Plateau, just north of the Allegheny Front, in sedimentary rocks from the Pocono Formation. The Wisconsin Glaciation some 20,000 years ago changed the drainage patterns of the lake; this diverted its waters to Kitchen Creek and carved the 24 named waterfalls in Ricketts Glen State Park in the process. Ganoga Lake has a continental climate, with average monthly high temperatures ranging from 33 °F (1 °C) in January to 82 °F (28 °C) in July. Ganoga Lake's drainage basin is heavily forested and it is in an Important Bird Area. The lake and its surroundings have a variety of flora and fauna, although the ecosystem has been damaged by acid rain. (Full article...)
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Tulainyo Lake is a freshwater alpine lake in the eastern Sierra Nevada in the U.S. state of California
Tulainyo Lake is a freshwater alpine lake in the eastern Sierra Nevada in the U.S. state of California

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