lakes :l
lakes ya sarcasum
about lakes
A lake usually contains freshwater but some can be saltwater.The study of inland water bodies and ecosystems is called Limnology.Lakes differ to lagoons and estuaries due to the fact they are not connected to the ocean. A lake is also larger and deeper than other inland water bodies such as ponds.
Sunset on Lake Baikal
Sunset on Barguzin Bay, Zabaikalski National Park, Lake Baikal, Siberia, Russia. Lake Baikal is the oldest (25 million years), deepest (5700 feet) and largest lake in the world by volume (it holds 20% of the earth's liquid fresh water). Threatened by pollution and most recently by an oil pipeline, Baikal has become a rallying point for Russian and international conservationists. Baikal was declared a World Heritage Site in 1996. Boyd Norton, the photographer here, worked with Russian and U.S. environmentalists to get Baikal designated a World Heritage Site.
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rivers
- A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as stream, creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features,[1] although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek,[2] but not always: the language is vague.[3]
- Rivers are part of the hydrological cycle. Water generally collects in a river from precipitation through a drainage basin from surface runoff and other sources such as groundwater recharge, springs, and the release of stored water in natural ice and snowpacks (e.g. from glaciers). Potamology is the scientific study of rivers while limnology is the study of inland waters in general.
- Extraterrestrial rivers have recently been found on Titan.[4][5] Channels may indicate past rivers on other planets, specifically outflow channels on Mars[6] and are theorised to exist on planets and moons in habitable zones of stars.