Name and explain the different formations of lake
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A natural lake is a fairly large body of water occupying an inland basin (low-lying geographic area). Lakes cover only about 1 percent of the continents, and contain less than 0.02 percent of the world's water, but they are importantecosystemsand may be sources of water supply in certain regions.
Lakes are extremely varied in terms of origin, occurrence, size, shape, depth, water chemistry, and other features. Lakes can be only a few hectares in surface area (i.e., less than a square kilometer), or they can be thousands of square kilometers. Their average depth can range from a few meters to more than a thousand meters. Lakes can be nearly uniformly round, or they can be irregularly shaped. Their water can be highly acidic (as in somecalderalakes), nearly neutral, or highly alkaline (as in soda lakes). Lakes can be low in nutrients (oligotrophic), moderately enriched (mesotrophic), or highly enriched (eutrophic).
Lakes may be fresh-water or salt-water (saline). As shown in the table, most of the world's largest lakesare fresh-water, with some exceptions (e.g., Caspian Sea, Aral Sea, and Great Salt Lake). Fresh-water lakes contains less than 1 gram per liter of salt, whereas saline orhypersalinelakes, such as the Great Salt Lake (Utah), may contain more than 250 grams per liter. For comparison, sea water contains about 35 grams per liter. Saline lakes typically occur inaridclimates, and occupy closed basins (low areas which lack stream outflow).
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Lakes are extremely varied in terms of origin, occurrence, size, shape, depth, water chemistry, and other features. Lakes can be only a few hectares in surface area (i.e., less than a square kilometer), or they can be thousands of square kilometers. Their average depth can range from a few meters to more than a thousand meters. Lakes can be nearly uniformly round, or they can be irregularly shaped. Their water can be highly acidic (as in somecalderalakes), nearly neutral, or highly alkaline (as in soda lakes). Lakes can be low in nutrients (oligotrophic), moderately enriched (mesotrophic), or highly enriched (eutrophic).
Lakes may be fresh-water or salt-water (saline). As shown in the table, most of the world's largest lakesare fresh-water, with some exceptions (e.g., Caspian Sea, Aral Sea, and Great Salt Lake). Fresh-water lakes contains less than 1 gram per liter of salt, whereas saline orhypersalinelakes, such as the Great Salt Lake (Utah), may contain more than 250 grams per liter. For comparison, sea water contains about 35 grams per liter. Saline lakes typically occur inaridclimates, and occupy closed basins (low areas which lack stream outflow).
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Lakes are extremely varied in terms of origin, occurrence, size, shape, depth, water chemistry, and other features. Lakes can be only a few hectares in surface area (i.e., less than a square kilometer), or they can be thousands of square kilometers. Their average depth can range from a few meters to more than a thousand meters. Lakes can be nearly uniformly round, or they can be irregularly shaped. Their water can be highly acidic (as in somecalderalakes), nearly neutral, or highly alkaline (as in soda lakes). Lakes can be low in nutrients (oligotrophic), moderately enriched (mesotrophic), or highly enriched (eutrophic).
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