Isnin, 29 November 2010


Meromictic describes a condition whereby two layers of liquids of different densities, in this case, the salty sea water and fresh clear water from rain and five small rivers, remain separated. Usually at a river mouth or a delta, both kinds of water will mingle, creating diluted sea water. Here, the salty sea water, being more dense will remain at the lower layer while the less dense fresh water will remain on top. In terms of temperature also, the sea water remains warm while the fresh water remains cool. Further, since the lower part of the lake lacks oxygen, not many animals can live in there to stir up the two levels of water. Isn't it amazing?

Five small rivers flow into the lake which measures 2.77 square kilometers. At the lake, a natural dam would form by the action of the sea current and the changing monsoon wind pushing the sand into a dike at the river mouth. The strategic presence of a few boulders here also made this natural dam to be possible.
Strange enough, after its session is complete, the dam would break naturally and the water of the lake will flow back into the sea. At this time, visitors would have to be very careful if they are swimming or playing in the lake, because the rush of the current is very strong and they could be sucked out into the open sea.

A meromictic lake has layers of water that do not intermix.[1] In ordinary, "holomictic" lakes, at least once each year there is a physical mixing of the surface and the deep waters.[2] This mixing can be driven by wind, which creates waves and turbulence at the lake's surface, but wind is only effective at times of the year when the lake's deep waters are not much colder than its surface waters.
The term "meromictic" was coined by the Austrian Ingo Findenegg in 1935, apparently based on the older word "holomictic". The concepts and terminology used in describing meromictic lakes were essentially complete following some additions by G. Evelyn Hutchinson in 1937

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