My America. Great lakes – the largest lake of the world all together contain less water than the lake – VOICES MY AMERICA
Great lakes (Fig. Great Lakes, FR. Grands Lacs) — a Grand natural system of freshwater lakes in North America, in the U.S. and Canada. Includes a number of large and medium-sized reservoirs, connected by rivers and Straits. An area of about 245,2 thousand km², the volume of water is 22.7 thousand km³.
To actually five Great lakes include the largest: Upper, Huron, Michigan, Erie and Ontario. They are associated with several medium-sized lakes, the most important of which are the St. Marys, St. Clair, Nipigon. These lakes belong to the basin of the Atlantic ocean. Stoke on the St. Lawrence river. On the formation of lake basins are significantly influenced by tectonic processes. The weight of the glacier pushed the earth’s crust, and after the glacier melted away, she slowly began the process in reverse: post-glacial uplift, which is also very noticeable in the area of the Gulf of Bothnia and Finland. The water mass of lakes formed by the melting of the glacier. North coast Great lakes South rises faster, which leads to the effect of “transfusion” water and slow the flooding of land in the South.
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The supply of fresh water Petrodvorets, Lomonosov, the red Village is due to extraction of groundwater. In particular, Krasnoselskii water system water is supplied from captaia, created on the basis of deposits of fissure-karst waters. On the fissure-karst aquifers the drilling of wells. and water features a good quality. Deposits of karst rocks in the Leningrad region found extremely small, but in Boksitogorsk district of the nature of karst is manifested in all its glory.
On the border of Leningrad and Novgorod areas there are lakes and streams, United in Spirovska water system length of approximately ten kilometers. Lakes and rivers have karst origin that makes them exceptional properties, namely, periodic disappearance, when the waters suddenly disappear with all its inhabitants, and then just as suddenly re-emerge.
Spirovska lake is not too deep and are renowned for with numerous bays and tributary waters in the rivers and rukako. The lakes are replenished with water mainly due to numerous natural springs. Every 5-7 years is incredible: water from lakes goes underground through sinkholes large diameter — one of which reaches 40 meters in diameter. The water noise is drawn into the mouth, literally a week later, the lake dries Continue reading
Lake Plastira – Thessaly Switzerland
Lake Plastira (the official name of the Tavropos ) is an artificial lake . located in the mountains of Thessaly (kardítsa district), at an altitude of 750 meters, supplying water to the Hydroelectric settlement and Tavropos of Karditsa.
The Tavropos reservoir – manmade – blue “shred” on a green canvas created by nature; the creation of man and nature, which became one of the most beautiful places in Greece, ideal for a relaxing holiday in all seasons .
Interestingly, the human intervention has not worsened the climate of the region, but rather is improved, contributing to the development of this district in all spheres of life and especially in travel .
Currently the lake Plastira with its scattered here and there, traditional villages, beautiful fjords, crystal clear water, in which more than 10 species of fish, on the right is the decoration district of Karditsa.
In addition, lake Plastira has a remarkably convenient geographical position, is situated at 325 km from the capital of Greece and 250 km from Thessaloniki.
In ancient times there ran the river Tavropos . which in the South was connected to Acheloos . the second longest river of Western Greece. The very same area was called Continue reading