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Encyclopedia > Tonle Sap
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NASA satellite image of the Tonle Sap (the Great Lake)

The Tonlé Sap (meaning Large Fresh Water River but more commonly translated as Great Lake) is a combined lake and river system of huge importance to Cambodia. For most of the year the lake is fairly small, around one meter deep and with an area of 2,700 square km. During the monsoon season, however, the Tonle Sap river which connects the lake with the Mekong reverses its flow. Water is pushed up from the Mekong into the lake, increasing its area to 16,000 square km and its depth to up to nine meters, flooding nearby fields and forests. This provides a perfect breeding ground for fish. At the end of the rainy season, the flow reverses, and the fish are carried downriver. Fish from the lake and river make up 60% of the Cambodians' protein intake.


Further, as the water recedes it leaves rich deposits of sediment in the surrounding area which becomes prime agricultural land for the rest of the year.


The reversal of the Tonle Sap river's flow also acts as a safety valve to prevent flooding further downstream.


The lake occupies a depression created due to the geological stress induced by the collision of the Indian subcontinent with Asia.


Reference

  • Milton Osborne, The Mekong, Turbulent Past, Uncertain Future (Atlantic Monthly Press, 2000) ISBN 0871138069

  Results from FactBites:
 
TonlĂ© Sap Lake - Wikipedia, the free encyclopedia (329 words)
The Tonlé Sap (meaning Large Fresh Water River but more commonly translated as Great Lake) is a combined lake and river system of huge importance to Cambodia.
During the monsoon season, however, the Tonle Sap river which connects the lake with the Mekong river reverses its flow.
The reversal of the Tonle Sap river's flow also acts as a safety valve to prevent flooding further downstream.
Biodiversity Conservation and Social Justice in the Tonle Sap Watershed: The Tonle Sap Biosphere Reserve (16774 words)
Dam on the Mekong and in Tonle Sap watershed
Tonle Sap Lake is the interest of not only national institutions and private sector, it is also the focus of international donors, UN agencies, and NGOs who provide technical and financial assistance contributing to the sustainable development of Lake's resources.
Deforestation in the Tonle Sap watershed is believed to cause erosion, siltation and flooding in the floodplain areas, and destruction of wildlife habitats, agricultural damage and change of the Lake's ecology.
  More results at FactBites »

 
 

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