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Tonl'e Sap
The Great Lake
Tonl'e Sap Lake is situated in the middle of the country. Cambodia's Great Lake is one of the geographical wonders of the world. Its extraordinary biodiversity and hydrology make it an ecological wonder of the world. Tonl'e Sap is 160km long, and 36km wide. During the wet season, it has a size of 10,000 sq km, with a depth of 12m. The Tonl'e Sap has abundant supplies of fresh water fish.

For centuries, the people of the Great Lake have been able to catch 10 tons of fish per sq km, providing the major source of Khmer sustenance. For keen birdwatchers, the aquatic habitat attracts thousands of birds and fish-eating waterfowl, which flock to the wetland before the rain begins in May. Species inhabiting the lake include carp, catfish (weighing up to 135kg), mussels, herring, climbing perch, etc.
On the banks of the mighty Great Lake and Mekong Rivers, people have celebrated for over two hundred years the changing of the river's flow. During the rainy season, the Tonl'e Sap River floods the lake and increases its size almost tenfold, making it the largest fresh water body in Southeast Asia.
During the flooding season, the water engulfs the forest, generating fertile silt for rice cultivation. The silt deposited by the Mekong River makes agriculture in Cambodia an important and high yielding activity.

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