Tonlé Sap is the largest freshwater lake in Southeast Asia
(fig.).
It dimensions swell and shrink up to five times its original size, depending on
the seasonal monsoons and the flow of the Tonlé Sap River which in the
Southeast converges with the
Mekhong River.
In the rainy
season, when the level of the Mekhong rises rapidly, it
reverses the natural flow of the Tonlé Sap River,
causing it to flow upstream, into the lake.
Tonlé
Sap
Tonlé Sap
Due to the sedimentation that this
brings along its waters are high in nutrients, making it
one of the most fertile inland fisheries in the entire
world.