Saving Cambodia’s Great Lake

Every May, when the rains come, water levels in the Mekong start to rise.

When the river flows into Phnom Penh it meets another river that drains from a lake in central Cambodia.
So full is the Mekong that it reverses that river’s flow, forcing water back upstream and expanding the lake more than five-fold.

This is the Tonle Sap, the largest freshwater lake in South East Asia. Cambodians call it the Great Lake.

Link to BBC article.