Tonlé Sap is a river in Cambodia that connects the Tonlé Sap lake with the Mekong river.
The river is known for its unique seasonal reversal, which plays a crucial role in supporting biodiversity, sustaining local livelihoods, enhancing agricultural productivity, and contributing to the ecological, economic, and cultural vitality of the region.
From the lake, the Tonlé Sap flows 147 kilometres (91 mi) southeast to its confluence with the Mekong river near Phnom Penh, the capital of Cambodia.
