The river originates in Preah Vihear and flows to the Tonlé Sap Lake in Kompong Thom, southeast of Phnom Rovieng, Cambodia.

[2][clarification needed] The large reservoir would submerge Kompong Putrea.

Exact data for reservoir size and number of displaced people is not available, nor is any information on the importance of the Stung Sen's flow to the Tonle Sap Lake or fisheries.

The Cambodian government planned to have many dams on the Tonle Sap and the Mekong tributary.

Tonle Sap Lake is the largest fresh water body in Cambodia and serves as a buffer in the Mekong River system for flood mitigation and is the source of beneficial dry season flows.