Background
Land governance around the Tonle Sap requires boundary systems that can be understood by national agencies, provincial administrations, cadastral officials, and village-level authorities. The Tonle Sap zoning system uses mapped boundaries and physical boundary posts to distinguish conservation and use areas around the lake. Boundary demarcation supports land administration because local authorities, cadastral officials, and enforcement agencies need common coordinates to identify where protected or restricted areas begin and end.
The Tonle Sap Lake is a central natural resource system in Cambodia, with seasonal flooding that supports fisheries, flooded forests, and local livelihoods. Flooded forests in Tonle Sap Zone 3 function as ecological infrastructure for fisheries habitat, seasonal water storage, and shoreline protection. Clear demarcation of zones around the lake is used to reduce uncertainty over land use, administrative responsibility, and resource protection.
The Tonle Sap Authority operates as a coordinating institution for management activities around the lake, working with provincial administrations and technical departments. In boundary work, inter-ministerial coordination is relevant because zoning affects land administration, natural resource protection, local governance, and enforcement against encroachment or other offenses.
Key Developments
On 4 May 2026, Deputy Secretary-General Chea Sokny led an inter-ministerial working group on behalf of the Tonle Sap Authority to meet with Pursat provincial officials, district administrations, cadastral representatives, commune and village authorities, and other relevant technical units.
The stated purpose was to determine and verify coordinates for boundary posts in cut-out areas of Zone 1 and Zone 2 located within Zone 3 in Krakor district, Pursat province. The work follows Letter No. 188 dated 9 February 2024 from the Office of the Council of Ministers and authorization from Minister of Water Resources and Meteorology Thor Chetha, who also chairs the Tonle Sap Authority.
According to the Tonle Sap Authority, the 2026 work in Pursat continues the second phase of boundary post installation for cut-out areas. The authority stated that approximately 1,300 boundary posts are planned for the relevant areas in Pursat province.
Institutional Role
The Tonle Sap Authority described the work as part of a continuing government effort to mark and manage boundaries around the lake. The authority referred to first-phase boundary post work for Zone 3 in 2024 across six provinces surrounding the Tonle Sap Lake, followed by second-phase work in 2025 in Kampong Chhnang and parts of Kampong Thom.
The involvement of provincial, district, cadastral, commune, and village authorities indicates that boundary confirmation is not only a technical mapping task. It also requires administrative recognition by the authorities responsible for local land records, public order, and resource management.
Operational Implications
Verified coordinates and physical boundary posts can provide a reference point for future administrative decisions involving Tonle Sap zoning, local land management, and conservation monitoring. The posts may also help authorities identify whether specific activities fall inside or outside designated zones.
The Tonle Sap Authority stated that Minister Thor Chetha regularly assigns working groups to inspect and monitor provinces around the lake, particularly in relation to natural resource protection and flooded forest areas in Zone 3. The authority also said the work is intended to support cooperation with territorial authorities and relevant competent bodies in preventing offenses around the Tonle Sap region.
