Flow framework for monitoring

The monitoring of flows will raise awareness of daily flow conditions that are not within the agreed flow framework for monitoring and prompt coordinated action by the Member Countries when needed. Daily monitoring will provide confidence that the PMFM is being implemented and natural flows are being maintained at the selected hydrological stations for meeting important economic, social and environmental needs.


Summary of flow framework for monitoring purposes

 Article referenceFlow framework for monitoring purposes
Article 6A

Acceptable minimum monthly natural flow during each month of the dry season (December - May)

Applied at all stations except Kampong Luong (in the Tonle Sap Lake) and Prek Kdam (in the Tonle Sap River)

  • 1:5 ARI
  • 1:10 ARI
  • 1:20 ARI
Article 6B

Acceptable natural reverse flow of the Tonle Sap taking place during the wet season (June - November)

Applied at Kratie (in the Mekong River) and Prek Kdam (in the Tonle Sap River) as shown, but also using data from Kampong Luong (in the Tonle Sap Lake)

Historically observed maximum and minimum accumulated reverse flow volume at Prek Kdam

Article 6C

Preventing average daily peak flows greater than what naturally occur on the average during the flood season (July - October)

Applied at all stations except Kampong Luong (in the Tonle Sap Lake) and Prek Kdam (in the Tonle Sap River)

  • 1:2 ARI
  • 1:10 ARI
  • 1:20 ARI