From 03 to 05 September 2015, the Working Team of the Ministry of Water Resources and Meteorology and the Tonle Sap Authority as well as the Department of Water Resources and Meteorology of the 6 provinces around the Tonle Sap Lake (Kompong Thom, Siem Reap, Banteay Meanchey, Battambang, Pursat and Kampong Chhnang) made a research study on the flood situation in each of the province. This study was to produce the flood mapping and effective flood control.