Royal Irrigation Department Joins Forces with EGAT to Gradually Reduce Discharge from Bhumibol and Sirikit Dams to Mitigate Flooding in Lower Chao Phraya Basin

The Smart Water Operations Center (SWOC) of the Royal Irrigation Department reported on May 25, 2025, that water from upper regions continues flowing into the Chao Phraya River basin following accumulated rainfall in the Northern and Upper Central regions, causing the Chao Phraya water level to trend upward. At 6:00 AM on May 25, the C.2 station in Nakhon Sawan recorded a discharge of 1,095 cubic meters per second, while the C.13 station at Chao Phraya Dam in Chai Nat measured 690 cubic meters per second, currently causing no impact to areas along the lower Chao Phraya riverbank.

The Royal Irrigation Department is collaborating with the Electricity Generating Authority of Thailand (EGAT) to adjust water management plans by gradually reducing discharge from Bhumibol Dam in Tak Province and Sirikit Dam in Uttaradit Province in a stepped manner from May 25-31, 2025, to moderate water flow into the lower Chao Phraya basin according to local rainfall conditions.

Bhumibol Dam will reduce its daily discharge from 25 million cubic meters to 15 million cubic meters, while Sirikit Dam will reduce from 20 million cubic meters to 12 million cubic meters daily, respectively, to minimize impacts on downstream areas.

The Royal Irrigation Department has emphasized that all irrigation projects in the Northern and Central regions (Chao Phraya River basin) must continuously monitor water conditions, weather patterns, and rainfall amounts, and coordinate with relevant agencies to alert residents in low-lying areas along the Chao Phraya River to closely follow official government updates and prepare for potential changes in water conditions during this period.