Heavy rain and flooding expected across Thailand; dams and waterways closely managed
Thailand braces for increased rainfall and possible flash floods from July 19–23, as the Royal Irrigation Department manages water levels and prepares for the impact on local communities.
The Royal Irrigation Department has issued a warning as heavy rainfall continues to affect northern Thailand, with a low-pressure cell over Laos and Vietnam and the southwest monsoon prevailing over the Andaman Sea, Thailand, and the Gulf.
As of Friday, Mae Ngat Somboon Chon Dam in Chiang Mai Province held 176 million cubic metres of water, 67% of its total capacity, with an additional 89 million cubic metres of space available. Similarly, Mae Kuang Udom Thara Dam in Chiang Mai had 134 million cubic metres of water, or 51% of capacity, with a potential additional 120 million cubic metres to be filled.
In response to rising water levels, officials have been rapidly draining water through Mae Faek Dam and Mae Wang Tan Dam to reduce flood risks in local communities, particularly in the Chiang Mai area.
At 6:00 AM on Friday, the water discharge at P.1 Station in Nawarat Bridge, Chiang Mai was recorded at 266 cubic metres per second, with water levels still below the riverbanks. The water will flow into the Bhumibol Dam in Tak Province, which currently holds 7.79 billion cubic metres of water (58% capacity), with room for an additional 5.6 billion cubic metres.
The Thai Meteorological Department forecasts continued heavy rain across the country from July 19–23, particularly in the North, Northeast, and Central regions. The monsoon trough is expected to bring thunderstorms and heavy rain, with the North experiencing 60-80% coverage of thunderstorms, and some areas facing intense rain.
In the Central region, rain is expected to affect 60-70% of the area, particularly in the west. Bangkok and surrounding provinces should prepare for 60-80% coverage of thunderstorms and heavy rainfall in some areas, while the East will also face storms, with rainfall levels ranging from 60-80% of the area.
The Royal Irrigation Department is closely monitoring the situation, coordinating water management measures to address the situation in affected areas. Machinery, equipment, and personnel are on standby to provide immediate assistance as needed.
