RID to raise Chao Phraya Dam discharge to 2,000m³/s by noon on September 28
The Royal Irrigation Department urges close monitoring of rainfall and river flows as Chao Phraya Dam releases are set to increase on September 28.
- The Royal Irrigation Department (RID) will increase the Chao Phraya Dam's water discharge rate from 1,950 to 2,000 cubic metres per second by noon on September 28.
- The decision was made in response to steadily increasing water inflows caused by heavy rainfall upstream of the dam.
- The RID has warned that if upstream water levels continue to rise, the discharge rate through the dam may need to be increased further.
The Royal Irrigation Department (RID) plans to raise water discharge from the Chao Phraya Dam in Chai Nat from 1,950 to 2,000 cubic metres per second by noon on Monday (September 28, 2026).
In its 10am update on September 28, the RID reported steadily increasing inflows following heavy rain upstream of the Chao Phraya Dam and across the Chao Phraya basin. The department plans to increase releases gradually and then hold the rate at 2,000 cubic metres per second.
Chao Phraya readings show water below riverbank level
At station C.2 in Mueang Nakhon Sawan district, Nakhon Sawan province, the RID recorded a flow of 1,918 cubic metres per second at 10am on September 28, with a water level of 22.51 metres, or 3.69 metres below riverbank level.
At station C.13 at the Chao Phraya Dam in Chai Nat, the RID’s 10am reading on September 28 showed a downstream water level of 14.52 metres, or 1.82 metres below riverbank level. Flow through the station was 1,950 cubic metres per second, while the upstream water level was 17.46 metres.
RID warns upstream rises could increase Chao Phraya Dam flow
The RID urged all sectors to monitor rainfall and river flows closely, warning that a further increase in upstream water levels could lead to more water passing through the Chao Phraya Dam.
The RID will continue monitoring and assessing the water situation and provide regular water-management updates to the public and relevant agencies.
