Thailand’s Royal Irrigation Department, the RID, yesterday issued a flood warning for provinces in the Chao Phraya River basin, where more water will be discharged from the Chao Phraya Dam starting today.
The amount of water flowing past Nakhon Sawan yesterday was 903 cubic meters per second.
Combined with stormwater and runoff from the Sakaekrang River in Uthai Thani, the total volume of water flowing to the Chao Phraya Dam in Sapphaya District of Chai Nat Province is likely to be 1,300-1,400 cubic meters per second, the director of the RID, Taweesak Thanadechopol, to the press.
Starting today, the dam will increase the amount of water discharged into the Chao Phraya to between 800 and 1,200 cubic meters per second, raising the water level in the river below the dam, he said.
Taweesak said the department will monitor water entering the irrigation system to avoid affecting agricultural areas.
Further reports would be released when the water flowing into the Chao Phraya River reached more than 1,200 cubic meters per second, he said.
The department has also instructed its officials to work with provincial governors and officials to inform residents. Taweesak asked the residents to keep a close eye on the water situation.
In Ayutthaya, water levels in Bang Ban, Sena and Phak Hai districts were expected to rise rapidly by at least 1.5 meters.
The RID said it would regulate water through the Chao Phraya Dam to prevent damage to farmland on both sides of the river.
In the meantime, Bangkok governor Aswin Kwanmuang posted information on his Facebook page yesterday that the Bangkok Metropolitan Administration (BMA) is cleaning more than 3,000 km of drainage pipes through the capital to prepare for the rainy season.
Aswin said Bangkok is in the basin zone, meaning flooding is likely when the downpours come. This can cause problems for people who travel.
He said the BMA had used a pipe jacking technique to increase the surface and groundwater storage area, increased drainage capacity with underground water tunnels that would function as an underground river, and improved pumping stations and sluices that would speed up drainage.
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