Updated: 8/24/2018 4:40:27 AM
The huge volume of water discharged from Kaeng Krachan dam into the Phetchaburi river at the rate of 286 cubic metres per second or 24 million cu/m per day, caused the spillover to reach the town six hours earlier than forecast.
The Royal Irrigation Department earlier expected the water to reach Phetchaburi town by Wednesday noon.
Low-lying areas, including the road behind the governor’s residence, Panich Charoen, Ton Chan, Pongsuriya and Mattayawong roads are now flooded.
Published Wednesday, August 22, 2018
Residents in Phetchaburi are bracing for water that is expected to be spilled over from Kaeng Krachan dam tomorrow noon.
The dam is currently holding 777 million cubic metres of water or 109% of its full capacity, the highest level in 10 year, and discharging water at the rate of 286 cubic metres per second.
The spillover is expected to overflow the Phetchaburi river banks to flood Phetchaburi town by noon on Wednesday, provincial irrigation project director Sant Jorncharoen said at an urgent press conference today.
Mr Sant said the water running across the spillway this morning was 1.44 metres high. The water inflow was 25.2 million cu/m per day and the outflow 24.36 million cu/m per day.
Downstream, the Phetchaburi dam was discharging water at the rate of 160 cubic metres per second.
The spillover, which was released from the Kaeng Krachan dam at the rate of 286 cu/m per second, was expected to reach Phetchaburi town by noon on Wednesday.
The town was expected to be about 10-20 centimetres under water and the flooding to stay 5-7 days before receding, Mr Sant said.
Nathawut Phetpromsorn, deputy Phetchaburi governor, said that in this situation all concerned must be fully ready to implement the flood prevention and mitigation plan including building flood prevention walls in low-lying areas along the Phetchaburi river.
Areas expected to be hard-hit are tambons Khlong Krachaeng, Ban Mo, Ton Ma Muang, Ban Kum and Na Mon, he said.
Border provinces along Mekong River were also in peril amid heavy downpours in Laos, with Nakhon Phanom and Ubon Ratchathani on high alert for flooding.
Nong Khai, a border province in the Northeast, was already flooded. Rubber plantations were ravaged by floodwaters in Nong Khai’s Rattana Wapee district, and police were busy helping locals move their belongings to higher ground at the moment.
Nong Khai town was also flooded, though officials were trying hard to pump out the floodwater.
Meanwhile, eight other pro-vinces face varying levels of risk as heavy rains continue. They are Bueng Kan, Sakhon Nakhon, Chanthaburi, Trat, Ranong, Krabi, Trang and Satun.
In Chanthaburi province, the medium-sized Khiri Khan reservoir was full.
Thailand dam spillover Facts
Affected Area: 100 km.
Alert Level: Orange