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The water level the Chao Phraya River is expected to peak Oct 24 and 25 because of water run-off from the north high tides, Royal Irrigation Department director-general Chalit Damrongsak said Friday.

Mr. Chalit said water was being released the Chao Phraya Dam Chai Nat Province 2,872 cubic metres per second the Pasak Jolasid Dam Lop Buri 1,200 cubic metres per second.

The volume of water flowing the Chao Phraya River Bang Sai Ayutthaya was about 3,081 cubic metres per second, he said.

Mr. Chalit admitted that his figure was different the estimate of 4,600 cubic metres per second made by Bangkok Metropolitan Administration's drainage and sewerage department.

"No matter what, more water is flowing the Chao Phraya and the water level is expected to be particularly high Oct 24 and 25 when it will be pushed up by the high tides the sea," he said.

He said flood walls along both sides of the river Ayutthaya down Pathum Thani and Nonthaburi should be raised to more than 2m high.

The department's floodwater monitoring centre reported that water had begun to flow parts of Nakhon Ratchasima Province into the Mun River. It was expected to reach Chumphon Buri, Tha Tum and Rattanaburi districts Surin Province in two to five days.

People living both sides of the Mun River these districts Surin should prepare flooding and move their belongings, animals and vehicles high grounds, Mr. Chalit said.