The department asked for understanding by the people in allowing the department to do its job and drain the floodwater to the Gulf of Thailand through water gates in Bangkok.
The request came after people in some areas in Bangkok tried to block the draining of the water.
“Lack of understanding of people in some areas have it more difficult for us to drain water from upper part of Bangkok to the Gulf of Thailand,” the department said in its statement.
The department said the water volume in Chao Phaya River in Nakhon Sawan has continuously decreased, resulting in reduction of water in the lower part of Chao Phaya Basin.
However the water volumes in Sing Buri, Angthong and Ayutthaya remain the same due to the remaining water volume in the fields. The water is expected to reduce if there is no more rain and the draining of water runs more smoothly.