The Bangkok Metropolitan Administration (BMA) will propose for a budget from the government to build a tunnel to drain water from Khlong Prem Prachakorn canal to solve the flooding problem in Lak Si, Don Muang, Lat Phrao, Ram-intra and Bang Khen areas.
Sompong Wiangkaew, director of the Drainage and Sewerage Department, said the BMA is conducting a survey of the areas for the construction and working on the design of the tunnel before submitting a proposal for a budget for the project.
He said the areas of Lak Si, Don Muang, Lat Phrao, Ram-intra and Bang Khen are prone to flooding if the rain is heavy. At present, the BMA is draining water out from these areas through Khlong Lat Phrao, Khlong Prem Prachakorn, Khlong Sua Noy and Khlong Song Krathiam canals.
Therefore, a tunnel is needed to drain water out of these areas.
Mr Sompong said Bangkok is prone to flooding. If it rains heavily and the volume of rainwater is between 35 and 90 milimetres or higher, flooding will occur in many low-lying areas.
The city administration has carried out several projects to drain water and the latest one is the tunnel under Khlong Bang Sue. This tunnel has been on a trial run to drain water from Khlong Bang Sue to the Chao Phraya River. It is designed to ease flooding in a 56-square-kilometre area covering Dusit, Phayathai, Bang Sue, Chatuchak, Din Daeng and Huay Khwang districts.
In the trial run of the tunnel under Khlong Bang Sue, six water pumping stations have been in operation. However, the tunnel is not yet operating at its full capacity. It is believed that water will be drained more quickly after the completion of the trial run. After that the entire system will be handed over to the BMA and it will be in full operation by late October.