Flap Gate Weir at Khlong Phra Phut Reservoir automationcontrolsystem 5 ปี ago The Khlong Phra Phut Reservoir is located at Thap Sai, Pong Nam Ron District, Chanthaburi province, Thailand. Due to the flap gate weir at the Khlong Phra Phut Resovoir, its water allocation ability is increased to 8.56million cubic meter. Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook