Flap Gate Weir at Klong Cham Rai Reservoir automationcontrolsystem2 5 years ago The Klong Cham Rai Reservoir is Hoi Khong located at Khlong Hoi Khong, Songkhla province, Thailand. The reservoir was built for the purposes below :Water allocation during the dry season, It can allocate water around 2 million cubic meterWater management in the Songkhla area Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook