Suranga

Suranga (also Surangam or thurangam) (English: Tunnel well) is a traditional water management system used to provide a reliable supply of water for human settlements and irrigation in Kasargod district of Kerala and Dakshin Kannada district of Karnataka, India.

[1]: 660 [2] It is believed that, the traders who used to travel along the Silk Route had spread the technique of the construction of quanat from ancient Persia to India, China, Saudi Arabia, North Africa, Spain, Cyprus and Canary Islands.

[5] The digging takes places mainly during the dry season, in between February and May, to prevent collapsing of wall due to presence of moisture in the soil.

[8] The tunnels are generally rectangular or dome-shaped with an optimal height and width which allows a man to work and pass comfortably.

[1]: 662  The water can then be collected by using a temporary small barrier or dam with mud, which then can flow through a plastic or bamboo pipe into a storage pit or tank.