Other Rain Water Harvesting Structures.
A school water tank guttering water from a roof catchment.
A school water tank(Roof Catchment) as a source of water to the students.
A tank for a rock catchment and pipe guttering water from the top surface rock.
Rock Catchment showing the piping and the tanks.
Other than sand dams, ASDF also helps communities construct other water harvesting structures. Communities have the option to request for school water tanks and/or rock catchments to increase their water harvesting and storage capacity.
School water tanks are usually constructed at schools where most of the Self Help Group members are parents. Once a community requests assistance for a school water tank and it gets approved, they embark on the process of collecting local materials. The construction of a school tank makes learning more convenient and life in school bearable. Students are no longer forced to carry water jerry-cans to school on a daily basis to serve the school water needs. Drinking water becomes readily available and pupils and students are no longer prone to waterborne diseases as the water they drink is not contaminated. So far, sixty nine (69) 90M3 tanks have been constructed in school serving 20,700 pupils and students.
Rock catchments are a relatively new technology. A concrete wall is constructed on the sloppy side of a slanting rock outcrop, serving as a gutter. This wall is called a weir and it directs run off from the rock outcrop to a catchment tank. At the base of the rock, a number of tanks are constructed. It is these that hold water the water that serves the communities in the dry season. Depending on the size of the rock, many tanks can be constructed. So far, ASDF has constructed eight (8) rock catchments with a total of twenty one (21) 104M3 tanks. Cumulatively, these tanks hold 2,184,000 litres of water or 2,184M3!
Rock catchments serve a wider range of people than all the other water catchment structures because they are centrally located and are easily accessible. They are not limited to the rivers. Water from these is also clean. It is never saline and tastes like mineral water!