Large parts of the world cope with problems of water supply during periods of low rainfall and consequent low or no river discharge. Kitui District is a semi arid region in Kenya where, during the dry season, communities in rural areas almost completely rely on water abstraction through hand-dug wells (scoop holes) in the dry sand riverbeds. To increase water availability during the dry season, SASOL (a local NGO) builds sand storage dams. The construction of sand dams has turned out to be very successful in increasing groundwater storage capacity, prolonging the period of groundwater availability (bridging dry seasons) and improving water quality.
HOOGMOED, M. (2007): Analyses of impacts of a sand storage dam on groundwater flow and storage. Amsterdam: Vrije University URL [Accessed: 20.12.2011] PDF