Excerpt: They met like that for two years and then got to work. By 1997, their work attracted the notice of the Kenya Community Development Foundation, and then international aid organizations. Aid groups donated money to dig boreholes and excavate dams. One of the funders, the Aga Khan Foundation, also underwrites this program.
The challenge is how to manage the rainwater and underground water so that neither runs out. “Dam water is runoff water, which is collected during the rains,” Masika says. “If the rains fail, then the only option left is underground water. So we’ll find boreholes, but they are more expensive to dig … four to five times the cost of a dam.”
http://www.pri.org/stories/2014-07-03/rural-kenya-community-organizes-water