University of Nairobi ecologist Prof Jesse Mugambi recently told the Christian Science Monitor that this is an economical method to stop erosion and provide water.
"Sand can carry water, store it, filter it, cool it, preserve it, and prevent it from evaporation," Prof Mugambi
A few other community-led organisations have taken up the challenge and are building sand dams on their own.
They include Utooni Development Organisation near Machakos.Musyoka says improved access to water is slowly changing lives of many people.
"Many children used to keep on fetching water instead of going to school or were left at home as parents look for water," he