To make water last year-round, Kenyans in dry regions are building sand dams on seasonal rivers
On a dry riverbed one recent sunny morning, residents of Kasengela village toiled away mixing cement and sand to make concrete. The sound of their shovels resonated through the valley while other residents, working in pairs, carried rocks to the site in wooden frames.
They were building a sand dam, a structure for harvesting water from seasonal rivers. The barrier, typically made of concrete, impedes water flow and coarse grains of sand settle behind it, creating an artificial aquifer that fills up during rainy seasons.
Seasonal rivers flow a few times a year here, and with little piped water and few reliable alternatives, many people here depend on them for water. Building sand dams on these rivers, where people can scoop the sand to fetch the water or use looking for reliable water sources. But experts also warn that finding the right sites for structures is key to making them work.
