The Chyulu hills basalt aquifer, Kenya: Isotopic investigations of a major 'natural lysimeter'

The Chyulu Hills of southern Kenya are an important source of water in an otherwise semi-arid region. As part of the hydrogeological investigations, environmental isotope techniques were used to look at the relationships between rainfall and spring discharge, groundwater residence times and the extent to which infiltration conditions might differ over different areas of the hills. In addition they were used to identify sources of water to the Loolturesh wetlands to the SW of the hills.