The physical attributes of the Lake Naivasha catchment rivers

Lake Naivasha is unique in the chain of East African Rift Valley lakes in being the only freshwater ecosystem in an otherwise soda/ saline lake series. Catchment rivers have never previously been surveyed. Valley topography, precipitation patterns and geology create a diversity of river systems draining into Lake Naivasha. Semi- quantitative assessment using the River Habitat Survey technique demonstrates a diversity of habitats and erosion/ sedimentation patterns, reflecting the tectonic origin of the area. The survey descriptions form a basis for identification of areas where efforts will need to be directed for physical and biological protection.