This piece of scientific work is of vital importance for those who want to understand and further investigate the temporal variation the chemical characteristics of Lake Ziway - a fresh water lake in the Ethiopian Rift-Valley lakes system. It is devoted to the discussion of variations over years in the salinity and sodicity of the lake. The salinity and sodicity trends are probed in relation to the annual and seasonal variation in the hydro-meteorological factors that determine the chemical characteristics of the lake. It succinctly depicts the causal interrelationship between the temporal...