Natural and anthropogenic sources of salinity in the Awash River and Lake Beseka (Ethiopia): Modelling impacts of climate change and lake-river interactions

•The first Integrated Catchment Model of salinity was applied to the Awash River.•Natural and anthropogenic sources of salinity impact the Awash River water quality.•Combined changing climate and Lake Beseka discharge will affect future salinity.•Modeling is essential for generating long term water resources management plans.