In order to assess the potential impacts of climate change on Tanzania’s water resources in the mid-21st century, the authors introduced the projection of six global circulation models (GCMs) under the most extreme emission scenario (RCP8.5) as inputs to a widely used process-based hydrological model, namely, soil and
water assessment tool (SWAT), and retrieved the predicted time series of precipitation, potential and actual evapotranspiration, surface runoff, water yields, and soil moisture. To achieve realistic and accurate results, the study area was divided into three general categories: country-level, watershed-level, and subbasin-level. Generally speaking, the projected climatic behavior was found to create more favorable conditions for agricultural production during wet seasons because of an increase in the water supply, whereas
in dry seasons less favorable conditions were to be expected.
