Stormwater runoff has become a significant problem in Addis Ababa, Ethiopia. One of the causes is extended urbanization which has been occurring over the past three decades. The increase in urban areas has considerably altered the natural landscape by replacing pervious land cover with impervious materials and raised a number of environmental and economic concerns. Traditionally, stormwater has been treated with costly engineering solutions including expanding infrastructure and increasing treatment capacity. But, in the past decade, the principles of green infrastructure have been applied as a method for reducing stormwater damage within cities.The main objective of this thesis is to examine and determine the applicability of Green Infrastructure principles for managing the stormwater runoff by comparing the amount of stormwater runoffs of different scenarios in Addis Ababa. Recommendations are provided, based on the results obtained from GIS and hydrologic model applications.