Water is one of the most important compound that comprises our largest planet' (earth), and is the fluids of most organisms that are living on earth [1]. It constantly circulates in between atmosphere and earth surfaces, which includes the land, rivers, lakes, ponds and oceans that make up our planet. 70.9% of the earth surfaces are covered by water, and of which about 97% is found in salt water oceans, 2.4% are ice caps, 0.6% are land surface water such as rivers, lakes and ponds, 1.6% water is retained in the ground water, and the remaining 0.001% is found as vapor, clouds and precipitation [1,2]. Africa appears to have abundance water resources including more than 17 big rivers, which covered over 1,700,000 km 2 , more than 160 lakes, which covered larger than 27 km 2 catchments, vast wetlands, and limited but widespread. The annual average precipitation of Africa is plentiful, as compared to that of Europe and North America [3]. Water in Africa is mainly uses for agriculture and domestic purpose. However, utilization of water for industry purpose is very low, which is estimated to be only 3.8% of total annual renewable water resources [4]. Our country Ethiopia, has totally 12 river basins with annual runoff volume of 122 billion m 3 of water, and the estimated runoff is equivalent to 2.6-6.5 billion m 3 of ground water potential. Addis Ababa, the capital city of Ethiopia, has a number of rivers, which are the tributary of main/big/tiliku and little/small/tinishu Akaki River [5]. For example, Kebena, Banche Yeketu, Kortame, Bulbula, Lequ Soramba and kotebe and Fincha, rivers are the main tributaries of the Akaki Rivers [6]. Both of the big and small Akaki rivers are the main branches of Akaki river, which are flowing into the southern direction of Aba-Samuel Lakes [7]. The Great Akaki river rises from northeastern part (Entoto Kidane Miheret Mountain area) of Addis Ababa city and flows into the eastern part of city [6], and finally runs into Aba-Samuel dam after 53 km.