Assessment of Potentiality For Surface Runoff Rainwater Harvesting at the University of Dar es Salaam

water shortage at the University of Dar es Salaam - Mwalimu Nyerere Campus is real. This research work was conducted to identify the potentials and earmark locations for harvesting the rainwater and establish the quantities, to supplement the current source. The methodology utilized rainfall data collection from the meteorological Station located in the Mwalimu Nyerere Campus, site visits, Google Earth and elevation data extracted from the Digital Elevation Model using ArcGIS. The rainfall -runoff parameters were integrated using a rational model to establish the relationships under study. The research examined four locations namely: location A near the University’s dumpsite which had rainwater flow of 1.0 m3/s, location B at the right of Sam Nujoma, Road when looked the University roads and geti-maji which had flow of 0.41m3/s.The location C, an area before the entrance to the college of Engineering and Technology and location D, opposite Udasa club which had flows of 0.76M3/S and 0.3 m3/s respectively. The 10 days’ rainfall represented and sample for the six moths of the rainy season. The amounts from catchment at locations A, B, C and D were 864,000 m3, 354, 240 m3, 656,640 m3 and 293 760 m3 respectively, totaling to 2, 168,640 m3 an amount of water enough to fill about 1000 Olympic size pools. Considerable amount of water can be harvested at these locations mentioned and utilized for domestic, gardening farming and fishing purpose. It is recommended to build a reservoir/storage dam that can harvest, make use of the water and appreciate the above – mentioned benefits.