ENG  Vol.5 No.10 , October 2013
Quantifying Rooftop Rainwater Harvest Potential: Case of Mbeya University of Science and Technology in Mbeya Tanzania
Abstract

The advantages that the rooftop rainwater harvesting system has as a source of water supply have been examined. The observed daily rainfall records of 10 years and the current total roof area of the facilities at Mbeya University of Science and Technology as the catchment area were used. Using a water balance model to determine the suitable water use that will cover 100% of the time, the model indicated that for the current roof area a water supply of 120 lts per day can be met when a storage tank whose capacity is 13.5 m3 is installed. When values higher that 120 l/day are simulated a tank of higher capacity is required to meet the water demand. The study recommends on the necessity of installing rooftop rainwater harvesting system so as to increase the water supply reliability and reduction of cost. The selection of a suitable storage tank capacity should take into consideration the future development plans so as to reduce the construction cost of new storage tank.


Cite this paper
Katambara, Z. (2013) Quantifying Rooftop Rainwater Harvest Potential: Case of Mbeya University of Science and Technology in Mbeya Tanzania. Engineering, 5, 816-818. doi: 10.4236/eng.2013.510098.
References

[1]   D. Rutashobya, “Experiences Gained in the Development of Rainwater Catchment in Tanzania,” Proceeding of the 9th International Conference on Rainwater Catchment Systems, Petrolina, 1999.

[2]   F. A. Abdulla and A. W. Al-Shareef, “Roof Rainwater Harvesting Systems for Household Water Supply in Jordan,” Desalination, Vol. 243, No. 1-3, 2009, pp. 195-207.
http://dx.doi.org/10.1016/j.desal.2008.05.013

[3]   L. Handia, J. M. Tembo and C. Mwiindwa, “Potential of Rainwater Harvesting in Urban Zambia,” Physics and Chemistry of the Earth, Parts A/B/C, Vol. 28, No. 20-27, 2003, pp. 893-896.

[4]   B. Mati, et al., “Mapping the Potential of Rainwater Harvesting Technologies in Africa,” 2007.

[5]   M. Sturm, et al., “Rainwater Harvesting as an Alternative Water Resource in Rural Sites in Central Northern Namibia,” Physics and Chemistry of the Earth, Parts A/B/C, Vol. 34, No. 13-16, 2009., pp. 776-785. http://dx.doi.org/10.1016/j.pce.2009.07.004

[6]   C. B. Mendez, et al., “The Effect of Roofing Material on the Quality of Harvested Rainwater,” Water Research, Vol. 45, No. 5, 2011, pp. 2049-2059. http://dx.doi.org/10.1016/j.watres.2010.12.015

[7]   M. I. Yaziz, et al., “Variations in Rainwater Quality from Roof Catchments,” Water Research, Vol. 23, No. 6, 1989, pp. 761-765. http://dx.doi.org/10.1016/0043-1354(89)90211-X

[8]   A. Mayo and D. Mashauri, “Rainwater Harvesting for Domestic Use in Tanzania: A Case Study: University of Dar es Salaam Staff Houses,” Water International, Vol. 16, No. 1, 1991, pp. 2-8.
http://dx.doi.org/10.1080/02508069108686093

[9]   Y.-R. Chiu, C.-H. Liaw and L.-C. Chen, “Optimizing Rainwater Harvesting Systems as an Innovative Approach to Saving Energy in Hilly Communities,” Renewable Energy, Vol. 34, No. 3, 2009, pp. 492-498. http://dx.doi.org/10.1016/j.renene.2008.06.016

[10]   J.-M. Mwenge Kahinda, A. E. Taigbenu and J. R. Boroto, “Domestic Rainwater Harvesting to Improve Water Supply in Rural South Africa,” Physics and Chemistry of the Earth, Parts A/B/C, Vol. 32, No. 15-18, 2007, pp. 10501057. http://dx.doi.org/10.1016/j.pce.2007.07.007

 
 
Top