Estimation of storage tank capacities for different roofing areas for rainwater harvesting in Dodoma urban, Tanzania
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Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
University of Dar es Salaam
Abstract
This study uses a mass balance model and economic analysis technique to present an estimation of roofing areas and storage tank capacity for Rainwater Harvesting (RWH) system. The water-saved benefits were estimated using the monthly rainfall of over 39 years from 1981 to 2020 and five roofing areas. The proposed roof-storage-ratio method presents the minimum requirement of roof area and storage tank size when the ratio value is closer to 1. The benefit-cost ratio and percentage of reliability indicated the optimal roofing areas ranging between 200 and 300 m2 for storage tank capacity between 20 and 25 m3, with a minimum discount rate of 5%. The increased capacity of storage tank and roofing area would also be a potential factor to increase the investment cost for installing the RWH system.
Description
Abstract. Full text article available at https://doi.org/10.52339/tjet.v41i2.784
Keywords
Rainwater harvesting, Roofing area, Storage tank, Rainwater, Rainwater harvest, Dodoma, Tanzania
Citation
Mdee, O. J., Tembo, M. M., & Mwegoha, W. J. (2022). Estimation of storage tank capacities for different roof catchment areas for rainwater harvesting in Dodoma Urban, Tanzania. Tanzania Journal of Engineering and Technology, 41(2).