Water Quality Modeling of Water Supply Distribution System (The Case of Tuffa Bulbula Multi-Village Water Supply Scheme)
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Date
2014-12
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Addis Ababa University
Abstract
Water distribution systems are designed to fulfill all requirements of potable water needed
for intended purposes. Initial system designs frequently consider any anticipated changes
likely to happen. However, as time elapsed they slowly begin to fail to satisfy customers’
requirements, both in quantity and quality. The main issue is to identify factors which bring
those changes and propose viable solutions to improve the situation. To this effect modeling
water supply distribution network system is very helpful. In this study, Tuffa-Bubula multivillage
Water distribution system was assessed as a case study.
EPANET software was used as tool to model water distribution system. The modeling effort
included both hydraulic and water quality modeling. Simulation results for maximum and
minimum pressures were used as base to evaluate the hydraulic performance and
simulation result for water age and minimum residual chlorine were used as base to assess
water quality transformation in the distribution system. Modeling results showed violation of
maximum and minimum pressure requirements. Along with this, water quality simulation
results indicated water quality deterioration due to insufficient residual chlorine which is
below WHO guideline. To retrieve the situation there is a need to intervene. Modifications in
operation and design will improve the current situation of the case study of water distribution
system.
Keywords:- Water distribution system, modeling, Hydraulic performance, Water
quality, Maximum pressure, Minimum pressure, Water age, Residual chlorine, Tuffa-
Bulbula, Ethiopia.
Description
Keywords
Water distribution system, Modeling, Hydraulic performance, Water quality, Maximum pressure, Minimum pressure, Water age, Residual chlorine, Tuffa- Bulbula, Ethiopia