Abstract:
Kutaber Town water supply has a lot of problems. The aim of this thesis is to evaluate the
hydraulics performance and overall performance of the water supply system. hydraulic
performance of the water supply distribution system was evaluated with water Gems and the
performance of the utility using International Water Association (IWA) performance indicators
were done. additionally, the utility performance in terms of user perception was also evaluated.
The existing model analysis results showed significant pressure problems 62% of junctions
exceeding the upper limit (70m) and 4% falling below the lower limit (15m). The pipe velocity
is from (0 l/sec-3 l/sec) which is out of the standard limit (0.6- 2l/sec). The model calibration
was conducted with the field-measured data using Darwin calibration by Water Gems software.
The calibration results show a Mean Root Square Error (MRSE) of 2.44, indicating the average
error between the observed and simulated values. Additionally, the model has a correlation
coefficient of 1:1, demonstrating a perfect alignment between the model’s predictions and the
observed data. The optimized network was designed to address the unbalanced network issue,
achieving a pressure head ranging from 10m to 81m and maintaining velocities within the
acceptable range of 0.21 up to 1.75 l/sec. By User perception, the performance of the town
water supply has interruption and water pressure is inefficient, while in terms of water quality
the town water supply is good. Also, the utility was evaluated using IWA performance
indicators. the average per capita water consumption in Kutaber town is 30 liters per day (l/c/d)
which is below the standard limit of 50l/c/d. Finally, the distribution system was modified and
optimized by providing alternative connections with pressure reducing valves and changing
connection points by zoning to improve the hydraulic performance and reduce pressure variation of the Town
