Abstract:
The objective of conducting this research is to find a relationship between leakage and chlorine
added in terms of measured values of pressure, the length of pipe, age of the network and type of
pipe for eight different zones in Cairo water supply network.
To achieve this goal, the measured values of water leakage, residual chlorine, pressure, length of
pipes, age and type of pipe within the eight networks have been sorted out.
By using linear regression analysis, the equation that represents the relationship between the
independent, (residual chlorine) and the dependents, has been obtained with acceptable error.
The application of the equation of Hazen -Williams was applied for taking the effect of p ipe type &
age using its friction coefficient on pipe length and then pipe diameter using the flow. Then the
lengths were combined with all other data for each network, to get the relation between leakage and
residual chlorine.
By applying the Program SSPS 10 for windows on the data determined from the field
measurements from zones 1,2,3,5 & 8 it produces an equation simulate the leakage value relation
with the residual chlorine taking into consideration the pipes diameter, length, age and type with the
pressure loss in the studied networks. The produced equation verified with the field measurements
from zones 4, 6 & 7 and was successfully applicable with error less than ±10%.