QUESTION $2($water supply and distribution, $25$ marks$)$ The typical building in the serviced area is a two$-$storey single family brick house. The

spacing between the houses is between $3$ m and $10$ m $.$

Estimate the town's population at the end of the design period. $[5$ mark $]$

Estimate the required fire flow for a typical house in the serviced area. $[5$ mark$]$

Estimate the daily and hourly peak factor for the serviced area. $[5$ mark$]$

Estimate the minimum and maximum flows in the water main. $[5$ mark $]$

The water main is $3$ km long and is made of concrete $(n=0\mathrm{.}011).$ Assuming a

pressure difference of $20$ m at the extremities of the main, calculate its diameter. $[5$

mark$]$

The design life of a planned water distribution system is to end in $2030.$ The population in

the serviced area between $1920$ and $1990$ is given in the Table below.

Table $1$ : population erolution between $1920$ and $1990$