For the shown network below in Figure $1,$

a$)$ Estimate the flow in pipe $1$;

b$)$ Using the mass conservations at nodes, identify the initial guess of the flow in all pipes $($use the

initial guess of flow $Q_0$ in pipes $4$&$6$ equal zero$)$;

c$)$ Carry out one full iteration to solve the flow in all the pipes of the network using HCM

approach;

d$)$ Estimate the pressure head at junction D based on the results obtained above in item $($c$).$

Demand $=100\frac{l}{s}$ :

$G.L.=30m$

Demand $=200v$

$G.L=31m$

$G.L=31\mathrm{.}5m$

Figure $1.$ Pipe Network Layout. $($Drawing is Not to Scale$)$

Knowing that:

All pipes are similar in length, diameter and friction coefficient.

Use $f=0\mathrm{.}02$;$L=500m,D=500mm.$

Assume centerline of pipe below ground surface by $2$ m $.$