FIGURE $10\mathrm{.}9$

Relative roughness for

various kinds of pipe.

$($After Maody $(29).$

Reprinted with

permission from the

A$.$S$.$M$.$E$.]1$ A reservoir of water is connected to an $8"$ diameter pipe $50$ feet long $($new cast iron$)$ and discharging freely. The WSE$=410\mathrm{.}0$ and the centerline pipe elevation is $372\mathrm{.}5$ feet. Determine the velocity and discharge at the end of the pipe if friction is considered. What is the percent reduction in velocity if friction is considered? $($refer to last homework assignment answer$)$ Use the Darcy$-$Weisbach equation and Moody's Diagram$-$see attached.

#$2$ Two reservoirs $($Elev $1132\text{'}$ and $1079\mathrm{.}5\text{'}$ are connected by a $12"$ concrete pipe $(425\text{'}$ long$).$ Determine the velocity and discharge in the pipe. Consider pipe friction but neglect minor losses. Use the Darcy$-$Weisbach equation and Moody's Diagram$-$see attached.