$1\mathrm{.}7.$ A $5-$acre apartment complex receives $1\mathrm{.}25in\frac{.}{h}r$ of rain for $6$ hr $.$ During the storm event, $0\mathrm{.}1in\frac{.}{h}r$ of water evaporates, and a volume of $15$ acre$-$inches accumulates on the lot. The rest leaves the lot as runoff. Assume that there is no infiltration in this scenario.

$($a$)$ Using a water balance, determine the total volume of runoff generated by the storm and calculate the runoff coefficient$\mathrm{.}1\mathrm{.}7.$ A $5-$acre apartment complex receives $1\mathrm{.}25in\frac{.}{h}r$ of rain for $6$ hr $.$ During the storm event, $0\mathrm{.}1in\frac{.}{h}r$ of water evaporates, and a volume of $15$ acre$-$inches accumulates on the lot. The rest leaves the lot as runoff. Assume that there is no infiltration in this scenario.

$($a$)$ Using a water balance, determine the total volume of runoff generated by the storm and calculate

the runoff coeffi