Flow Rate
What is the flow rate (cfs) of a 30-acre parcel of land that has a rainfall intensity of 1.25 in./hr, and a rational method runoff coefficient
$$C$$
of 0.11?
Expand Hint
$$$Q=CIA$$$
where
$$Q$$
is the peak discharge,
$$C$$
is the runoff coefficient,
$$I$$
is the rainfall intensity, and
$$A$$
is the watershed area in acres.
Hint 2
Solve for peak discharge.
Rational Formula:
$$$Q=CIA$$$
where
$$Q$$
is the peak discharge,
$$C$$
is the runoff coefficient,
$$I$$
is the rainfall intensity, and
$$A$$
is the watershed area in acres. Thus,
$$$Q=(0.11)(1.25\:in/hr)(30\:acres)$$$
$$$Q=4.125\:ft^3/sec$$$
$$$4.125\:ft^3/sec$$$
Time Analysis
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