Question

A catchment area of 60 ha has a runoff coefficient of 0.40. If a storm of intensity 3 cm/h and duration longer than the time of concentration occurs in the catchment, then what is the peak discharge?

• A. $2.0m^3/s$
• B. $3.5m^3/s$
• C. $4.5m^3/s$
• D. $2.5m^3/s$

Answer 1

The correct option is A $2.0m^3/s$

The peak discharge is given by
$Q_p=\frac{\text{AIR}}{360}$

$=\frac{60\times 3\times 10\times 0.4}{360}$
$=2.0m^3/s$