Question

A 2-hour unit hydrograph can be approximated as trapezoidal as shown in figure. The unit hydrograph refers to catchment of area

• A. 138.24 $k{m}^2$
• B. 0.0384 $k{m}^2$
• C. 384 $k{m}^2$
• D. 3840 $m^2$

Answer 1

The correct option is A 138.24 $k{m}^2$

We know that
Area of UH = Catchment area x 1 cm

$\left(\frac{4+28}{2}\right)\times 24\times 3600=A\times \frac{1}{100}$

$A=138.24k{m}^2$