The drainage area of a watershed is $50 \mathrm{~km}^{2}$. The $\phi$ index is $0.5 \mathrm{~cm} /$ hour and the base flow at the outlet is $10 \mathrm{~m}^{3} / \mathrm{s}$. One hour unit hydrograph (unit depth $=1 \mathrm{~cm}$ ) of the watershed is triangular in shape with a time base of 15 hours. The peak ordinate occurs at 5 hours. The peak ordinate (in $\mathrm{m}^{3} / \mathrm{s} / \mathrm{cm}$ ) of the unit hydrograph is
(A) 10.00
(B) 18.52
(C) 37.03
(D) 185.20
The drainage area of a watershed is $50 \mathrm{~km}^{2}$. The $\phi$ index is $0.5 \mathrm{~cm} /$ hour and the base flow at the outlet is $10 \mathrm{~m}^{3} / \mathrm{s}$. One hour unit hydrograph (unit depth $=1 \mathrm{~cm}$ ) of the watershed is triangular in shape with a time base of 15 hours. The peak ordinate occurs at 5 hours. The peak ordinate (in $\mathrm{m}^{3} / \mathrm{s} / \mathrm{cm}$ ) of the unit hydrograph is
(A) 10.00
(B) 18.52
(C) 37.03
(D) 185.20