Correct Answer - Option 2 : Inglis formula
Explanation
Inglis Method
This formula is used only in Maharashtra. Here three different cases are taken into consideration.
\({Q_P} = \frac{{124A}}{{\sqrt {A + 10.4} }} \cong 123\sqrt A\)
where
QP = Peak discharge in m3/s.
A = Area in km2.
Ryve’s Method
This formula is used only in Southern India.
\({Q_P} = {C_R}{A^{\frac{2}{3}}}\)
Rational Method
This method is based on the principle of the relationship between rainfall and runoff. Hence, it can be considered to be similar to empirical method.
\({Q_P} = \frac{1}{{36}}k{P_c}{A^1}\)
Dicken’s Method
It was earlier adopted only in Northern India but now it can be used in most of the States in India after proper modification of the constant.
\({Q_P} = {C_D}{A^{\frac{3}{4}}}\)
