1. According to the shape of the abutment, define the coefficient of abutment K_{1}, using Table 1.

2. To determine the value of the coefficient for angle of embankment to flow K_{2}, use the following equation: *K*_{2} = (θ/90)^{0.13 }

θ < 90^{o} if embankment points downstream

θ > 90^{o} if embankment points upstream

3. Calculate the Froude Number Fr for the given data using the equation *Fr* = *v/(g.y*_{a})^{1/2}

4. Use the following equation to calculate the scour depth y_{s}:

(*y*_{s} / *y*_{a}) = 2.27 *K*_{1} *K*_{2} (*L*^{'} / *y*_{a})^{0.43} *Fr* ^{0.61} + 1

y_{a} = Given

K_{1} = Calculated in step 1

K_{2} = Calculated in step 2

L' = Given

Fr = Calculated in step 3