Question
Water Resources Engineering Question on Gravity Dams and Spillways
A homogeneous earth dam has a maximum water head difference of 15 m between the upstream and downstream sides. A flownet was drawn with the number of potential drops as 10 and the average length of the element as 3 m. Specific gravity of the soil is 2.65. For a factor of safety of 2.0 against piping failure, void ratio of the soil is ________ (rounded off to 2 decimal places).
Answer
The correct answer is 0.63 to 0.67 (approx)