The relationship between specific yield specific retention and porosity is ______

The area of the drainage is expressed in ______

The value of C is taken as ____ for bitumen pavements.

The longitudinal drain may be provided if the cross slope is more than ______

The factors not affecting run off is?

The number of important factors for highway engineer are _______

What is the minimum diameter used in pipe culverts?

The loss of water from leaves present on embankment is called ______