The Head Existing On Top Flow Line Is

By Aina Parasher|Updated : July 12th, 2022

When seepage takes place through the body of the dam, the head existing on top flow line is

  1. Datum head 
  2. Elevation head
  3. Pressure head
  4. Datum head + elevation head + pressure head

Answer: B. Elevation head

When seepage takes place through the body of the dam, the head existing on top flow line is the elevation head.

Solution

When seepage takes place through the body of the dam, the phreatic line is the topmost flow line. The profile of the phreatic line is parabolic.

  • Along the phreatic line only atmospheric pressure is present. 
  • At the intersection of the phreatic and equipotential line, the pressure head is equal to zero.
  • The head existing on top flow line is the elevation head as the pressure head is zero and velocity head is neglected.

☛ Related Questions:

Comments

write a comment

Follow us for latest updates