The Hydraulic Jump’s neck

The Hydraulic Jump’s nose

The Hydraulic Jump’s inlet

The Hydraulic Jump’s tail

A balance of the specific forces

An unbalance of the specific forces acting upstream to hold the jump in position

An unbalance of the specific forces acting downstream to cause the energy loss at the jump

A balance of the specific energy

upstream rapidly

downstream rapidly

In the direction of the unbalanced force at a velocity dictated by the relative magnitude of the unbalanced force

Rapidly up and down as an oscillating jump

“X” – Sequent Depths “Y” – Force balance equations

“X” – Subsequent Depths “Y” – Force balance equations

“X” – Subsequent Depths “Y” – Energy balance equations

“X” – Sequent Depths “Y” – Energy balance equations