CVG 3116 Lecture Notes - Lecture 7: Manning Formula, Hydraulic Jumps In Rectangular Channels, Hydraulic Jump

• School: University of Ottawa
• Department: Civil Engineering
• Course: CVG 3116
• Professor: Rozalina Dimitrova

Document Summary

Discharge can be found using the manning"s equation: A is the cross section area of the flow. Specific energy is the energy of the flow referred to channel bed as a datum (z=0) in the energy equation. Where: q is the discharge per unit width (q=q/b) The critical depth (yc) refers to the depth corresponding to the minimum specific energy. Bc is the channel surface width at critical depth. Ac is the channel cross section area at critical depth. For a given specific energy, two depths are possible (alternate depths): one is supercritical, the other is subcritical. The froude number can be used to determine which depth it is: Special application of specific energy: rise in the bed channel ( z) If the local bed rise is greater than zmax (chocking), the upstream depth has to increase. Special application of specific energy: contraction in the channel width.