An open channel flow is the movement of a liquid, like water, in a conduit that has a free surface exposed to the atmosphere. Unlike a pipe that is completely full, open channel flow is driven by gravity, and the top surface of the liquid is not under pressure. Common examples include rivers, streams, canals, and storm drains.
Geometries
General parameters
|
Unit system |
Q flow |
| g gravity |
b channel base |
| z1 left side slope |
z2 right side slope |
| So channel slope > 0 |
n energy loss coefficient |
| α kinetic energy correction factor |
ρ fluid density, rho |
HEC-RAS modeling
| l channel length |
z ground level |
| Rcx river start x-coordinate |
Rcy river start y-coordinate |
| Tb flow duration (hours) |
Ts flow time step (minutes) |
| Tpp % time to peak flow discharge |
Numerical method parameters
| y1 min high channel to eval |
y2 max high channel to eval |
| Steps iterations |
