channel_geom {rivr} | R Documentation |
Compute geometry relations for trapezoidal channels.
channel_geom(y, B, SS)
y |
Flow depth [L]. |
B |
Channel bottom width [L]. |
SS |
Channel sideslope [L L^{-1}]. For a rectangular channel, |
Channel geometry relations are routinely calculated in numerical solutions of steady, gradually-varied and unsteady flows. This function is used extensively by internal procedures and is made accessible to the user for convenience.
Named vector:
A |
Flow area [L^2]. |
P |
Wetted perimeter [L]. |
R |
Hydraulic radius [L]. |
dAdy |
Water surface width [L]. |
dPdy |
First derivative of wetted perimeter w.r.t. flow depth. |
dRdy |
First derivative of hydraulic radius w.r.t. flow depth. |
DH |
Hydraulic depth [L]. |
ybar |
Vertical distance from water surface to centroid of flow area [L]. |
channel_geom(1.71, 100, 0) # rectangular channel channel_geom(5.79, 6.1, 1.5) # trapezoidal channel with sideslope 3H:2V