GEO_geometry_wlprism(): Width lenght of a prismatic open-channel

About:

Calculate the width lenght of a prismatic open-channel.

©WETpython, 2015

\begin{equation} W_l = B + m_l \times y + m_r \times y \end{equation} 

This function is a applied to trapezoidal, triangular a rectangular sections:

for a trapezoidal section: $B \not= 0, m_l \not= 0, m_r \not= 0$

for a triangular section: $B = 0$

for a rectangular section: $m_l = m_r = 0$

Module: Geometry

Function: GEO_geometry_wlprism(y, b, ml, mr)

Parameters:

• y, flow height, m;
• b, channel bottom , m;
• ml, slope of left embankment (1/ml);
• mr, slope of right embankment (1/mr)

Sample code:

from Geometry import *

y = 0.75 #(m)
b = 1.5 #(m)
ml = 1.5
mr = 3.0

wl = GEO_geometry_wlprism(y, b, ml, mr)
print ("Width lenght:", wl,"m")

Result:

Width lenght: 4.875 m