Input
- headLevel: input water level. Can be equidistant or non-equidistant.
Coefficient set
- pUpValue: height of weir
- width: width of the crest.
- sSlope: slope
- dischargeCoefficient: weir discharge coefficient (default is equal to sqrt(g)).
- energyHeadCorrection: if true energy head correction is taken into account (default is true).
Furthermore, one to three crests can be defined. The first crest is mandatory and only contains the relativeLevel attribute. The second and third crests also must contain the width attribute. User has the choice between entering one of the following:
- singleCrest: to define only crest1
- doubleCrest: to define crest1 and crest2
- tripleCrest: to define crest1, crest2 and crest3
Output
- discharge: discharge of the weir.
Description
Calculates discharge of a triangular profile or Crump weir according to the following formula:
Parameters:
- P = height of weir or height of vertex above bottom
- b = width of weir opening of width of triangle
- h1 = upstream water level
- H1 = upstream energy level
- h2 = downstream energy level
Q = Cg . Cd . b . H1^(3/2)
Cg = sqrt(g)
Cd = 0.633
The modular limit h2/h1 = 0.75.
If this value is exceeded a missing value will be entered for the discharge. Further limiting conditions are:
P >= 0.06 m
b >= 0.30 m
h1/P <= 3
b/h1 >= 2
