A | Apex width; |

C | Discharge coefficient; |

g | Acceleration constant of gravity; |

h | Depth of flow over the weir crest; |

H | Total upstream head measured relative to the weir crest; |

H | Headwater ratio; |

l | Centerline length of weir sidewall; |

N | Number of labyrinth weir cycles; |

P | Weir height; |

Q | Discharge over weir; |

V | Average cross-sectional flow velocity upstream of weir; |

Wc | Channel width; |

w | Width of a single labyrinth weir cycle; |

L | Total crest length of labyrinth weir; |

L | Total crest length for a single labyrinth weir cycle; |

R | Determination coefficient; |

t | Weir wall thickness. |