A

Apex width;

C_d

Discharge coefficient;

g

Acceleration constant of gravity;

h

Depth of flow over the weir crest;

H_t

Total upstream head measured relative to the weir crest;

H_t/P

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_c

Total crest length for a single labyrinth weir cycle;

R²

Determination coefficient;

t

Weir wall thickness.