Dimension | ||
a | baffle spacing (measured along bed) | L |
b | clear width of fishway opening | L |
B | overall width of fishway flume | L |
b | opening of V in degrees | ° |
C | coefficient | - |
d | depth of flow (measured above the lowest point of the weir perpendicular to bed) | L |
D | depth of flow (measured from bottom perpendicular to bed) | L |
g | acceleration due to gravity | LT-2 |
h | head over the weir crest | L |
ho | mean depth of flow at the weir | L |
k | height of upper part of bottom baffle | L |
k’ | height of lower part of bottom baffle | L |
K | average height of bottom baffle, equal to k/2 + k’ | L |
L | pool length, length scale | L |
n | number of observations | - |
p | percentage deviation, p = ((Qmeasured−Qestimated)/Qmeasured)*100 % | % |
pm | mean percentage deviation | % |
P | the height of the weir measured from the bottom to the lowest point of the weir | L |
Q | discharge | L3T-1 |
Q* | dimensionless discharge, scaling factor for discharge | - |
sD | standard deviation of the percentage deviation p, sD = (Σ(p – pm)2/(n – 1)) | % |
sE | standard error of the percentage deviation p, sE = sD/n | % |
S | slope | - |
S0 | bed slope of fishway | - |
t | depth of flow below the weir measured from the weir crest | L |
t | test statistic in Student’s t-test, t = pm/sE | - |
T | time scale | T |
v | time-averaged longitudinal velocity | LT-1 |
V | mean velocity at a cross section | LT-1 |
v* | dimensionless velocity | - |
x | distance | L |
x* | dimensionless distance | - |
y | normal distance from the datum | L |
yo | normal water depth | L |
y* | dimensionless normal depth | L |
Y | normal depth, normal distance from the bottom of fishway | L |
y | baffle angle in Denil fishways in degrees | ° |