Share
 
 

Latin and Greek character reference

Latin Alphabet

A Area (m2)
c

Concentration - particularly chlorine(mg/l)

C C-value for a pipe (Hazen-Williams formula)
D Diameter
ds Inlet diameter
dp Outlet diameter
dt Time interval (s)
e Specific consumption of electric energy (kWh/m3)

g

Acceleration due to gravity (9.80665 m/s2)
H Head - elevation of HGL
HGL Hydraulic Grade Line
Hp Pump head, or 'lift'
k

k Chlorine decay rate (day -1)

K Unit resistance of a pipe
k h Demand/load factor
L Length
Mld Megalitres per day
n Rotational speed of pump (rpm)
P Power (usually electric power) (kW)
p

p Local pressure (Pa = N/m2)

Qdem Water consumption (demand)
Qlos Loss of water (usually due to leakage)
Re Reynolds number ( = vD / u )
S Valve opening (%)
t Time (hh:mm)
T Period of time (s)
v Flow velocity
V Storage/Volume
x, y, z Coordinates
Z Elevation (of ground, or bottom of a reservoir, etc.)

Greek Alphabet

χ

Local (minor) loss coefficient

η

Efficiency (%)

λ

Friction coefficient (Darcy Weisbach formula)

υ

Kinematic viscosity (m2/s)

ρ

Density (kg/m2)

ρ

Angular velocity (s-1)

ω

Phase angle between voltage and current applied to a load. (Cos φ = Power factor)

Was this information helpful?