Page 14 - Hydrogeology Principles and Practice

HYDA01 12/5/05 5:44 PM Page xiii

Symbols and Abbreviations

Multiples and submultiples

Symbol Name Equivalent
T tera 10 12
G giga 10 9
M mega 10 6
k kilo 10 3
d deci 10 −1
c centi 10 −2
m milli 10 −3
m micro 10 −6
n nano 10 −9
p pico 10 −12

Symbols and abbreviations

Symbol Description Units

[–] activity mol kg −1
−1
(–) concentration (see Box 3.1) mol L or mg L −1
A area m 2
A radionuclide activity
AE actual evapotranspiration mm
ASR artificial storage and recovery
(aq) aqueous species
atm atmosphere (pressure)
B barometric efficiency
BOD biological oxygen demand mg L −1
Bq becquerel (unit of radioactivity; 1 Bq = 1 disintegration per second)
b aquifer thickness m
2b fracture aperture m
C shape factor for determining k i
C specific moisture capacity of a soil (m of water) −1
C, c concentration
°C degrees Celsius (temperature)
CEC cation exchange capacity meq (100 g) −1