These are the most frequently used words in another edition of this book.
1994
1997
1999
2000
above
acid
acidity
active
al
alkalinity
aquifer
area
below
between
cases
coal
concentrations
conditions
dam
deep
design
dewatering
discharge
dissolved
during
equation
et
example
fe
figure
flow
form
given
ground
head
high
however
hydraulic
hydroxide
instance
ions
iron
large
less
level
major
mass
may
means
metal
mine
mineral
mining
moles
occur
open
oxidation
passive
ph
pit
plants
pond
problems
processes
pyrite
quality
range
rate
reaction
rebound
removal
rock
section
see
site
sludge
solution
spoil
strata
stream
surface
systems
table
tailings
time
total
treatment
two
use
used
usually
values
voids
waste
water
weathering
wetland
workings
younger
zone