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cas
of spring
ground
Inundation water moving over t
be k
pt out of a certain locality by a surface embankment
if
wat
r moves underg
substantial underground embankment
r
con c
t
wall
r ing water and su r face drainage in hilly ground is caught
p
r t
and dive
d
h e slop
along t
The ditch intercepts
In cases where the sp
itself
only draining can meet the evil
swamp may be d
inc
courses
This is p
cours
in s uc
r
h e velocity of t h e cur r ent
to in c
ase t
occasionally applicabl
B y breaking through an impe r m
soil
so that t
H
r es
ere
rep
an imp
rmeable stratum
swamp to the lowe
TI ON
R
LAMA
ater or surface drainage coming from highe
by running a ditc
of the hill j ust abov
r ing is situated in the swampy ground
r ained
r easing
g
r acticab
h a case
h e wate r can filter into
nts the water
r pe r m
h e surface of the land may
r ound
it can only be stopp
h of suitable dim
wat
r and lead s it past the swamp
r adient
h
h e latte r pu r sue
e w
n t
r se may be st r aigh t
cou
and
the channel leading f
r atum
able st
I L
O
such as a stone or
h e swampy ground
t
h
idt
n
h e method is only
T
abl
stratum in t
subsoil
r m
pe
able st
r
d by a
nsion s
winding
d
so as
h e
r ata
and
r om the
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