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chy—lonms il ioiodlied rn ar 57 ein ( irieliesl deep
and rolled down, However, il isexperis and doesni
always woik Ceineni arid (amping plus sprinkling
flush! oe prdtmble, ur a oiluininous spray an be
rolled rn nlier ulling ln rluy soils, sali or sodium
moonareean nayernesaine cllcd
EXPLOSIVES m sorneiiiries used (a eorripaei iris
jxdci oi lull danis, arid eunsisls ol lhmwlng in a 3x;
slieli charge oldyruniiie. This works well al nines, bnl
u dingemi il you own a ielrreuer, or ii liie doiri wall is
poorly eoinpaeled ioslarl wim,
CLAY is expansivc il ii los lo be med in, our ii is
oleen used [0 seal dams near n elsy poekei Tlie elav is
spiead and rolled 2340 (m 9-12 ineliesl lhick over
suspeel arnus
IMPERMEABLE MEMBRANES ean oe ol welded
plaene, neoprene, or even poured eonereie lrnpenne
alale membranes are loo expensive In use on any nul
Crlllcal dorris, wnieli inay niean a guaranieed warer
supply to: house 0! louder. in very porous aieas. Usmg
membranes enables banks [0 be sleeper no any
orlier eorilieonipaenori or gley sysieni, so run more
wnier ean be lined inlo sinaller spare. li is nol
oioloeical- unless a sand oi lopsoil lloor is also added
over me sealing layer, when lisn or planls ran on
odded.
Eanh slorape is now llie elyeapesl, easresi, and niosr
locally sell-reliani nieinod ol waler eonseryalion
Unless balk eilies and larnis use such ineiliods. elean
wit" will deservedlv oeeonie known as me worlds
raresi iriineral, lllrhealm will lae peipeluaied, and
droughts and lloods allke lseeorne roininonplaee None
ol lliese are neeessary,
Cans vary preailv, as a mush guilds, waier sloied in
soil and nurnus rne elieapesl and ol giearesl yolunie,
surlaee dams nu! eliespesl, nnd runks denr, bu| srill
niueli less expensxvr llisn piped wnier [mm rnains
supply l ean only urge all people ol guodwlll lo
prornore, iund, and mvesigMe waler and waier
smrage, warer energy and waler elea ess. as me
elilorinaied, nielallie, asbesloslilrred, porsonous waier
ol mndun eenrralised svsreins is prudneing sueli
epideniie disease an riess n. eaneer, bone marrow
(adore, and gasiioinresiinal disorder
[I n 22,500 l mnk rosrs 2n uriirs ol inoney, llie same
uniis in a sensible ealli sloraee peys lor 2500,00 l, or
spool m0 nines as inuen warer, Up Io moon—2,500,000
l links Eel eneaper, as less eoriereie is used lor niore
waier Thai is, a \axge hank is ieladvely cheaper ilian a
small lank Abnvc 2mm l, sueli mnlré are usually
poured on sile, oelow iliis, iliey ore earled lioin a
eeniral minuliduring sire
Dams, in eonlrasl, begin lo eosl rnoie as in. lieigyil oi
llie wnll rises Abom .1 rn (in feel) ol relainine wnll is
in. liiriii oi eneap dams Above ilus, eosrs rise iapidly
as greaier skills, inoie expensive and inassiye norenals,
inore eornplex eorilrols ol levels, and niueli gnaltr
enyiioni-nenlal rlsks rukeineir loll
As nored, elieap waler in dains depends on llie
enoree ol sile, so chm very low dsnu or. welleeleered
sues impound zo-lw nines inoie waier lhan llie some
enirri used on sleeper sires, wneie every unii ol eanli
rnoved eounls u uml ol waler However, eyen earili
ranks enavalzd oelow grade are a| Dnhlevmh M pdee
of eoneiere ranks above yidt
wnere aie links, inodesl danis. and mive dnnis
applapnine7 Tanks are dppropriole on isolaied
dwellings, in llallonds, arid everywhm in cross and
urbanised areas Dims of lroin 22,500 ro l 5 M) are per:
ouill on any good sire in eounlry ond parkland aieas
Massive dams are appmpriale liaidly anywhm our lhe
llne roskeoerrned or elneialed uplands ol solid and
loiesred hllls, sumeei lo low eurlnoualre nsk and died
only lor inodesl doineslie \nm dirry iridusuiall power
generanon
TANKS
Culmnl arid liisiorieal pmzdzm niay deierrnine liow
earlli is moved and used, or even it ii an be iii/owed or
all. Thus, an Australian aeeuslonied lo a greai vai-iery
ol surlaee slorsee, in aslounded lliul iliere .re no
scnzmilc or CDSTS FDR DAMS AND YAMKS
Sienna MB rod mu m nines lie oosi M dams 1mm same
:Mum ul will! sored: mn—sin rem-unis lor mm are anen
o
’° EARTH DAMS ‘° TANI6
n * 4,
. . ,s s rr s r , ,, ,
neunzm m” “*9" (“Mr”) ’— olrea fizz» Elude!) 3
165