144 lines
6.1 KiB
Plaintext
144 lines
6.1 KiB
Plaintext
are dug pul lp base and clayeblkd pr lalpeked by
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verpeal plasllr parrrers sp lhal lherrwaler lar Mad) alsp
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llows rnlp rhe rnlereeplpr drlehes, rrrd lherree lp
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slrearns, ur lrprn uphrll drrrh areas VI: prpes lp dams pr
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slprapes Waler rs then avarlable la slprk and wrldllle as
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waledlples where np sueh souree pl lreslrwaler al head
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preyrpusly ekrsled lvrpsl seepage npws perur al less
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lhan 1 rn depth. her deep sand searns lo ll rn depth ean
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be dug cm by paek—hpe and lllpelred by uerlleal plasrrs
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sheels purred in a day hnkfill Sand rearns are deleeled
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by backhoe dlggms, radar [mm salellue, pr lpeally by
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dowimg. WM" banks are rpnslnreled, as rnany pl these
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deeper seepages as ppssrhle are hlpeked. lzssumls
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surlaee Revise lawer ln lhe ealehrnenl where lrre
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shafluw aqurlers drsclurge ln elleel, seepage eprnes lap
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slandsllll.
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peep sands pr pld dunes dp npl rpllapre lllley are,
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aller all, up rp m. srlrea sand eralasl bul lrrsread ael as
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nesllwaler lanks", saline an lne landseape and seeprng
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slowly l-rprn llrerr laase. lnlereeprpr d ns dpwnslrrpe
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h-mn smh sandy areas rernarn walrr- led wrln l-resh
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warer as eanals all year, and are very aflnuwa lp
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wmariawl, srnall lrsh, and waler planls The rnreresplpr
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hanks rul all lresnwaler seepage warer lrprrr lhese, and
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also lrpnr sall lakes pr danrs lhal lre above valley larner,
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direelrng rl harmlessly la strum and "ms prevenlrng
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l.ne wlrrler flooding pl surlaee splls SIR lakes ean have
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early wel.seaspn llppds dryerred arpund lnern, and
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pnly laler l-reslr mm)” walers are druerled lp lrll lllenr
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ln lhrs way lhey beeprnesurled lp nsh and walrrlrrwl
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The penelrml elleels pl rnrerreplpr banks are rapldly
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eyrdenr dewnslppe Wlnd erpsrpn and llbpdrnrr ln rnlns
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(eases on ennslnrelrpn Craps regarn healrh, lerrrlrsers
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are no lpneer washed away, dying rrees muVeL and
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new rrees ean esuhlnll lllrey pllen appear an lhe banks
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sppn aller mnslmumm Lnngdeml srrrl remvery and
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gnuy ellnnnarrpn ran, however, lake up ln in years pl
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earelul husbandry Treelrnes 5-8 nees wrde Maw each
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bank slpps lhe dryingvm ellesl pl rhe deserl wrnds,
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and elrrrunales wrnd erpslpn an llre fields The uphrll
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srde pl drlelres are lell Inc 0! bus ur ease nrarnlenarrre
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rs needed
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l rannpl m'elsm‘ss me rrnpprranee, lo every rppnlry,
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nl llns melldesmd peesenl apprparh lp sell and warer
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epnserualrpn. and lhe mMequem reversal plsall scalds,
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gulhes, and desenifimnflm ln hard easn rerrns, lhe
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larrners l spoke wrln rn Wesr Auslnlxa esbrrrare lhal m
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57 years, (ash relurns lrprn rnrreased llvealpek and
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rrpp yrelds pay lar all llle earlhwprk
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We epuld all help by rnveslrng rn sueh peneneral and
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rernedral wprk lhar salkalfllned larrners lhernselurs
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may nrrl be able to allprd We might also rnsrsr llnar prrr
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gnvemmenl (Duh/(SB rn llns work. as rnurll purre land
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has been lasl re sall lnan we ran ever replare, ll we are
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ever lp pal prrr eepnrrrnre pnprrlres nghl, lnrs ard ln
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prerenung sall rnusl lake pmcdme aver \houghlless
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rnvesrrnenls rn lhe srpek rnarkel and real rsrare lrelds
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lhal deslrpy real weallh merely lp rnake money We
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rn sl rplleue lhe pressure on lhe land lhal eauaed lne
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rpllapseplmlr rural sprls rn lhelrral plaee
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rRls
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Dryland salfing rs alrrlhuled lp rlsIIIg grpundwalers
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dernred l-rrrrn delprerled aquxkts rn Vlduna; spnle pl
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lhe deep rand aqurlera sampled epnlalned very ralry
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waler (ammo—42,000 ppm), rreh rn iron, and uldles
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Where rlrese eyenlually surlaee, lsllxloo pprn sall rs
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passublr in llgmns pr creek ”(pips Alluhm him-
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slune aqulkls may have less spdrurrr sall lpns law-sow
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pprnl and ran supply domefllt prslpek when ln nrany
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areas pl Vrelpna and inland Auslraha, waler lables are
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ln any ease high, and rl lhese deep leads drsellarse lrrrp
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lherrl, sall L5 npl lar belpw lhe surlase Here, ll» answer
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rs lp veskne lpresls ln lhe hrlls and plarns
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wnrle lrle drains and pnmpm; pan kdnu wellarld
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sakmg, dryland sallrng yla aqurler drsellaree ls lbp
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Inge a prpplern la salve by rnesllanlral purnplne l( ls
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clearly eyrdenl lhal country under lures: (m rhe sarne
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areasl ls nnl ralled, ll ls rhe agnruhural elearrns and
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wppd4hrpprng, ur nel lpresl loss, lhar ereales sall
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desens
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ln Vrelprra, rnlereeplpr banks have npl been wrdely
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' led, and sell eallapse ls npl rnvbked as an
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expl-nihm lpr lhe hrpadseale sall mpasu llral are
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phvrpps abpve lhe sealed pr rernenled 'B' horimns pl
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«he sprls, and lhal ereale sunken pllslrearn sall lakes al
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lhe lppl pl slopes
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ln drylands, any rrse ln waler lalale pr eprnpaerrnrl pl
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so“ ean he laken as a warnrng pl sdlhng danger Suva
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laee rrldreaurrs are brpwnlslr palehes pl sea barley
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prasslllnrdernl murmumm} and pueklhprn planlarn
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llwlrrrlrxp rprnpprrsl Cnrps lpse vigor. and lhe subsprl rs
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salurared and anrembre
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M a gmndwaler level pl l a rn 0! so, raprllary soll
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aeupn lakes peer, and suelace rvapprallpn pl sprl warer
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ereales sall tms|s relllpreseeneesl Silled areas rhen
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spread uplnll. rushes evalve rlrrru- l. and bare sprl
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areas rnereare ln Wesr Auslnha. lhe uphrll spread rs
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allrrpuled lp lhe dammmg pl grpundwaler flow by
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lnwer areas pl callapred sprls We: years eearerlrale llne
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prpblern. wllrrll does npl neeessarrly reeede rn dry
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years.
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n ls pbylpus ural evrlgmn rrees, lransprnne mare
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waler llran erpps, keep llre warer uble dawn and pee
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per leaner rarn rnlrllrarlpn and sprl pore spaee A! lhe
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sarne rrnre. rpresls rn drylands exerele sal:s which
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aeeuanalale rn surlare sprls. and u as lnese salls rlral are
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lurlher reneenlrared by sarl epllapse ln llre Wesl
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Aeslralran sprls, pyer granlles and gums“: areas, sall
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reserves lp 20 m deep are mu lrl lmxl l/ha, and rnpsl
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bl rhrs lres belpvv 2 an, pr heldw lhe lpresl rppl eprle ln
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Vlrulrra, basall eap solls are 50nd lnhllrauon alpas
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Rarnlall rpnrarns sln pprn sall, derlved lrprn llre
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mm pprn pl seawaler San Lonkm lalls oll rnland.
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and rarn deppsus 274w kglha/yux rn Vrelpna ll
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wnuld lake 100,000 years al 59 kg/h; lp llnrld up rhe
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sprl sall levels npled [or vvesl Aush’allm Sale lpss by
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srreanr flow (mnmng rp seal dbom equals llral (Dining
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in as rarn llrenre " yclK‘ salel. hue where areas are
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tar-erred, sall levels rn sueaprs ean be 20 hrnes nrgner as
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epnnale sall rs rnoprlraed by groundwalers and sprl
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407
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