Territory Stories

East Alligator district centre water supply assessment : Kakadu National Park



East Alligator district centre water supply assessment : Kakadu National Park

Other title

D . Pidsley


Jamieson, M.; Pidsley, D.; Paiva, Jerome


E-Publications; E-Books; PublicationNT; Technical Report ; 26/1991




Made available via the Publications (Legal Deposit) Act 2004 (NT).






Water-supply -- Northern Territory -- Kakadu National Park; Groundwater -- Northern Territory -- Kakadu National Park; Kakadu National Park (N.T.)

Publisher name

Power and Water Authority

Place of publication



Technical Report ; 26/1991


1 v. : ill., maps ; 30 cm.

File type


Copyright owner

Check within Publication or with content Publisher.

Parent handle


Citation address


Page content

Technical Report WRD91026 Viewed at 15:07:48 on 29/07/2010 Page 99 of 107. ., . ! , .~ " 1 t $,nQm_nnq Can~Nf1t:. O.twtn MIIV 11 ns. 1987 Extreme Corrosivity of Northern Territory Coastal Groundwater !iupplies - Origin, Effects and Materials of Construction A.R. MARKS Chief Engineer PubHc Works. Nonn.rn fetritory OelJal1ment ot TranSQOrt and Works P. JOLl.Y Pnncl~.,t S'nglnut$ Assessment Branch. Ware" Resourees Division, Nor..hem TerritOry Oepartm"nt of Mines and Enel'9Y The coastal st...-ip of Northern Territory,. Aust..."'3.lia,. has sort acidic grcund;.{acars '.whidl .are highly ..,.u;cYcsiVllt to ~per, brass, mill:} steel, galvanized. iron, asbestos cerent. and ctm!nt lined pipes and fittir.gs, and other hydr3Ulic catQOnents~ '!he cause of the corrcsivit'! is acidity" aris~ fraa. dissolved CO, believed to originate fran the high CO2 respiration rate of tree and plant roots i.n ttl!! aquifer ':'eC1arQe areas dlrirq th.e 'Net season.. 1he lntrodu~ion of cort"05icn resistant materials of constr.lCtion is mt1.ined as tt'l.e preferred cption to ..,.rater t....~at::rent ... Al.zros:t all camunities in the ,S(,rt..'1ern Territorl rely on qrcundwater in t.!oJ.e ema of oores or permanent sprin:,;s .JS their pri.'"tIar'l sc:urce of supply.. '!he ext:e9tions are ll!I.rwin,. lat."lerine" .tcd /Igtll<urr (llq>e.- Ri"".-) whim have surface catC'men.t supplies 1-n.th minor supple:rentation fran bores. '!he 1.lndI!!rgra.md watf';r rua.:=o;3 C t.'1e Territor,! V'Ar/ qreatly in quality,. gene-rally havin; lew to ;nary lew JUine:cal.iution in the m::msconal areas to the north wit..'1 increa.sirq min&l':'alization in the temperate an:! desert: inland ra;ri".,.. to the 5O..l t.'>. '* ~ .. '!'() .AWe! "SPRi.';S -AU. ~1-6( ...... ( !M.<;Ur'O 1 !i>rthern Territor{ ",,,,,,tal toms -.i t:I\ hiQ1l.y c:orrmive ll%K2:tgram<i vatElr scw:ces Corrcsivity of the waters is 'J."lriable tut al~ the coastal ,/i:OJ..n.d'...ater a.:pp1ics are highly cocrcsive.. 1'WenJ:t/ one .:rain "'-""A!Stal camunities and nurrerOJ.$ small Oltscaticns ~.....sin;;: a pc:pulacion of .".aM J.2,OOO (9t of the Territor!) are involved as shewn in Figure 1. Suoolies to Alyarq.t.!.a ar.d Angur~ are dt-emical.ly t~-3.t.ed to rOCuce the corrosive ci1aract'.er::'<:I.ticsf' and aerat:ion orovides D3rti3l treabre~!C at ~tu .. J.Uf'b:'y" Afl of t.."":e ota'1er suppli;"""s are rel:l.cul.at..o:d witi'lCtlt. condit.icning" treattwtnt.-5 In 1983 t followinq incidents of high -water -use and ="'" of plumbing cor:oding cut 50 r.:;pidly that hOlSes cculd not be nei...,tained in an habit:.able condition, the Cep.act:tent of Trarb';'Ort. and 1Io~ engaged '!he Nstr31.ian Mineral Oavelccment Laboratories (}Ol1DEt.l of Oleens.1a.nd to invest.igate t.."le problem. !he consultant o::!ncluded thz:...: failures were cccurrin; on a :rassL.'e scale to an extent: un.knc:Mn e iser.omere in Aust.'"Ollla.. and that the high failure rate of ccpper pipe # brass fittings arxi hot water systsrs resu..i.ted f::'OIl. the high corrcsillity of the soft, acidic bore ...raters (AMIEr.., 1984) .. In addi~ion to house plumbing i~ has been otse!:Ved that: galvanized iron and as.best:C6 cement retiOJ..lation :naif'S, brass tapping fer:ules and asscciated. fittings,. galvanized iron t.anks, mild steel bore casin;; and co.il..:mns, and. ~ CO"I'{:Onents are attac~ed. Corrcsivicy ~ a 'Mater may be defi.~oo all the ?Jtential or ability of :.. .... ac water to dissolVtt mat~rials of ccn5t..."'"tlction.. Ccrrcsicn is a physic:::l....,...:..erucal act.ien rela.ted to the characteristics of the A'ater and mat.erial of const.:"..lction. Wat.ers beo::r.e ;rore disro.i.ved oxy.;en, _ol .. ::Slve .. It..>-::. dis-sol'led car.bOn increasin; dioxide,

Aboriginal and Torres Strait Islander people are advised that this website may contain the names, voices and images of people who have died, as well as other culturally sensitive content. Please be aware that some collection items may use outdated phrases or words which reflect the attitude of the creator at the time, and are now considered offensive.

We use temporary cookies on this site to provide functionality.
By continuing to use this site without changing your settings, you consent to our use of cookies.