Territory Stories

Estimation of Safe Yield from Alice Springs Groundwater Basin.



Estimation of Safe Yield from Alice Springs Groundwater Basin.


Forbes, C. F.


E-Publications; E-Books; PublicationNT; Report no. 9/1962







Publisher name

Northern Territory Administration

Place of publication

Alice Springs


Report no. 9/1962

File type




Copyright owner

Northern Territory Administration



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Technical Report WRA62009 Viewed at 06:02:18 on 18/02/2010 Page 27 of 79. " -20 that storago Stt tho beginning ()f 1957 w'ould bo in oxcess of the July'] 1957, ostimate" Ln oxamin.ation of the 1960/61 alld 1961/62 rainfall figures indicates that the ground water basin storage would bo loss thaD the 120,000,00C gallons cf the October estimate. ECl.ITil.1g regard to tho accuracy of tho figures 3,nd tho rninfnll })attorns;o tho follovling figures havo oOGn assUill~d for storngo; 1. ;'8.1:;(;:::' stored at the beginning of 1957 = 35~,OOO,000 gallcns. 2. 4~7<?,;tQr stcTod 2~t tho end of 1961 100,000,000 gnllens. iVithdraw8.1 fron storage = 254-~0001000 gallons. no 'prot once is :::n8dc that this figuro giv~s an.:lthing TIoro than a fairly reliable QotoITlination of tho ordor of the VJi thdr8,vv2.1 from storage:. l'Icthoa. 'rho method uscd to obtnin an ostiLJ.[l,tc of safo o.l1nMl yiolcl of the groundriator basin is the Hills Bathed, outlined by Todd (9). This wothod is not withcQt its dangors, especially in the smallor bns:"ns such as this ono ~ Tho doclino in groun.d.\v8.tor lovol is not enly a fLU1Ct ion of tho annu.al dr2.ught and tho 88.fo yield, bu.-t 3.130 of tho sha:pc and stor:l.gc char8.ctQristics -of tho basin .. For this bG.sin~ oVling to the sh'-:,po of tho 1850' CL'ld 1860' contours, those ,:ffocts ~,;iill probnbly be :nirly SE2.11 and it is proposod to disrct;:lrd thCD.

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