Alice Springs town basin, review 2003
Read, R. E.
E-Publications; E-Books; PublicationNT; Report ; no. 42/2003
Made available via the Publications (Legal Deposit) Act 2004 (NT).
Department of Infrastructure, Planning and Environment
Report ; no. 42/2003
Check within Publication or with content Publisher.
384300 384400 384500 7375500 7375600 7375700 RN 003064 RN 003066 RN 003067 RN 003068 RN 003069 RN 003070 RN 003071 RN 003072 RN 007506 RN 011130 RN 011132 Figure 28 Bores in Heavitree Gap 5.9 Discharge across the basin 5.9.1 Flow out of Northern Zone Wilson (1958) estimated discharge from the Northern Zone as 5600 gallons per hour, that is about 220 ML/year. In the current study it was estimated as follows: Transmissivity, m2/d 200 Head difference, m 0.5 Length, m 190 Width of flow, m 600 Estimated outflow, ML/year 115 Pumping the Northern Zone at capacity will largely eliminate this outflow. Detailed modelling would be needed to determine the effects of this. 5.10 Evapotranspiration SKM (2001) designated evapotranspiration as zero, but also stated that the River Red Gums are groundwater dependent. Evapotranspiration was estimated from water balances, using data from 1996 to 2002, in Appendix G as E = 0.0687 V Where E is evapotranspiration in ML for any period. V is measured pan evaporation at Alice Springs Airport in mm for the same period. Since average annual V is 2374 mm/year, average E is 163 ML/year, that is it is four times larger than the discharge through Heavitree Gap. This is about 40 ML/year/km of the Todd. Evapotranspiration is probably also sensitive to water level, but this was not investigated. 44