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
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D- 6 1975 This is the earliest available whole of basin monitoring (Fig.-D 6) after the extremely wet year of 1974. The basin would have been still full at that time. The Todd is not an obvious source of recharge, showing that extensive direct infiltration had occurred. Figure-D 7, showing the water level rise from the previous monitoring demonstrates this more clearly. The greatest rises in water level of some 5 to 6 m have occurred in the western part of the basin, compared to some 3 or 4 m near the Todd River. From this it is concluded that some 2 m of water level rise is due to direct infiltration. This implies that around 140 mm of rainfall became recharge in the period from March 1972 to July 1975. Surfer was used to estimate diffuse recharge in the Southern Zone as follows: Rises in water level near the Todd were about 3 m, hence it was assumed that rises above this over the rest of the basin were diffuse recharge. An increase in saturated volume of 9288677 m3 was calculated, giving an increase in storage of 650 ML. The assumed area of the Southern Zone is 5.3 km2, giving an average recharge of 123 mm. 383000 384000 385000 386000 387000 7376000 7377000 7378000 7379000 7380000 2/07/75 Figure-D 6 Potentiometric Surface 07/75
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