Territory Stories

Waterloo Station : a report for the station manager



Waterloo Station : a report for the station manager

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R. Sanders and L.R. Rajaratnam; Water Resources Survey of the Western Victoria River District. Waterloo Station. A Guide for Water Resources Management.


Sanders, R.; National Landcare Program (Australia); Rajaratnam, L. R. (Lakshman); Northern Territory. Power and Water Authority. Water Resources Division


E-Publications; E-Books; PublicationNT; Report No ; 24/1994




Waterloo Station


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


Date:1995; On cover 'National Landcare Program'. Cover title: Water resources of Waterloo Station. Bibliography: leaf [10]




Groundwater -- Northern Territory -- Waterloo Station; Water-supply -- Northern Territory -- Waterloo Station; Water resources development -- Northern Territory -- Waterloo Station


Report No ; 24/1994


[15] leaves : illustrations (some colour) and maps (1 colour) ; 30 cm.

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predict where interflow zones will occur due to the way in which lava flow morphology varies over short distances. However by siting bores on geological lineaments it is more likely that fracture zones and potential recharge pathways will be intercepted. In this situation any interflow zones that are present are more likely to contain water supplies. On Waterloo there has been about an 80% success rate for properly sited bores, drilled to 80 to 100 m, yielding greater than 1 L/s from the Antrim Plateau Volcanics. Many of these bores have been sited on geological lineaments and " T " junctions in creeks. Lineaments interpreted from aerial photographs or satellite images are recorded on the hydrogeology map. Although this map does not record all lineaments on Waterloo Station it is reasonably comprehensive and can be used as a guide for selection of areas for bore drilling. At the eastern limit of the basalt country groundwater is often lost as springs from the escarpments, and the unit is relatively thin (Figure 3). The number of potential aquifers are fewer and likely to be drained. Hence drilling should not be undertaken closer than about 2 km from these escarpments. During the 1993 investigation bore RN 28906 was located on the regional scale West Baines Fault. Various aquifers were intercepted. The first, a shallow weathered zone at 35 to 38 m yielded 1.7 L/s, and this increased to 6 L/s due to inflows from fractured or interflow zones between 38 and 97 m. RN 28907 was drilled in the vicinity of Waterloo Homestead and was sited on a prominent "T" - junction on Bloodwood Creek. This bore intercepted about 9 L/s (airlift) of moderate quality (TDS 857 mg/L) water from fractured and weathered basalt between'22 and 24 m). This was in contrast to RN 7252, sited 300 m to the east and on no apparent lineation, with a yield of 2 L/s and a field measured conductivity of about twice that for RN 28907. The influence of structural lineations (in this case represented by the "T" - junction) is clearly apparent. The competent nature of the Antrim Plateau Volcanics allows for stable drilling using air/rotary techniques. Bores are commonly constructed with steel casing slotted adjacent to the aquifer zone. Steel cased bores have shown few problems with corrosion or siltation despite the existence of many old bores in the area. The aquifers of the Antrim Plateau Volcanics yield water of stock quality which, on Waterloo Station, is almost always suitable for human consumption. TDS values in areas of rapid recharge are generally lower, and water quality commonly more favourable. Analyses of the generally hard waters show a TDS range of between 300 and 850 mg/L (Appendix 2). Bore RN 5876 is an exception with a TDS of 1949 mg/L, and very high sodium (600 mg/L), chloride (220 mg/L), and sulphate (260 mg/L). The TDS