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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APPENDIX 4 SITE INVESTIGATION PROCEDURE Having determined a catchment capable of supplying stock quality water for the required stock numbers, then site investigations must be undertaken to confirm that the proposed tank site is suitable. The site investigation guidelines presented here are based on a very useful booklet entitled "Design and Construction of Small Earth Dams" (Nelson, 1985). The key investigation method is to auger a series of investigation holes. In an excavated tank situation this underground exploration helps to: determine the extent of impermeable soils and the presence of any layers which are likely to have leakage problems; show if there is any rock (eg. shale) present with subsequent excavation cost increases (if rock is present an indication of its rippability must be determined); ascertain whether groundwater is present, and if so is it suitable for stock; provide information on the soils to ensure the tank sides will be stable. If an onstream tank is proposed then spillway conditions (if it is too sandy it will erode and wash away, if it is in rock excavation could be very expensive) will also require investigation. A hand operated 100 mm earth auger capable of drilling to between 5 and 6 m is the basic tool for the subsurface investigations. Auger holes are sunk in soil to lm deeper than the tank design depth, with minimum 500 g samples taken wherever there is a change in soil. A plan of the soil changes down each hole should be kept to compare variations from hole to hole. Excavated tanks require a minimum 5 test holes, one in the centre and the other 4 positioned at the mid point of each corner slope of the proposed tank (Fig. A5). For the modification of an existing waterhole auger holes are sunk at 50 m apart along the centre of the bed, and 100 m apart along the edges of the bed. The site for proposed excavation must fulfill 3 main conditions (Nelson, 1985): the loss by seepage must be relatively low; the sides must be stable; silting must not be excessive.