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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stock numbers to be watered for a whole year (stock numbers will be higher if the tank is utilised for only part of the year). This in turn is dependent on the carrying capacity of the paddock (usually varying between 200 and 1200 head, ie a requirement of between 3.3 ML and 19.8 ML per year when based on 50L per head per day). However it is found that for economical stockwater supply using excavated tanks that 600 head per paddock is optimum. The larger the captured by a and 3 km2 respectively, 10), using the catchment the more runoff can be expected to be tank. A catchment size range of between 1 km2 should supply between 400 and 800 head with 90% reliability (ie. for 9 years out of proposed offstream storage design. The basic design for offstream tank is covered in Figure 4, and dimensions of 120 m x 100 m x 5 m are recommended for stock numbers up to 800. A minimum tank depth of 5 m is required to allow for an annual 2.4 m water loss due to evaporation. Where the excavation is in shale, with little chance of erosion, the inlet batter may be increased to 1 in 4 to decrease the volume of material to be removed. The design of excavated tanks is covered in more detail in the report entitled "Waterloo Station - Surface Water' Storage Potential" (Report 57/94D). 4.8 Construction and Cost of Excavated Tanks Construction is covered in more detail in Appendix 5. Because of the proposed design construction is relatively simple. Excavated spoil can be dumped to waste or used to build a bund on three sides of the tank. A bund and/or wing walls on a hillside storage will generally increase the storage capacity of the structure. Excavated volumes are large for the proposed design dimensions (approximately 38,000 m3 for the proposed off stream tank) construction costs will be high. Cost will be influenced by ground conditions. The requirement for excavation of shale or remedial works (eg. provision of a clay liner) if necessary, will add significantly to the construction costs, but should result in a reliable water supply. The shale has been successfully ripped on numerous occasions using a D6 sized bulldozer. 4.9 Waterholes Natural waterholes are present in the Dry in depressions in stream and riverbeds. The available capacity of the waterholes could be increased by excavation of the base (Appendix 5), but only where site investigation proves that this will not result in leakage. A shale base, as is common in the West Baines inside and downstream of the Baines No. 1 paddock, could be excavated without fear of leakage. Waterholes in the shale riverbed on Bradshaw Station that have been deepened have been improved water storages, but require regular desilting.