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Baniyala groundwater resource assessment 1990. Dlh-458



Baniyala groundwater resource assessment 1990. Dlh-458


Chin, D.; Jolly, P.; Rowston, P.


E-Publications; E-Books; PublicationNT; Report ; 58/1991




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





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Power and Water Authority

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Report ; 58/1991

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Technical Report WRD91058 Viewed at 15:07:51 on 29/07/2010 Page 10 of 107. Consequently in 1988, bore 25973 was drilled adjacent to 25333 as a replacement. The same aquifer was targeted and the hole was constructed with 72m of 152mm ND PVC with O. 6mm aperture telescopic screens from 75.4 to 77.7m. The bore airlifted 10 Lis upon completion but subsequently failed when test pumped due to the ingress of fines and hence was never equipped. In 1989 a rig returned to the site to rehabilitate 25973. An attempt was made to retrieve the screens but in the process the PVC casing was parted and the hole became unstable. The rehabilitation was abandoned and a new hole commenced some 5m away. This new production bore, 26534, is the current production bore in use and is constructed with 152mm ND PVC to 71.8m with 0.5mm aperture telescopic screens from 70.6 to 75.3m. Wi th the stability of inhabitancy of the outstation and it's growth into an emerging community, an emphasis has been placed on the securing of a groundwater supply for Baniyala. It was recognized that the current lone production bore supplying the community was not satisfactory and that an investigation and evaluation of the groundwater resource was required. As a consequence Water Resources Division commenced the Baniyala Groundwater Resource Evaluation Project in August 1990 with the following objectives : 1. Reassess existing hydrogeological data to develop a groundwater model of the area. 2. Investigate identified. and evaluate the groundwater resource 3. Construct two production bores into this resource capable of providing a reliable supply of 200 kL/d. This report documents the office study and field components of the evaluation, summarising and interpreting the results of the field data collected and providing recommendations for the sustainable utilisation of the groundwater resource and pumping of the two new production bores.

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