Territory Stories

Groundwater studies Ti-Tree Basin 1984-1988

Details:

Title

Groundwater studies Ti-Tree Basin 1984-1988

Other title

Peter McDonald

Creator

McDonald, Peter

Collection

E-Publications; E-Books; PublicationNT; Power and Water Authority Report ; no. 1/1990

Date

1988-02-26

Description

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

Notes

Date:1988

Language

English

Subject

Groundwater -- Northern Territory -- Ti-Tree Region

Publisher name

Water Resources Branch, Power and Water Authority

Place of publication

Alice Springs

Series

Power and Water Authority Report ; no. 1/1990

Format

1 v. : ills., maps ; 30 cm.

File type

application/pdf.

Copyright owner

Check within Publication or with content Publisher.

Parent handle

https://hdl.handle.net/10070/241901

Citation address

https://hdl.handle.net/10070/613711

Page content

own when water is returned with the airlifted sample, is sufficient to cause disaggregation. The hardness of the sandstone is related to the degree of calcification and silicification, both of which were present to a marked degree, frequently in association. It is appropriate to consider the entire saturated thickness of Unit TQt as an aquifer, containing horizons of various degrees of permeability. These horizons can be conveniently grouped as follows: a) silty sandstone, which forms, in terms of volume, by far the largest proportion of sample returns. This is porous (both intergranular and often tubular) but is not highly permeable. Yields exceeding 5 1./s were usually obtained from this material. b) the sand/gravel horizons which occur at various depths throughout the study area. These have a high permeability, but no discernible pattern to depth and spatial variability, and they are also difficult to accurately record in the strata log. c) the limestone/chalcedony horizons encountered in the east of the study area are invariably highly permeable, and often cavernous. These are undoubtedly the best aquifer in the basin in terms of potential. yield, but are associated with poor quality water (e.g. RN 12584). These horizons are considered to be continuous (Figure 15). The grey-green siltstone and s.illv sandstone (Unit Ta) is not an aquifer, although small supplies could be present in the sandier horizons. Where present, the


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