Territory Stories

Alpurrurulam Community : bore completion report RN 16925 to RN 16927

Details:

Title

Alpurrurulam Community : bore completion report RN 16925 to RN 16927

Other title

Alpurrurulam Community, bore completion report RN 16925 to 16927.

Creator

Burton, S.; Dames & Moore

Issued by

Northern Territory. Power and Water Corporation

Collection

E-Publications; E-Books; PublicationNT; Report No: 39/1996

Date

1996-06-01

Location

Lake Nash

Language

English

Subject

Drilling and boring -- Northern Territory; Groundwater -- Northern Territory; Water-supply -- Northern Territory; Bores -- Northern Territory

Publisher name

Northern Territory Government

Place of publication

Alice Springs

Series

Report No: 39/1996

Format

1 v. : illustration, map ; 30 cm.

File type

application/pdf

Use

Attribution International 4.0 (CC BY 4.0)

Copyright owner

Northern Territory Government

License

https://creativecommons.org/licenses/by/4.0/

Parent handle

https://hdl.handle.net/10070/229156

Citation address

https://hdl.handle.net/10070/673304

Page content

drawdown {based on retaining the water level above the slotted portion of the casing to reduce corrosion) is 5. 7 m. The calculated maximum pumping rate is 2.0 Us. The recommended pumping rate, taking into account potential interference drawdown and well efficiency {the limiting factor), is 1.5 Us. Installation of the production casing in RN 16927 was obstructed at 61.2 mBGL. The bottom of the casing is open and the top of the aquifer is at approximately 60 mBGL. Higher pumping rates (up to 3.5 Us) could be achieved and anticipated corrosion or encrustation of the slotted portion of casing {which may be accelerated by cyclic emergence and submergence) would not hinder the well performance. Testing at a discharge rate of 3.3 Us entrained small amounts of sediment initially, but the discharge water was sediment-free at the end of testing. Sediment entrainment is not anticipated at moderate pumping rates. The majority of the groundwater yield is expected to enter the bore near the bottom of the hole and cascading is not anticipated. The recommended pumping rates recommended for the existing production bores range between 1.5 Us and 3 Us. Testing at these bores yielded similar leaky confined responses and well efficiencies were not taken into account. Bore Test Reports for RN 16925 and RN 16927 are presented as Appendix C. 6.2.3 Barefield Operation The borefield at Alpurrurulam comprises five production bores, three of which were equipped at the time of writing. Individual recommended pumping rates have been provided for the three previously existing bores (detailed in the Bore Test Reports and presented in Table 3) and they total 8.5 Us. Exhaustive interference testing has not been conducted at the borefield. It is thought that the individual bore yields are not applicable if more than one bore is operated simultaneously. Table 3 details the recommended pumping rates for all production bores at Alpurrurulam, as well as an estimate of suitable pumping rates when several bores are pumped simultaneously. Note that the total of the recommended pumping rates for the five bores is 8.5 Us, which is the same as the total of the recommended pumping rates for the three bores before taking account of interference effects. 15


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