Territory Stories

Renison Goldfields Consolidated Limited, Pine Creek Project. Groundwater Investigation Stage 2, Establishment of Borefield and Management Studies. Report H114/3-AA.

Details:

Title

Renison Goldfields Consolidated Limited, Pine Creek Project. Groundwater Investigation Stage 2, Establishment of Borefield and Management Studies. Report H114/3-AA.

Creator

Coffey & Partners Pty Ltd

Collection

E-Publications; E-Books; PublicationNT; Report no. 87/1984

Date

1983-11-01

Notes

Date:1983-11

Language

English

Publisher name

Northern Territory Government

Place of publication

Darwin

Series

Report no. 87/1984

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/10070/228435

Citation address

https://hdl.handle.net/10070/674167

Page content

Technical Report WRD84087 Viewed at 14:07:14 on 29/07/2010 Page 51 of 167. , J ~ I , I I I I I I I I I I I ~ , , I , I Hl14/l-MRS Nov 26, 1983 5.5. 1 ,:t:!'.&!iiI .. _ . ImE Creek acts as a discharge mechanism for the groundwater system. This may be simply via evapotranspiration from vegetation along the dy.,inage~ A limited amount of pumping also occurs in conjunction with irrigation uC c~sh crops at Kybrook Farm. ,\RA 3 Groundwater movement in ARE."". 3 is to the south west towards Caledonian Creek. The most dominant feature of the contours is the steep gradient developed inunediately to the west of Bore li1l9. There appears to be an 18 metre fall in the elevation of the water table (fro~ RL 182 to 164 m) ove~ a dist-?!nce of 400 to 500 metres (gradient 0.039). ~'ihile the factors controlling this are not evident, the tightening of contour's suggests a zone of low permeabilit.y. This may be dSSOcleted with a distinct change in lithology east of the lAO m contour. It is :1oted that the orienta.~~ of the contours is consistent witr. the regional ge~~~l strike direction. .~ Ground .... " ter Flrn" /~~ d t'iii::.. t r:stlm.-!.tcs or the rate of groun water mo,...~t tnroug.1. t ~e aquifer C.Qll 'e made bascc. on aquifer pt....~ility anri hydraul ic gradient de:-ived from the w~ablC con.tou.rs. At thi.s point no attempt has Dee:1 m~ qUd:1tify ':.hroughfl.O," clue to t~e marked variatior. ~aL!liC gradients and the llkf::>ilhoOQ of aqUifer anlstr These aspects are dLS("llSSC"d lurther i:r.. Sect.ion 6. q: ~ia ter Qua 1 i Ly Water samples from 15 holes were submi tted to the DTrv'l vlater Quality Luboratories foy general water quality analysis . In addition 9 samples were collected for heavy metal determination using procedures specified by the DT~'T. R('''-~ul t.s of the analysis are summarized in Table 124 Inspection of Table 12 indicates that the groundwater is of i1: bicarbonate type~ with mode:::-ate hardness and p::i values of greater than 7 (range 6.8-8.S). Total dissolved solids (salinity) is generally less than 500 mg!l TDS (average 244 mg/l TDS) and sodium chloride concentration is generally less than 90 mq/l. These resul ts are cO:1si:- I ent with a "':'ompila tion of '."rater quali ty data prepared using data oblained from the DT" .. J Water Division records, see Table 13 ru~C Appendix 6. 28.