❓ This WA parliamentary question seeks information on the water usage and water levels associated with a specific bore (G17) and surrounding monitoring bores, likely to assess the impact of water extraction on the aquifer.
AnsweredQoN 2499Legislative Assembly
QuestionView source ↗
(a) how many gigalitres of water does the bore draw from the site;
(b) what was the level of the underground water before the bore was drilled; and
(c) what is the current level of the underground water at this particular site?
(b) what was the level of the underground water before the bore was drilled; and
(c) what is the current level of the underground water at this particular site?
AnswerView source ↗
Answered
4 September 2007
Responded by
Minister for Water Resources
Response time
21 days
(a) 6.2 GL was drawn in 2006/2007.
(b) The potentiometric head in the Yarragadee Aquifer was 2 metres Australian Height Datum (AHD).
(c) When the bore is operating the potentiometric head in the Yarragadee aquifer, in the vicinity of the bore, is significantly lower than when the bore is off. The latest results from bore G17 are:
Bore on: -101 metres AHD (20 August 2007)
Bore off: -34 metres AHD (21 August 2007)
The closest monitoring bores measuring the unconfined aquifer near bore G17 are monitoring bores 793 and 7597. These bores are about 1.5 kilometres south-west and north-west respectively of G17.
These are the water levels recorded at both monitoring sites before commissioning of G17 in March 2003 and the latest level recorded in May 2007.
Monitoring Bore
Water Level October 2002
Water Level May 2007
793
0.93 metres AHD
0.78 metres AHD
7597
1.26 metres AHD
0.93 metres AHD
There are a number of other licensed water users within 3 kilometres of G17 that also draw water from the superficial aquifer in this vicinity.
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(b) The potentiometric head in the Yarragadee Aquifer was 2 metres Australian Height Datum (AHD).
(c) When the bore is operating the potentiometric head in the Yarragadee aquifer, in the vicinity of the bore, is significantly lower than when the bore is off. The latest results from bore G17 are:
Bore on: -101 metres AHD (20 August 2007)
Bore off: -34 metres AHD (21 August 2007)
The closest monitoring bores measuring the unconfined aquifer near bore G17 are monitoring bores 793 and 7597. These bores are about 1.5 kilometres south-west and north-west respectively of G17.
These are the water levels recorded at both monitoring sites before commissioning of G17 in March 2003 and the latest level recorded in May 2007.
Monitoring Bore
Water Level October 2002
Water Level May 2007
793
0.93 metres AHD
0.78 metres AHD
7597
1.26 metres AHD
0.93 metres AHD
There are a number of other licensed water users within 3 kilometres of G17 that also draw water from the superficial aquifer in this vicinity.
Notice: This document is created or edited using unregistered or evaluation copy of rtLib valid for testing or development purposes only. To use it for productive or any other purposes please register it. You may purchase the license on
http://www.rtlib.com
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