Groundwater extractions
The accompanying map shows the volume of groundwater extractions for the 200405
year for each groundwater management unit across Australia based on the data
provided for the Level 1 Assessment by the states and territories. Groundwater is
extracted predominantly through individual bores across Australia , although
there are bore fields for some large users (e.g. for urban water supply in
parts of Western Australia ). In Western Australia , the Northern Territory
and South Australia , groundwater supplies most users, including urban, commercial
and industrial. A large proportion of groundwater extraction in these areas
is for the mining industry, principally for ore concentration and mineral processing
and, in some cases, for the purpose of de-watering to enable the use of dry
mining techniques.
There are no data available for groundwater extractions in Tasmania , as the
groundwater diversions are minimal and are not currently licensed or metered.
Only a small proportion of groundwater extractions are metered across the
country, but metering programmes are currently being planned or implemented
in most states or territories (where groundwater extractions are significant).
It is not expected that meters will ever be installed for all groundwater diversions,
because of the number of individual bores and the difficulty and expense in
doing so. Metering programmes across Australia are currently targeted at areas
within groundwater management units that are highly developed or where aquifer
levels are declining.
In Victoria , 60 groundwater management units have licensed groundwater extractions
that are quantified. Of these, 33 groundwater management units have metered
data, while for a further 27 extractions are estimated (the estimates are based
on an assumed 35 per cent use (including stock and domestic) of the total allocation.
The 35 per cent figure was calculated as the average level of use versus allocation
for the metered areas). Refer to tables below.
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Groundwater extractions July 2004 - June 2005 |
Download high resolution Map:
Groundwater extractions July 2004 - June 2005
(1.9 Meg )
(this document requires the use of Adobe Acrobat
Reader )
Interactive Maps:
Click on the links below to create and customise your own versions of the maps (e.g.
add or remove layers) using the Map Maker tool on the Australian Natural Resource
Atlas website:
Number of groundwater management units where ground water extractions are determined from metered data
|
|
|
ACT |
NSW |
NT |
QLD |
SA |
TAS |
VIC |
WA |
National |
|
1 |
84 |
53 |
14 |
58 |
0 |
60 |
42 |
312 |
|
0 |
49 |
0 |
3 |
3 |
0 |
27 |
42 |
124 |
|
0 |
5 |
0 |
0 |
0 |
0 |
1 |
0 |
6 |
|
0 |
2 |
0 |
0 |
0 |
0 |
1 |
0 |
3 |
|
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
1 |
|
0 |
3 |
0 |
1 |
0 |
0 |
1 |
0 |
5 |
|
1 |
25 |
0 |
1 |
4 |
0 |
29 |
0 |
60 |
|
0 |
0 |
53 |
9 |
51 |
0 |
0 |
0 |
113 |
Method used for determining groundwater extraction for 200405 ( if NOT 100 percent
metered)
|
ACT |
NSW |
NT |
QLD |
SA |
TAS |
VIC |
WA |
National |
|
Estimated from irrigated areas |
0 |
0 |
0 |
0 |
9 |
0 |
0 |
42 |
51 |
|
Estimated from licence volume |
0 |
47 |
0 |
1 |
10 |
0 |
25 |
42 |
125 |
|
Estimated from power usage for pumps |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
|
Estimated from models |
0 |
11 |
0 |
2 |
0 |
0 |
0 |
0 |
13 |
|
Other |
0 |
21 |
0 |
2 |
0 |
0 |
8 |
0 |
31 |
Note: the sum of the methods used may be more than the number of groundwater
management units that are not metered, because more than one calculation method
was used for individual groundwater management units in some cases
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