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Regional Water Resource Assessment – GMU |
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Lower Gwydir Alluvium |
Lower Gwydir Alluvium Groundwater Management Unit is within New South Wales and is 2,516 km2
The categories used for the breakdown of water consumption are as per Table 2.9
of the Water Account 2004-05. "Other" in respect of the estimated water consumption
comprises water use within the following industries:
- Water supply, sewerage and drainage services
- Electricity and gas
- Forestry and fishing
- Services to Agriculture
- "Other industries"
Results of the National Water Commission’s Framework for Assessment of River and
Wetland Health for
Lower Gwydir Alluvium
GMU
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This page provides high level performance indicators of water management for the
Lower Gwydir Alluvium
groundwater management unit (GMU) based on information provided by the government
of
NSW.
It provides answers to a range of questions of relevance to the National Water Initiative
(NWI), specifically in relation to:
- Groundwater management framework
- Water resource caps
- Surface water / groundwater interaction
- Sustainable groundwater yield
- Environmental allowances / provisions
- Groundwater diversions
- Groundwater entitlements
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Please note that a dash means that either the data was not
available, not provided or that the question was not relevant for a particular area.
Groundwater management framework
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What is the status of the water management plan for this groundwater management
unit? |
Draft |
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If a final or draft plan has been written, what year was it completed?
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2002 |
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If a final or draft plan has been written, does it explicitly consider surface water? |
No |
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If yes, how? |
- |
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Does your water plan specify water quality objectives to meet environmental and
other public benefit outcomes? |
Yes |
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Other items included in the management framework are: |
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Metering program for this area
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Included |
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Effluent recycling
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- |
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Climate change
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Included |
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Aquifer storage and recovery
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Not included |
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Efficient irrigation systems
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Not included |
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Other
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Included |
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Management plan available at: |
Management plan |
Water resource caps
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Has a cap been placed on groundwater usage / abstraction in this groundwater management
unit? |
Yes |
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Is the cap an absolute limit to allocation or provisional limit? |
Absolute |
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If there is a cap, what year was it implemented? |
2002 |
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If there is a cap, is it considered to represent the sustainable groundwater yield? |
Yes |
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The following water usage types are included/not included under the cap: |
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Irrigation
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Included |
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Urban supply
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Included |
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Commercial / Industrial
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Included |
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Stock and domestic
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Not included |
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Mining / Oil and gas
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Included |
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Forestry
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Not included |
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Drought supply
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Not included |
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Greywater use
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Not included |
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Effluent recycling
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Not included |
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Aquifer storage and recovery
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- |
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Other
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- |
Surface water / groundwater interaction
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Are groundwater and surface water managed as an integrated water resource in this
groundwater management unit? |
No |
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Reason or method: |
Not integrated - high connection |
Sustainable groundwater yield
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The sustainable yield within this groundwater management unit for 2004/05 was: |
32300 ML |
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The method used to determine the sustainable yield was: |
Detailed numerical modelling |
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Was the sustainable yield determined for the combined (i.e. surface water and groundwater)
water resources? |
No |
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Is the cap considered to be at or below the sustainable yield of surface water? |
At |
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If the cap is above the sustainable yield, are there management actions to bring
the cap down to sustainable yield? |
- |
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How has the aquifer responded? |
Stable |
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Does this aquifer trend require a management response? |
No |
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What is the level of development relative to the sustainable yield? |
High level of development |
Environmental allowances / provisions
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Have groundwater dependent ecosystems been identified for this groundwater management
unit? |
No |
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If yes, in what year were they identified?
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- |
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If yes, what type (s) of groundwater dependent ecosystems have been identified? |
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Terrestrial vegetation
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- |
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River base flow systems
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- |
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Aquifer and cave ecosystems
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- |
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Wetlands
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- |
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Terrestrial fauna
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- |
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Estuarine and near shore marine ecosystems
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- |
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Other
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- |
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Have environmental water requirements for the identified groundwater dependent ecosystems
been determined? |
No |
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Have environmental water provisions for the identified groundwater dependent ecosystems
been formally adopted / approved? |
Yes |
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Do the environmental water provisions take into account surface water?
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No |
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If yes, how? |
- |
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Completed environmental water requirement/provision reports available at:
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Groundwater diversions
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The total groundwater extraction in the groundwater management unit for 2004/05
was: |
36200 ML |
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What percentage of groundwater extraction is determined from metered data? |
100% |
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What is the level of diversions relative to the sustainable yield? |
112% |
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For surface water diversion that is NOT metered, how was the surface water diversion
determined for 2004/05? |
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Estimated from irrigated areas
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- |
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Estimated from licence volume
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- |
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Estimated from power usage for pumps
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- |
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Estimated from models
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- |
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Other
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- |
Groundwater entitlements
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Entitlements for groundwater are required/not required for the following usage types: |
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Irrigation
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Required |
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Urban supply
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Required |
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Commercial / Industrial
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Required |
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Farm dams
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- |
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Stock and domestic
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Not required |
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Mining / Oil and gas
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Required |
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Forestry
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Not required |
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Floodplain harvesting
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- |
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Drought supply
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Required |
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Greywater use
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- |
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Effluent recycling
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- |
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Aquifer storage and recovery
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Required |
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Other
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- |
Related links
The links below provide access to similar reports for surface water management areas
(SWMAs) that overlap this groundwater management unit (GMU).
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