Metadata : Groundwater resources of the Gunn Point Area, 2020
Name: AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile
Date Metadata Extracted: 2021-09-29
Date Metadata Last Updated: 2020-07-17
Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=A7A1399D66866558E0530101007FC356
Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=A7A1399D66866558E0530101007FC356
ANZLIC Identifier: A7A1399D66866558E0530101007FC356
Title: Groundwater resources of the Gunn Point Area, 2020
Citation Date: 2020-06-18
Date Type: publication
Custodian: Department of Environment, Parks and Water Security
A groundwater resource investigation has been undertaken in the Gunn Point region as part of the Mapping the Future project 2018-2022 to inform land use and water resource planning. The project successfully mapped groundwater quality types and the distribution of salinity across the study area.
An analysis was undertaken to produce a map delineating the level of groundwater resource risk associated with development. The study area has been divided into four levels of risk, taking into consideration the factors of electrical conductivity, access to diffuse recharge, impact from salinity and known difficulties in constructing successful bores.
Groundwater Resource Risk Class 1
Access to groundwater risk: Low
Description: Fresh and annual recharge. Fresh water quality (EC < 1000 uS/cm), annual recharge, not impacted by saline groundwater. Shallow depth to productive aquifer.
Groundwater Resource Risk Class 2
Access to groundwater risk: Minor
Description: Fresh but limited annual recharge. Fresh water quality (EC < 1000 uS/cm), minor to no annual recharge, not impacted by saline groundwater. Medium to deep depth to productive aquifer.
Groundwater Resource Risk Class 3
Access to groundwater risk: Moderate
Description: Fresh to brackish and saline impacted. Fresh to brackish groundwater (EC 450 to 2000 uS/cm), impacted by saline groundwater. Mixed depth to aquifer.
Groundwater Resource Risk Class 4
Access to groundwater risk: High
Description: Brackish and saline impacted. Brackish to saline groundwater (EC < 2000 uS/cm), impacted by saline groundwater. Deep depth to productive aquifer.
This record summarised the groundwater resource risk classes as explained above.
The groundwater assessment component of the project achieved three key objectives (captured in the other five datasets for this survey)
1. delineate zones and mechanisms for recharge into the Koolpinyah Dolostone aquifer
2. establish locations and sources of groundwater discharge from the system
3. map the spatial distribution of groundwater salinity and mechanisms for potential intrusion
- North Bounding Coordinate: -12.128
- South Bounding Coordinate: -12.45
- East Bounding Coordinate: 131.293
- West Bounding Coordinate: 130.978
Character Set: Latin 1
Maintenance and Update Frequency: notPlanned
Data Currency Start Date:
Data Currency End Date: 2020-07-17
Access Constraint: Download the spatial data package (contains spatial data, maps and reports) via https://data.nt.gov.au/
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Creative Commons Attribution 4.0 International Public License (CC BY 4.0) at: https://creativecommons.org/licenses/by/4.0/legalcode
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You are free to copy, communicate and adapt the licensed material, provided that you abide by the licence terms (including Attribution) and attribute the licensed material using the statement:
Supplied by the Department of Environment and Natural Resources. Copyright Northern Territory Government.
Positional Accuracy: Positional accuracy of 250 metres from bore locations
Logical Consistency: GIS editing tools were used to rectify all overshoots and undershoots in line work. Following polygon data topological rules, checks were performed to detect flaws in the spatial data structure. The coverage was cleaned, to eliminate any duplicates arcs. The coverage was built for arcs and polygon topologies. A label errors routine was run to detect unlabelled polygons. A node errors routine was run to identify pseudo nodes and dangles. Checks were done to unsure that all classified polygons are closed, nodes are formed at intersections of lines and that each polygon has only one label.
Name Organisation Position Role Phone Fax Data Requests Officer Department of Environment, Parks and Water Security Geospatial Services Branch (on behalf of department) distributor firstname.lastname@example.org
Attribute Attribute Description Possible Code Code Description 01. CODE Survey code 02. NAME Survey name 03. GWRISK Groundwater risk class 04. ACC_GWRISK Access to groundwater risk 05. GW_DESC_1 Groundwater description 1 07. GW_DESC_2 Groundwater description 2
GPGWM_250_BND survey boundary
GPGWM_250_DISCCH productive aquifer recharge areas
GPGWM_250_RCHRG productive aquifer discharge areas
GPGWM_250_DTPA depth below surface to productive aquifer
GPGWM_250_EC groundwater electrical conductivity (uS/cm)
GPGWM_250_WQ groundwater water quality
GPGWM_250_RISK groundwater resource risk classes
This record maintained using the NTLIS Metadata Tool