Product catalogue
Hydrogeology of a raised coral atoll - Niue Island, South Pacific Ocean
Niue Island, in the south Pacific Ocean, is a raised coral atoll with an area of 259 km^2. The original atoll rim is preserved as a peripheral ridge about 60 m above sea level, and the original lagoon floor now forms an internal basin about 35 m above sea level. Drilling has proved limestone of Miocene age to a depth of more than 200 m. Gravity and magnetic surveys indicate that the limestone probably overlies volcanic bedrock at a depth of about 300 m below sea level. The classical Ghyben-Herzberg freshwater lens does not exist on Niue Island. Results of electrical resistivity depth probes indicate that in the centre of Niue the freshwater layer is 40-80 m thick and beneath the former atoll rim it is 50-170 m thick. It decreases to 0 within 500 m of the coast, where salt water mixing occurs along fissures in the limestone. The irregular configuration of the freshwater layer is ascribed to permeability differences in the limestone. Considering the recharge conditions on Niue, the safe yield of a freshwater layer 50 m thick would be about 4000 m^3 of groundwater per year per hectare. Aquifer tests on two specially constructed bores indicate specific capacity (yield-to-drawdown ratio) of about 12 I/s per metre of drawdown, and a safe long-term pumping rate of about 8 I/s.
Simple
Identification info
- Date (Publication)
- 1980-01-01T00:00:00
- Citation identifier
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Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/81050
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Bureau of Mineral Resources, Geology and Geophysics
Canberra Author Jacobson, G.
1 Author Hill, P.J.
2
- Name
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BMR Journal of Australian Geology and Geophysics
- Issue identification
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5:4:271-278
- Point of contact
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Role Organisation / Individual Name Details Custodian Corp
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
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- Geoscientific information
Extent
))
- Maintenance and update frequency
- Unknown
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Keywords
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GA Publication
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Journal
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- Theme
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marine
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- Keywords
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NU
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- Australian and New Zealand Standard Research Classification (ANZSRC)
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Earth Sciences
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Journal article (pdf)
Journal article (pdf)
- Distribution format
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pdf
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Resource lineage
- Statement
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Unknown
- Hierarchy level
- Non geographic dataset
- Other
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GA Publication
- Description
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Source data not available.
Metadata constraints
- Title
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Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/fae9173a-6ff7-71e4-e044-00144fdd4fa6
- Title
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GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
Type of resource
- Resource scope
- Document
- Name
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AGSO BMR Journal
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
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eCatId/81050
- Metadata linkage
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https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/fae9173a-6ff7-71e4-e044-00144fdd4fa6
- Date info (Revision)
- 2018-04-20T06:10:10
- Date info (Creation)
- 2014-06-03T00:00:00
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
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https://pid.geoscience.gov.au/dataset/ga/122551