Hydrogeology of Niue Island Raised Coral Atoll

A geospatial dataset describes the hydrogeology of Niue Island, a raised coral atoll in the South Pacific Ocean with an area of 259 km². The data likely contains results from drilling, gravity and magnetic surveys, and electrical resistivity depth probes, indicating freshwater layer thickness and aquifer properties. It was published by Geoscience Australia Data and last updated in May 2026.

Use Cases

• Model freshwater lens geometry based on described thickness variations from 0 to 170 meters.
• Estimate groundwater safe yield based on the described recharge conditions and aquifer test results.
• Analyze subsurface permeability differences based on the described irregular freshwater layer configuration.
• Study saltwater intrusion dynamics based on the described mixing within 500 meters of the coast.

Strengths

• Includes specific quantitative measurements, such as a freshwater layer thickness of 40-80 meters in the island's center.
• Describes aquifer properties with concrete figures, including a specific capacity of about 12 L/s per meter of drawdown.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to data_gov_au.

Provenance

Source

Geoscience Australia Data

Collection Method

Likely compiled from field surveys, including drilling, gravity and magnetic surveys, and electrical resistivity depth probes.

Freshness

Last updated 2026-05-14 04:56:53.033770; freshness should be verified.

Geography

Niue Island, South Pacific Ocean