Hydrogeology of Niue Island with Freshwater Lens Measurements

Niue Island is a raised coral atoll in the south Pacific Ocean with an area of 259 km^2. The dataset likely contains results from drilling, gravity, magnetic, and electrical resistivity surveys describing the island's geology and freshwater aquifer. It was published by the Australian Ocean Data Network.

Use Cases

• Model freshwater lens thickness and distribution based on electrical resistivity depth probe results.
• Analyze aquifer safe yield and recharge conditions based on the described groundwater volume calculations.
• Study the relationship between limestone permeability and freshwater layer configuration as inferred from the description.
• Investigate the subsurface structure of a raised coral atoll using gravity and magnetic survey interpretations.
• Calculate specific capacity and safe pumping rates for wells based on aquifer test results from constructed bores.

Strengths

• Provides specific measurements: freshwater layer thickness ranges from 40-80 m in the center to 50-170 m beneath the rim.
• Includes quantitative aquifer performance metrics: a safe yield of about 4000 m^3 per year per hectare and a specific capacity of about 12 I/s per metre.
• Describes a distinct geological setting: a raised coral atoll with a preserved peripheral ridge and internal basin.

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, focusing solely on Niue Island.

Provenance

Source

Australian Ocean Data Network

Collection Method

Likely gathered through field surveys including drilling, gravity, magnetic, and electrical resistivity probes.

Freshness

Last updated 2026-05-05 02:42:13.000639; freshness should be verified.

Geography

Niue Island, South Pacific Ocean