Hydrogeology of Niue Island Raised Coral Atoll in the South Pacific

Niue Island is a raised coral atoll with an area of 259 km^2. The dataset, published by the Australian Ocean Data Network, contains findings from drilling, gravity, magnetic, and electrical resistivity surveys, describing the island's geology and freshwater lens configuration. It was last updated on 2026-06-27.

Use Cases

• Modeling freshwater lens thickness and safe yield based on described resistivity probe results and recharge conditions.
• Analyzing the relationship between limestone permeability and freshwater layer configuration as described in the study.
• Estimating groundwater resource potential using the provided specific capacity and safe pumping rate data from aquifer tests.
• Studying the subsurface structure of raised atolls based on gravity and magnetic survey interpretations of volcanic bedrock depth.

Strengths

• Provides specific quantitative measurements, including a freshwater layer thickness of 40-170 m and a safe yield estimate of 4000 m^3 per hectare per year.
• Describes a multi-method geophysical investigation, including drilling to over 200 m depth and gravity/magnetic surveys.
• Covers a distinct and well-defined geographical feature: the 259 km^2 raised coral atoll of Niue Island.

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 on a single island case study.

Provenance

Source

Australian Ocean Data Network

Collection Method

Drilling, gravity surveys, magnetic surveys, and electrical resistivity depth probes.

Time Range

null

Freshness

Last updated 2026-06-27 19:00:06.854690; freshness should be verified.

Geography

Niue Island, South Pacific Ocean