Niue Island is a raised coral atoll with an area of 259 km^2 and a freshwater layer that varies from 40-170 m thick. The dataset likely contains results from drilling, gravity, magnetic, and electrical resistivity surveys conducted by Geoscience Australia. It describes the island's unique aquifer structure, where the classical Ghyben-Herzberg freshwater lens does not exist.
Use Cases
- Modeling freshwater lens geometry based on electrical resistivity depth probe results
- Estimating safe groundwater yield based on recharge conditions and aquifer thickness
- Analyzing the relationship between limestone permeability and freshwater layer configuration
- Studying saltwater intrusion dynamics near the coast where mixing occurs along fissures
Strengths
- Includes specific quantitative findings, such as a freshwater layer thickness of 40-80 m in the island's center
- Provides concrete aquifer performance metrics, including a specific capacity of about 12 l/s per metre of drawdown
- Describes the geological structure in detail, including limestone depth of more than 200 m and volcanic bedrock at about 300 m
Limitations
- Column-level documentation is absent; field semantics must be inferred after download
- Row count is unknown, which may limit suitability assessment
- Data is presented in PDF/HTML formats, which may require extraction for computational analysis
Provenance
- Source
- Geoscience Australia Data
- Collection Method
- Likely contains results from drilling, gravity surveys, magnetic surveys, and electrical resistivity depth probes.
- Freshness
- Last updated 2026-04-30 13:16:08.268618; freshness should be verified
- Geography
- Niue Island, South Pacific Ocean