Australian Ocean Data Network provides a dataset describing the hydrogeology of Niue Island, a raised coral atoll with an area of 259 km^2. The dataset likely contains results from drilling, gravity, magnetic, and electrical resistivity surveys, detailing the freshwater layer thickness and safe yield calculations. The data was last updated on 2026-04-16.
Use Cases
- Model freshwater lens thickness based on electrical resistivity depth probe results
- Calculate safe groundwater yield based on recharge conditions and aquifer thickness
- Analyze aquifer permeability differences based on limestone configuration
- Map saltwater intrusion near the coast based on mixing along fissures
Strengths
- Dataset includes specific measurements: freshwater layer thickness ranges from 40-80 m in the center to 50-170 m beneath the rim
- Provides calculated safe yield estimates: about 4000 m^3 of groundwater per year per hectare for a 50 m thick layer
- Includes aquifer test results: specific capacity of about 12 I/s per metre and safe long-term pumping rate of about 8 I/s
Limitations
- Column-level documentation is absent; field semantics must be inferred after download
- Row count is unknown, which may limit suitability assessment
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Likely contains data gathered from drilling, gravity surveys, magnetic surveys, and electrical resistivity depth probes.
- Freshness
- Last updated 2026-04-16 15:39:36.678520; freshness should be verified
- Geography
- Niue Island, South Pacific Ocean