From Western Australia Government
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Christmas Island Water Resources – Zone of high brackish-saline water infiltration

Created 23/06/2025

Updated 23/06/2025

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Water resources data for Christmas Island were assembled as part of ongoing groundwater investigations and monitoring undertaken on Christmas Island during the period from October 1996 to June 1999. The shapefile ‘h_brackish_saline.shp’ contains polygon data indicating the approximate area where collection or monitoring will most likely provide brackish or saline water due to saltwater intrusion. Accuracy: The estimated extent of the boundary is based on information from salinity monitoring boreholes and some estimation based on knowledge of freshwater aquifer behavior near the edges of the island. The boundaries are somewhat subjective and are in fact not fixed, as they will move according to wet and dry periods. Hence it is difficult to generate an accuracy estimate. It could be said that the high brackish or saline boundary would normally be within 30m of the boundary shown, but this could be greater during very dry or very wet periods. Layers were supplied as ESRI shapefiles in CIG85 projection. In September 2003, Geoscience Australia projected these shapefiles into the MGA (GDA94) projection using an XY (X=550015, Y=8780001) shift. Disclaimer

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Field Value
Title Christmas Island Water Resources – Zone of high brackish-saline water infiltration
Language English
Licence Creative Commons Attribution 3.0 Australia
Landing Page https://data.gov.au/data/dataset/9a92d4cb-fcce-4159-9e83-007ac83ea199
Remote Last Updated 26/05/2022
Contact Point
Department of Infrastructure, Transport, Cities and Regional Development
info@data.wa.gov.au
Reference Period 26/06/2018
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        [
          105.26094350963832,
          -10.795374789805713
        ],
        [
          105.26094350963832,
          -10.16880491709837
        ],
        [
          105.98236083984376,
          -10.16880491709837
        ],
        [
          105.98236083984376,
          -10.795374789805713
        ],
        [
          105.26094350963832,
          -10.795374789805713
        ]
      ]
    ]
  ],
  "type": "MultiPolygon"
}
Data Portal Western Australia Government

Data Source

This dataset was originally found on Western Australia Government "Christmas Island Water Resources – Zone of high brackish-saline water infiltration". Please visit the source to access the original metadata of the dataset:
https://catalogue.data.wa.gov.au/dataset/christmas-island-water-resources-zone-of-high-brackish-saline-water-infiltration