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Earth Observation-On Farm Storage (OFS) Water Surface Area Monthly

Created 11/08/2025

Updated 16/08/2025

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This product delivers a monthly timeseries of water surface area for On-Farm Storages (OFS) across the five key valleys of the northern Murray-Darling Basin (Border River, Gwydir, Namoi, Macquarie-Castlereagh, and Barwon-Darling). The dataset encompasses both licensed Flood Plain Harvesting (FPH) storages and other storages of interest within these regions. OFS play a vital role in agricultural water supply by enabling farmers to store water for irrigation. Regular monitoring of these storages is essential for effective water resource management, supporting efforts to address water scarcity, ensure regulatory compliance, respond to climate variability, and promote sustainable agricultural practices. The OFS Water Surface Area Monthly dataset enables the identification of storage fill and drawdown events over large areas, capturing responses to both natural and managed water movements. Timeseries observations are generated from publicly available Landsat (since 1987) and Sentinel (since 2015) satellite imagery, using multispectral data and a streamlined geospatial model [2]. The full methodology is available as open-source code published by the Department [1]. References [1] https://datasets.seed.nsw.gov.au/dataset/remote-sensing-earth-observation-water-toolkit. [2] https://www.tandfonline.com/doi/full/10.1080/01431160600589179 (Subscription required).

Note: If you would like to ask a question, make any suggestions, or tell us how you are using this dataset, please visit the NSW Water Hub which has an online forum you can join.

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Additional Info

Field Value
Title Earth Observation-On Farm Storage (OFS) Water Surface Area Monthly
Language English
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/89425be7-f497-4e91-9cae-7452f07368e3
Remote Last Updated 21/07/2025
Contact Point
NSW Department of Climate Change, Energy, the Environment and Water
?datansw@customerservice.nsw.gov.au
Reference Period 01/07/1987
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        141.7,
        -33.95
      ],
      [
        141.7,
        -28.53
      ],
      [
        152.12,
        -28.53
      ],
      [
        152.12,
        -33.95
      ],
      [
        141.7,
        -33.95
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal DataNSW

Data Source

This dataset was originally found on DataNSW "Earth Observation-On Farm Storage (OFS) Water Surface Area Monthly". Please visit the source to access the original metadata of the dataset:
https://data.nsw.gov.au/data/dataset/nsw-earth-observation-on-farm-storage-ofs-water-surface-area-monthly