From Terrestrial Ecosystem Research Network
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Prescott Index derived from 1" SRTM DEM-S

Created 25/06/2025

Updated 25/06/2025

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The Prescott Index is a measure of water balance that has proven to be a useful in soil mapping both to stratify study areas for sampling and as a quantitative predictor of soil properties (Prescott, 1949; McKenzie et al, 2000). The index was designed to give an indication of the intensity of leaching by excess water and is calculated using long-term average precipitation P and potential evaporation E, both expressed as mean monthly values in mm (mean annual values divided by 12): PI = 0.445P / E^0.75 The evaporation was estimated from temperature and net radiation; the net radiation was computed by the SRAD solar radiation model using the smoothed 1 arc-second resolution DEM-S (ANZCW0703014016) and includes both regional climatic influences and local topographic effects. Precipitation and temperature were obtained from national climate surfaces averaged over the same time period as the climatic information used in the radiation calculations (1981-2006). The Prescott Index has no units. Larger values indicate wetter conditions. The 3 arc-second resolution version of the Prescott Index has been produced from the 1 arc-second resolution surface, by aggregating the cells in a 3x3 window and taking the mean value.

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Additional Info

Field Value
Title Prescott Index derived from 1" SRTM DEM-S
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/322e8c3c-594a-4562-a0a1-050382d4f086
Contact Point
Terrestrial Ecosystem Research Network�s Data Discovery
esupport@tern.org.au
Reference Period 11/02/2000 - 22/02/2000
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        113.0,
        -44.0
      ],
      [
        154.0,
        -44.0
      ],
      [
        154.0,
        -10.0
      ],
      [
        113.0,
        -10.0
      ],
      [
        113.0,
        -44.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Terrestrial Ecosystem Research Network

Data Source

This dataset was originally found on Terrestrial Ecosystem Research Network "Prescott Index derived from 1" SRTM DEM-S". Please visit the source to access the original metadata of the dataset:
https://geonetwork.tern.org.au/geonetwork/srv/eng/csw/dataset/prescott-index-derived-from-1quot-srtm-dem-s