Prescott Index derived from 1" SRTM DEM-S

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About this Collection

Prescott Index derived from 1" SRTM DEM-S

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-te... more

Environmental Management Land Capability and Soil Degradation Landscape Ecology Natural Resource Management Soil Sciences not elsewhere classified

11 Feb 2000

22 Feb 2000

CSIRO Enquiries
1300 363 400

Prescott Index LAND Topography Models ECOLOGY Landscape TERN_Soils Land Surface Australia


Source data 1. Mean monthly net radiation calculated by SRAD using the 1 second DEM-S 2. Precipitation at 0.05 degree resolution for the period 1981-2006 (Bureau of Meteorology 3. Temperature at 0.05 degree resolution, calculated from monthly minimum and maximum air temperature for the period 1981-2006 (Bureau of Meteorology Prescott Index calculation Mean annual precipitation for the period 1981-2006 was calculated then divided by 12 to give a single monthly average. A single average monthly temperature was calculated from the mean monthly minimum and maximum temperatures for 1981-2006. Both the precipitation and temperature surfaces were then resampled to 1 arc-second resolution. A single mean monthly net radiation was calculated from the 12 net radiation surfaces produced by SRAD. Calculation of Prescott Index requires monthly potential evapotranspiration (mm/month) as an input. The equation used to calculate PET from net radiation is the Priestley-Taylor equation (Priestley and Taylor, 1972) expressed as mm/month: PET = (6.226 + 0.2670T - 0.002130T^2) * RN Finally, Prescott Index was calculated from mean monthly precipitation and PET: Prescott = (0.445 * precipitation) / (PET ^ 0.75) The Prescott Index calculation was performed on 1° x 1° tiles at 1 arc-second resolution and the 3 arc-second resolution version was produced by aggregating the 1” cells in a 3x3 window and taking the mean value.

Access to this data has been made possible by the Terrestrial Ecosystem Research Network (TERN), supported by the Australian Government through the National Collaborative Research Infrastructure Strategy and the Super Science Initiative.

Creative Commons Attribution 3.0 Unported Licence

CSIRO (Australia)

Gallant, John; Austin, Jenet (2012): Prescott Index derived from 1" SRTM DEM-S. v2. CSIRO. Data Collection.

All Rights (including copyright) CSIRO Australia 2012.

The metadata and files (if any) are available to the public.

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Location Details

10°0′0″ S

44°0′0″ S

154°0′0″ E

113°0′0″ E


More about this Collection

John Gallant

Terrain Analysis Research Team Leader

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About this Project

1181.2 TERN Facility No9 InfoGrid GRUNDY

The Soil and Landscape Grid of Australia is a comprehensive fine spatial resolution grid of functional soil attributes and key landscape features across Australia. The landscape attributes are derived from the data collected by the Shuttle Radar Topography Mission, whilst the soil attribute surfaces are modelled from existing soils information. The... more

John Gallant

National Elevation and Terrain Datasets

SRTM-derived elevation and terrain covariate datasets at 1 second or 3 second resolution


John Gallant

Jenet Austin

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