Survey of land degradation in New South Wales,Australia |
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Authors: | Owen P Graham |
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Institution: | (1) Soil Conservation Service of NSW, PO Box 1416, 2124 Parramatta, NSW, Australia |
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Abstract: | A survey of land degradation was undertaken in New South Wales, Australia during 1987–1988. The aims of the survey were to
assess the location, extent, and severity of ten forms of degradation and to present the data in map and statistical form.
Sample points were located on a regular grid. The method was designed so that data could be acquired from aerial photographs,
expert local knowledge, and limited field checking. Individual statewide maps were prepared for each form of degradation.
Map data were shown in pixel form. Sheet and rill erosion and soil structure decline were confined mostly to lands used for
cropping. Gully erosion was commonly found across the state, while mass movement was confined to steeper lands. There were
three severe areas of dryland salinity; irrigation salinity was mapped in parts of the southern irrigation lands. Induced
soil acidity was severe in some cropping and pasture lands. Absence of tree regrowth was a noticeable feature of lands used
for cropping. The survey enabled community awareness of the problems of land degradation to be increased, in addition to assisting
regional land managers in resource allocation. The survey also provided the basis for the future location of sites that could
be used to monitor the trends in the status of land degradation. |
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Keywords: | Erosion Land degradation Survey Methodology Map Soil |
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