The objective of this study was to determine the area, severity and location of secondary saline discharge in the South West Sands and Tertiary Gravels and Sands LMU and present it in map and database form.
Aerial photos were used for the location of saline sites and an extensive ground truthing program was carried out using ISCON techniques for the classification of salt severity.
A total of 360 hectares was found to be salt affected with sites varying in size from 0.1 to 66.7 hectares. The majority of sites were affected by a low level of salinity, although some were moderately or severely saline. Most of the discharge sites appeared in drainage lines, with some in depression, flats, slopes and lake margins.
Considering the vast area that these LMUs cover, the saline sites are few and scattered and most are not of a severe nature. Landholder awareness was minimal and this was likely to be due to the low severity rating and small area affected.
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