New South Wales – Dryland Salinity Assessment 2000 – Assessmet of Dryland salinity extent 2020

\r\n\r\nThe data shows areas of dryland salinity risk in 2020 in the Murray-Darling\r\nBasin within NSW and coastal NSW catchments.Areas of risk are based on\r\ngroundwater levels and air photo interpretation. The merged data, at a nominal\r\nscale of 1:250 000, show actual areas where dryland salinity or water-tables\r\nless than 2 metres have been measured. For the extent map, every delineated\r\narea is underpinned by either air photo data or by one or more groundwater\r\nbores. Therefore, the area at risk is regarded as conservative due to\r\nlimitations in the spatial coverage of air photo and bore data. number of\r\ntechniques to spatially extrapolate these data to infer potential areas at\r\nrisk were trialed but were considered scientifically or statistically\r\ninadequate. Estimates of impacts are based on areas at risk having groundwater\r\nlevels of less than 2 m. An impact assessment based on groundwater less than 5\r\nm and rising was considered inappropriate. Total areas affected with\r\ngroundwater less than 5 m and rising have been presented, but only for\r\nimproved consistency with other States.\r\n\r\nSee [further metadata](http://data.daff.gov.au/anrdl/metadata_files/pa_dsa__r1in\r\n__00111a02.xml) for more detail.\r\n\r\n