Norfolk Island potential acid sulfate soils (ASS)

This dataset depicts polygons of potential acid sulfate soils identified as part of the Norfolk Island Water Resource Assessment (NIWRA). Areas were mapped due to the importance to groundwater recharge, surface water storage and managed aquifer recharge. These soils may either contain acidity or have the potential to form acid in amounts that have impacts on water quality, the environment (wetlands and creeks) and infrastructure. Further acid sulfate soil information can be found in the NIWRA technical report (Petheram et al., 2020) and described in Appendix D of the NIWRA technical report.\nLineage: The acid sulfate soil dataset has been generated from a range of inputs and processing steps. The following is an overview of the methods detailed in Petheram et al. 2020. 1. Collated existing data (relating to: soils, climate, topography, natural resources, remotely sensed, of various formats: reports, spatial vector, spatial raster). 2. Selection of additional soil and land attribute site data locations. 3. Fieldwork was carried out to collect new attribute data, soil samples for analysis and build an understanding of geomorphology and landscape processes. 4. Esri ArcMap was used to delineate polygons. 5. QA Quality assessment of the data was conducted by on-ground expert (qualitative) examination of the mapping.