Spatial data representing Victorian coastal lands which have the potential to contain coastal acid sulfate soil (CASS), i.e. it is prospective for CASS. This spatial data is used for triggering an investigation of a site where proposed activities risk disturbing CASS. Disturbing CASS is defined as causing oxygen to penetrate earth material that contains metal oxides either in sulfidic material or sulfuric material. Sulfidic material is soil or sediment that contains metal sulfides which oxidise to sulfuric acid in the presence of oxygen. Sulfuric material has either partially or completely oxidised metal oxides. This data was created to help avoid disturbing potential CASS.
An explanation of Coastal Acid Sulphate Soils and their mapping is available on Victorian Resources Online: http://vro.depi.vic.gov.au/dpi/vro/vrosite.nsf/pages/soil_acid_sulfate_soils
DOI 10.4226/92/58e723a645d1f
Creative Commons Attribution 4.0 (CC-BY)
(
License Text
)
Unrestricted.
Data Existence:
Metadata Name
Descriptions
Resource Name:
COASTAL_ACID_SULPHATE_SOILS
Title:
Coastal Acid Sulphate Soils
Anzlic ID:
ANZVI0803002827
Custodian:
Owner:
Jurisdiction:
Victoria
Abstract:
Spatial data representing Victorian coastal lands which have the potential to contain coastal acid sulfate soil (CASS), i.e. it is prospective for CASS. This spatial data is used for triggering an investigation of a site where proposed activities risk disturbing CASS. Disturbing CASS is defined as causing oxygen to penetrate earth material that contains metal oxides either in sulfidic material or sulfuric material. Sulfidic material is soil or sediment that contains metal sulfides which oxidise to sulfuric acid in the presence of oxygen. Sulfuric material has either partially or completely oxidised metal oxides. This data was created to help avoid disturbing potential CASS.
An explanation of Coastal Acid Sulphate Soils and their mapping is available on Victorian Resources Online: http://vro.depi.vic.gov.au/dpi/vro/vrosite.nsf/pages/soil_acid_sulfate_soils
DOI 10.4226/92/58e723a645d1f
Search Words:
Geoscientific information
Purpose:
Geographic Extent Polygon:
Geographic Bounding Box:
Beginning to Ending Date:
2001-06-30 - 2011-03-30
Maintainence and Update Frequency:
Not planned
Stored Data Format:
Available Format(s) Types:
ESRI shapefile
Positional Accuracy:
±30m
Handheld GPS
Attribute Accuracy:
Derived from sparse field samples
Logical Consistency:
Not Known
Data Source:
Dataset Source: Mapping was by interpretation of aerial photography, and data on site features, topography, water quality, soil and geology. Shapefiles were in decimal degrees with a datum of GDA94. LiDAR derived DEM data (MGA94) was used to aid mapping. In some areas, mostly in the eastern half of the state, contour lines from the DEM data, served as critical values of elevation (typically 2, 2.5, 3, 3.5 m AHD) below which prospectivity was interpreted to exist: a model typically applied to coastal plains, dunefields, flood plains and swamps. On-ground survey and soil analytical data was confined to land west of Lake Tyers. All inland boundaries were smoothed (PAEK 50-100 m) for Prospective Land. Made Land and Water were not smoothed and abut Prospective Land without gaps. The Water polygons were from the HY_WATER_AREA_POLYGON_NAMED spatial layer for all but Mallacoota Inlet and Reedy Lake, where the ESTUARIES spatial layer was used. While some waterbodies are navigable, many are shallow, many vary in outline and area with seasons, and some are ephemeral. Shorelines were used to clip the seaward extent. The shoreline boundaries were from the VIC_AUSCSTGEO_SHORELINE_SEG spatial layer for most of the coast. SHORELINE25 spatial layer was used in some parts, e.g. Bass River.
Dataset Originality: Primary & Derived
Contact Organisation:
Contact Position:
Address:
Telephone:
Facsimile:
Email Address:
Metadata Date:
2019-05-30
Additional Metadata:
Current Design Issues: Regional overview to alert land managers of the probable presence of ASS for the purposes of avoiding disturbance.
Related Documents: None
http://vro.depi.vic.gov.au/dpi/vro/vrosite.nsf/pages/soil_acid_sulfate_soils