This layer is part of Vicmap Elevation 10-20 Contours & Relief, a subset of Vicmap Elevation. It contains point features delineating morphology and related features. Includes; Sinkholes & Caves.

Entura accumulated Level 3 data over 10 year period and interpolated to 5 km grid. Values of 'Deep Blue Aerosol Optical Depth' (AOT) from the MODIS Aqua data set are used in the analysis. These values are non-dimensional, with a valid range of -0.5 to +5.0 (negative readings are not physically valid but are retained for consistency of the algorithm). Typical values are between 0 and 1, with 0.0 representing clear sky; 0.0 to 0.5 representing moderate levels of aerosols; and 0.5 to 1.0 representing relatively high aerosol concentrations (typical of heavy industrialisation).Values over 1.0 are less common and represent considerable levels of aerosols). The methodology is contained within the report prepared by Entura which is downloadable here: <a href=&#09;http://er-info.dpi.vic.gov.au/publications/documentation/geovic_3/energy_division/E300128-TR01%20Solar%20Atlas%20Victoria%20(public%20release)%20with%20calibration%20certificates.pdf&#09;>Solar Atlas Report</a> <a href=&#09;http://er-info.dpi.vic.gov.au/publications/gis/energy_division/solar_aerosol.zip&#09;>Solar Atlas - Solar Aerosol Data - esri shapefile download</a> Departmental contact: Dr. Adrian Panow Director, Energy Investment Department of Primary Industries - Victoria Ph: 9658 4140 Email: Adrian.Panow@dpi.vic.gov.au

In 2011-2012 a species tolerance model was developed by Arthur Rylah Institute, collaborating with DPI, to provide a relative measure of sensitivity of groundwater dependent species to changes in groundwater availability and quality. This grid is the mean output of the model for each Grid cell. Grid cell values have been used to attribute the Potential Groundwater Dependent Ecosystems mapping. Potential Groundwater Dependent Ecosystems (GDE) are ecosystems identified within the landscape as likely to be at least partly dependent on groundwater. Refer to the Potential Groundwater Dependent Ecosystems metadata record for a full acount of the data product.

Potential Groundwater Dependent Ecosystems (GDE) are ecosystems identified within the landscape as likely to be at least partly dependent on groundwater. State-wide screening analysis was performed to identify locations of potential terrestrial GDEs, including wetland areas. The GDE mapping was developed utilising satellite remote sensing data, geological data and groundwater monitoring data in a GIS overlay model. Validation of the model through field assessment has not been performed. The method has been applied for all of Victoria and is the first step in identifying potential groundwater dependent ecosystems that may be threatened by activities such as drainage and groundwater pumping. The dataset specifically covers the Port Phillip and Westernport Catchment Management Authority (CMA) area. The method used in this research is based upon the characteristics of a potential GDE containing area as one that: 1. Has access to groundwater. By definition a GDE must have access to groundwater. For GDE occurrences associated with wetlands and river systems the water table will be at surface with a zone of capillary extension. In the case of terrestrial GDE's (outside of wetlands and river systems), these are dependent on the interaction between depth to water table and the rooting depth of the vegetation community. 2. Has summer (dry period) use of water. Due to the physics of root water uptake, GDEs will use groundwater when other sources are no longer available; this is generally in summer for the Victorian climate. The ability to use groundwater during dry periods creates a contrasting growth pattern with surrounding landscapes where growth has ceased. 3. Has consistent growth patterns, vegetation that uses water all year round will have perennial growth patterns. 4. Has growth patterns similar to verified GDEs. The current mapping does not indicate the degree of groundwater dependence, only locations in the landscape of potential groundwater dependent ecosystems. This dataset does not directly support interpretation of the amount of dependence or the amount of groundwater used by the regions highlighted within the maps. Further analysis and more detailed field based data collection are required to support this. The core data used in the modelling is largely circa 1995 to 2005. It is expected that the methodology used will over estimate the extent of terrestrial GDEs. There will be locations that appear from EvapoTranspiration (ET) data to fulfil the definition of a GDE (as defined by the mapping model) that may not be using groundwater. Two prominent examples are: 1. Riparian zones along sections of rivers and creeks that have deep water tables where the stream feeds the groundwater system and the riparian vegetation is able to access this water flow, as well as any bank storage contained in the valley alluvials. 2. Forested regions that are accessing large unsaturated regolith water stores. The terrestrial GDE layer polygons are classified based on the expected depth to groundwater (ie shallow <5 m or deep >5 m). Additional landscape attributes are also assigned to each mappnig polygon. In 2011-2012 a species tolerance model was developed by Arthur Rylah Institute, collaborating with DPI, to model landscapes with ability to support GDEs and to provide a relative measure of sensitivity of those ecosystems to changes in groundwater availability and quality. Rev 1 of the GDE mapping incorporates species tolerance model attributes for each potential GDE polygon and attributes for interpreted depth to groundwater. Separate datasets and associated metadata records have been created for GDE species tolerance.

The data displays Coal polygon data in a very limited area close to Echuca The data have been collected by the Geological Survey of Victoria. The dataset is accompanied by other datasets representing geology outcrop and boundaries, structural lines, miscellaneous lines and points, metamorphism, and placer deposits. Sourced from the Bendigo 1:250,000 Map 2001 COALINVSBD has a better state wide perspective (from the Victorian Coal - A 2006 Inventory of Resources)

This dataset series contains line, point & polygon features delineating hydrology. It is a combination of a number of data sets that are a part of Vicmap Hydro. Datasets in the series are listed below. See their metadata entries for more detailed metadata. Features include (but are not limited to); rivers, lakes, dams, reservoirs, marinas, and desalination plants. Watercourse Network 1:25,000 - Vicmap Hydro (HY_WATERCOURSE); Water Point 1:25,000 - Vicmap Hydro (HY_WATER_POINT); Water Area (polygon) 1:25,000 - Vicmap Hydro (HY_WATER_AREA_POLYGON): Water Area Fuzzy (polygon) - Vicmap Hydro (HY_WATER_AREA_FUZZY): Water Structure Point 1:25,000 - Vicmap Hydro (HY_WATER_STRUCT_POINT); Water Structure Line 1:25,000 - Vicmap Hydro (HY_WATER_STRUCT_LINE); Water Structure Area (polygon) 1:25,000 - Vicmap Hydro (HY_WATER_STRUCT_AREA_POLYGON); Navigation Line 1:25,000 - Vicmap Hydro (HY_NAVIGATION_LINE); Navigation Point 1:25,000 - Vicmap Hydro (HY_NAVIGATION_POINT);

Polygon layer contains DELWP Land and Fire District Boundaries used for Forest and Fire Management operations.

1:100,000 Landuse rasterised to 20m based on VICMAP_ELEVATION_DTM_20M. For more details see the Metadata for LANDUSE100.

This dataset contains structural zones of Victoria. These zones were defined by VandenBerg et al. (2000) after an original definition by Gray (1988). Altered by Cayley et al. 2018. Each zone encompases rocks that are related in space and time or have a similar structural history. The boundaries to structural zones are usually defined by major faults. The zone names are used extensively in Australian and international geological literature. This layer may be overlayed with other geological data to determine regional geological relationships. References: GRAY, D.R., 1988. Structure and tectonics. In Douglas, J.G. & Ferguson, J.A. (eds), Geology of Victoria, pp. 1–36. Geological Society of Australia, Victorian Division, Melbourne. VandenBerg, A.H.M., Willman, C.E., Maher, S., Simons, B.A., Cayley, R.A., Taylor, D.H. Morand, V.J., Moore, D. & Radojkovic, A., 2000. The Tasman Fold Belt System in Victoria. Geological Survey of Victoria Special Publication. Cayley, R.A., McLean M.A., Skladzien, P.B., & Cairns, C.P., 2018. Stavely Project - Regional 3D Geological Model. Stavely Project Report 3. Geological Survey of Victoria. Department of Economic Development, Jobs, Transport and Resources.

Executive summary: As part of the Victorian Gas Program (VGP), the Geological Survey of Victoria (GSV) is studying the Otway Basin's petroleum systems components (reservoir, seal and source), to assess its petroleum prospectivity and to estimate the potential for further conventional gas discoveries onshore and offshore within Victoria's jurisdiction. Reference to geological structural elements (e.g. the Penola Trough or Port Campbell Embayment) enable geologists to convey ideas about geological features in specific locations. Throughout the VGP, geological structural elements such as troughs or depocentres, platforms, basement and topographic highs have been referenced. As the studies progressed, it was evident that a standard set of names and boundaries for structural elements in the Victorian Otway Basin needed to be defined. New data and interpretations arising from VGP studies, such as the airborne gravity data (Carter et al., 2019) and the 3D geological framework model (Romine et al., 2020), were used in this study to accurately define the boundaries of structural elements. Existing interpretations and literature were also consulted and combined with the boundary definitions to develop a set of georeferenced polygons or shapefiles, defining the major structural elements of the Victorian Otway Basin: Early Cretaceous depocentres, Late Cretaceous depocentres and platforms, and basement and topographic highs. From previous publications, consistent naming had been established for most structural elements; however, some elements had multiple names. Most previously identified structural elements were ill-defined with only small-scale illustrations available. The names used to define the structural elements in this study were resolved by considering the evolution of the understanding of the Otway Basin, along with historical precedence and common usage in the literature. This review of Victorian Otway Basin structural elements provides a detailed set of output files (Attachment A1). These can be used as a consistent reference for future mapping and modelling studies. The structural elements defined in this study are not considered a definitive list. Further refinements should be possible if new data is acquired over areas where data availability limited the interpretation in this study. Bibliographic reference: Vujovic, A., Goldie Divko, L.M. & Eid, R., 2021. A review of structural elements, Otway Basin, Victoria. VGP Technical Report 64. Geological Survey of Victoria, Department of Jobs, Precincts and Regions, Melbourne, Victoria.