This layer is used in association with the GMA layer and represents the internal zone boundaries within each GMA (if applicable).

Boundaries defining the approximate jurisdiction of the Urban Water Corporations.

This layer provides the boundaries of the River Basins of Victoria, and is part of a system devised by the Australian Water Resources Council (AWRC). The basins within Victoria are contained within two drainage divisions; the Murray Darling Division and the South East Coast Division.

This layer is part of a set that defines the beneficial use of Victoria's groundwater resources. According to the Victorian Environmental Protection Authority (EPA), a beneficial use is a use to the environment, or a segment of the environment which is conductive to public benefit, welfare, safety, health or aesthetic enjoyment and which requires protection from the effects of waste discharges, emissions or deposits. A beneficial use may be an existing or potential use. A resource may have more than one beneficial use. The State's groundwater resources have a number of beneficial uses. These uses primarily depend on groundwater quality and aquifer yield and can be assigned to broad water quality classes.

This dataset consists of 'modified' and 'unmodified' waterways for Victoria which have been attributed as 'perennial' or 'non-perennial' (i.e. ephemeral).

Hydrographs from over 2000 state observation bores were reviewed in order to group bores which have a similar water level trend and are screened in the same aquifer. The groupings of observation bores are referred to as 'suites' and are classified according to the Upper, Middle, Lower and Basement aquifers aligning with the Victorian Aquifer Framework. By applying a statistical technical, a normalised hydrograph was developed for each suite using the observed water levels from all bores within the suite. This hydrograph is representative of the groundwater trend within the suite. A spatial boundary has been created for each suite which encompasses all bores within the suite. The boundaries were manually constructed and cover the extent of the mapped aquifers.

This dataset is a subset of the Victorian Groundwater Data Inventory, developed by DELWP. The Data Inventory collated available data relating to four themes: groundwater recharge, aquifer/aquitard properties, groundwater use and aquifer/aquitard thickness. Information has been sourced from 65 hydrogeological studies and contains a spatially enabled representation of data coverage. This dataset represent the Aquifer Properties component of the Data Inventory.

Polygons showing the extent of wetlands in Victoria prior to European settlement. Wetlands are classified into primary categories based on water regimes. The polygon boundaries were derived from digitizing marked up aerial photography interpretation.

Hydrographs from over 2000 state observation bores were reviewed in order to group bores which have a similar water level trend and are screened in the same aquifer. The groupings of observation bores are referred to as 'suites' and are classified according to the Upper, Middle, Lower and Basement aquifers aligning with the Victorian Aquifer Framework. By applying a statistical technical, a normalised hydrograph was developed for each suite using the observed water levels from all bores within the suite. This hydrograph is representative of the groundwater trend within the suite. A spatial boundary has been created for each suite which encompasses all bores within the suite. The boundaries were manually constructed and cover the extent of the mapped aquifers.

The State Observation Bore Network (SOBN) is a n extensive network of groundwater monitoring bores across Victoria managed by the Department of Environment, Land, Water and Planning. The information gathered from these bores provides water resource managers with key data and knowledge to manage groundwater resources in Victoria. This dataset is derived from the Victorian Water Measurement Information System database.