Groundwater areas proclaimed under the Rights in Water and Irrigation Act, 1914. For the purposes of groundwater resource management, the state of Western Australia is divided into groundwater areas. The extraction and licensing of groundwater resources are managed within groundwater areas. This dataset was formerly known as RIWI Act, Groundwater Areas (DOW-012)

Areas are proclaimed under the following act - Rights in Water And Irrigation Act. Rivers classification mapping is developed to control the extraction and licensing of stream water. Those rivers and tributaries included extend between Perth and Margaret River. Data examined in October 2002 by the Resource Management GIS Branch. Data was found to be of unknown origin, quality, custodian or date. No documentation was found but this data is suspected to have been generated to support the Statutory Referral System. This dataset was formerly known as RIWI Act, Rivers (DOW-018)

Surface Water Management Areas for Western Australia were derived in consultation with the regional offices, geometry is based on hydrographic subcatchments. Regional Department of Environment officers identified areas of similar management requirements to define boundaries. Management areas will be used for licencing and administrative purposes. Purpose: The Surface Water Management Area data was developed in order to give a clear understanding of surface water availability and to provide management tools to make good water allocation and natural resources management decisions. Dataset was formally known as Surface Water Management Areas (DOW-020)

For the purposes of groundwater resource management, the state of Western Australia is divided into groundwater areas proclaimed under the Rights in Water and Irrigation Act 1914. These groundwater areas are further subdivided into groundwater subareas. The subareas are not proclaimed, but are administrative boundaries used to manage the abstraction and licensing of groundwater resources.

This dataset identifies the Management Areas declared under the Waterways Conservation Act 1976. Under the Waterways Conservation Act 1976, the Minister for Water and the Department of Water and Environmental Regulation have responsibility for the conservation of the waters and associated land in five declared Management Areas. The declared Management Areas are Albany waterways, Avon River, Wilson Inlet, Peel Inlet and Leschenault Inlet. The Department of Water and Environmental Regulation has an approval process for certain works affecting waterways and foreshore areas and can provide advice on other developments affecting, or likely to affect, the condition and public amenity of these waterways. Key aspects of the Act relate to protecting and managing the condition and amenity of waterways when there are disturbance activities within or adjacent to the Management Areas. Activities within or adjacent to the Management Area that should be referred to the Department of Water and Environmental Regulation for discussion or licensing include: changes or intensification of land use adjacent to or impacting on waterways or their foreshore areas (e.g. land planning, development, mining, mineral exploration, drainage or flood risk management proposals) dredging, reclamation, dewatering, drainage and construction activities including retaining walls, jetties, private boat ramps or public facilities other activities that may affect declared management areas, for example, those that may increase nutrients. Further information and advice can be sought from Department of Water and Environmental Regulation's regional offices. Contact information for regional offices is available at the Department of Water website.

Surface Water areas stored in WRIMS (Water Resource Information Management System). For the purposes of Surface Water resource management, the state of Western Australia is divided into Surface Water areas. The extraction and licensing of surface water resources are managed within surface water areas in order to ensure environmental requirements are met and to prevent over extraction of the resource. Surface Water Management Areas for Western Australia were derived in consultation with the regional offices, geometry is based on hydrographic subcatchments. Regional Department of Water and Environmental Regulation officers identified areas of similar management requirements to define boundaries. Management areas will be used for licencing and administrative purposes.

Purpose: Management of Groundwater resources in Western Australia. Groundwater Resources stored in WRIMS (Water Resource Information Management System). The intersection of groundwater Subareas with Aquifer boundaries (usually) define groundwater Resources, which are the units used by the DWER to manage environmentally sustainable limits of extraction for groundwater resources. For the purposes of groundwater resource management, the state of Western Australia is divided into groundwater areas proclaimed under the Rights in Water and Irrigation Act. These groundwater areas are further subdivided into groundwater subareas. The subareas are not proclaimed under the Rights in Water and Irrigation Act, but are administrative boundaries used to manage the extraction and licensing of groundwater resources. Groundwater Resources in this dataset are not always the intersection of a Subarea with an Aquifer. Additionally, the Groundwater Areas stored in WRIMS do not accurately reflect the official gazetted Groundwater Area boundaries. A program is currently underway (Sept 2005) to review both Groundwater Resource and Groundwater area boundaries. Please contact the data steward for more information.

Surface Water subareas stored in WRIMS (Water Resource Information Management System). Surface Water Allocation Subareas for Western Australia were derived in consultation with the regional offices, and geometry is based on hydrographic catchments. Regional Department of Water and Environmental Regulation officers identified areas of similar management requirements to define boundaries or aggregations of hydrographic subcatchments. Regions with notable management concerns both currently and possibly in the future were identified to become management subareas. Allocation subareas will be used in the calculation of sustainable yields, flow rates and ultimately these calculations will be available for water allocation and natural resource management decisions. In addition, native vegetation clearing values have been calculated for each of the subareas located within the extent of the South-West region of Western Australia, for input into the allocation process. The Surface Water subarea data was developed in order to give a clear understanding of surface water availability and to provide management tools to make good water allocation and natural resources management decisions.

Surface Water Management subareas for Western Australia were derived in consultation with the regional offices, and geometry is based on hydrographic catchments. Regional Department of Environment officers identified areas of similar management requirements to define boundaries or aggregations of hydrographic subcatchments. Regions with notable management concerns both currently and possibly in the future were identified to become management subareas. Management subareas will be used in the calculation of sustainable yields, flow rates and ultimately these calculations will be available for water allocation and natural resource management decisions. In addition, native vegetation clearing values have been calculated for each of the subareas located within the extent of the South-West region of Western Australia, for input into the allocation process. The Surface Water subarea data was developed in order to give a clear understanding of surface water availability and to provide management tools to make good water allocation and natural resources management decisions. Dataset was formerly known as Surface Water Management Subareas (DOW-021)

This dataset is the Western Australian component of a national Drainage Divisions and Basins dataset overseen by the Australian Water Resources Council. It is part of a hierarchical order of 4 datasets ranging from Subcatchments through Catchments and Basins to Divisions. The Subcatchments, Catchments and Basins are hierarchically ordered subsets of the Divisions dataset. Catchment boundaries have been defined for more than 3400 key sites on streams throughout Western Australia. The Subcatchments dataset contains polygons from which the Catchment boundaries are derived. This catchments dataset is derived from this on the basis of the CATCH_NAME field, determined by the Scientific Custodian. This dataset was formerly known as Hydrographic Catchments - Catchments (DOW-014)