The Rights in Water and Irrigation Act 1914 provides the Governor of Western Australia the power to proclaim or prescribe through regulation a Surface Water Area. A Surface Water Area is proclaimed for the purposes of regulating the taking of water from watercourses and wetlands. An area is proclaimed, or prescribed through regulations, where there is a need for systematic management of the use of water. The proclamation is made on the recommendation of the Department and must first be tabled before both Houses of Parliament. Proclaiming or prescribing an area has the effect of allowing the use of water for commercial activity under a licence. Where an area has been proclaimed, the provisions of Division 1B of Part III of the Act apply to surface water in that area. This allows comprehensive management of water uses in that area. This dataset defines the boundaries which are proclaimed as Irrigation Districts (IDs) under the Rights in Water and Irrigation Act, 1914 (RIWI Act). In addition to the boundary definition within the Act these areas are subject to Division 1B of the Act which implements licensing of water use from watercourses and wetlands in the area. Irrigation districts are areas where the Water Corporation or another service provider may construct work and supply water to land owners for irrigation purposes. This dataset is the result of combining three existing datasets; RIWI Areas, RIWI Irrigation Districts and RIWI Surface Water Areas. It replaces all three. This dataset was formerly known as RIWI Act, Surface Water Areas and Irrigation Districts (DOW-019)

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) Show full description

Public drinking water source areas (PDWSAs) are surface water catchments and groundwater areas that provide drinking water to cities, towns and communities throughout the state. PDWSAs are proclaimed under the Metropolitan Water Supply, Sewerage, and Drainage Act 1909 or the Country Areas Water Supply Act 1947. Groundwater sources are normally referred to as underground water pollution control areas or water reserves. Surface water sources are generally referred to as catchment areas. The PDWSA dataset is used by the Department of Water and Environmental Regulation in policy decision-making and for providing advice about protecting drinking water quality when land uses and activities are proposed in PDWSAs. This dataset was formerly known as Public Drinking Water Source Areas (DOW-007)

Surface Water - This dataset displays Victoria's surface-water Water Supply Protection Areas (WSPAs), and has been prepared for the Groundwater and Licensing Branch and the River Health Branch DSE, by LICS (Land Information Cartographic Services) and Melbourne Water.

As part of the 2002 amendments to the Water Act 1989, surface-water was included to allow WSPAs to be declared for the protection of surface-water resources in a defined area. A legally enforceable Streamflow Management Plan is then developed. The aim of the plan is to manage the surface water resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process guarantees that surface water users have a major input into the development of the Streamflow Management Plan for their area. A Ministerial appointed Consultative Committee which represents all relevant interests prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Groundwater - This dataset displays Victoria's groundwater Water Supply Protection Areas (WSPAs), and was originally prepared for Groundwater and Licensing Branch DSE, by LICS (Land Information Cartographic Services). Boundaries generaterd by LICS and Melbourne Water. Subsequent revisions have been undertaken by GLiB and the Rural Water Corporations.

WSPAs are areas that have been (or are proposed to be) proclaimed under the Water Act 1989 for the purpose of establishing a management plan. The aim of the plan is to manage the groundwater resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process guarantees that groundwater users have a major input into the development of the Groundwater Management Plan for their area. A Ministerial appointed Consultative Committee, which represents all relevant interests, prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Surface Water - This dataset displays Victoria's surface-water Water Supply Protection Areas (WSPAs), and has been prepared for the Groundwater and Licensing Branch and the River Health Branch DSE, by LICS (Land Information Cartographic Services) and Melbourne Water.

As part of the 2002 amendments to the Water Act 1989, surface-water was included to allow WSPAs to be declared for the protection of surface-water resources in a defined area. A legally enforceable Streamflow Management Plan is then developed. The aim of the plan is to manage the surface water resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process guarantees that surface water users have a major input into the development of the Streamflow Management Plan for their area. A Ministerial appointed Consultative Committee which represents all relevant interests prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Groundwater - This dataset displays Victoria's groundwater Water Supply Protection Areas (WSPAs), and was originally prepared for Groundwater and Licensing Branch DSE, by LICS (Land Information Cartographic Services). Boundaries generaterd by LICS and Melbourne Water. Subsequent revisions have been undertaken by GLiB and the Rural Water Corporations.

WSPAs are areas that have been (or are proposed to be) proclaimed under the Water Act 1989 for the purpose of establishing a management plan. The aim of the plan is to manage the groundwater resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process guarantees that groundwater users have a major input into the development of the Groundwater Management Plan for their area. A Ministerial appointed Consultative Committee, which represents all relevant interests, prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Abstract

This dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third part and are presented here as originally supplied.

Surface Water - This dataset displays Victoria's surface-water Water Supply Protection Areas (WSPAs), and has been prepared for the Groundwater and Licensing Branch and the River Health Branch DSE, by LICS (Land Information Cartographic Services) and Melbourne Water.

As part of the 2002 amendments to the Water Act 1989, surface-water was included to allow WSPAs to be declared for the protection of surface-water resources in a defined area. A legally enforceable Streamflow Management Plan is then developed. The aim of the plan is to manage the surface water resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process guarantees that surface water users have a major input into the development of the Streamflow Management Plan for their

area. A Ministerial appointed Consultative Committee which represents all relevant interests prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Groundwater - This dataset displays Victoria's groundwater Water Supply Protection Areas (WSPAs), and was originally prepared for Groundwater and Licensing Branch DSE, by LICS (Land Information Cartographic Services). Boundaries generaterd by LICS and Melbourne Water. Subsequent revisions have been undertaken by GLiB and the Rural Water Corporations. WSPAs are areas that have been (or are proposed to be) proclaimed under the Water Act 1989 for the purpose of establishing a management plan. The aim of the plan is to manage the groundwater resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process

guarantees that groundwater users have a major input into the development of the Groundwater Management Plan for their area. A Ministerial appointed Consultative Committee, which represents all relevant interests, prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Dataset History

Boundaries generaterd by LICS and Melbourne Water. Subsequent revisions have been undertaken by the Groundwater and Licensing Branch (GLiB) and the Rural Water Corporations.

Dataset Citation

Victorian Department of Environment and Primary Industries (2014) Victorian Water Supply Protection Areas. Bioregional Assessment Source Dataset. Viewed 05 October 2018, http://data.bioregionalassessments.gov.au/dataset/2138f7eb-468e-4522-b214-f1bd0b440ba8.

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 …Show full descriptionFor 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.

Abstract

This dataset and its metadata statement were derived by the Bioregional Assessment Programme from boundary data supplied by the Victorian DEPI groundwater branch. The parent datasets are identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.

This subset geodatabase contains a collection of Water Supply Protection Area and Groundwater Management Area boundaries in the Gippsland region. This subset has been superseded by GMA and WSPA boundaries in Gippsland - geodatabase v2 (bfb32a2e-bf93-4c6a-a361-1817e85ddba9).

Where groundwater has been intensively developed in Victoria, or has the potential to be developed, Groundwater Management Areas (GMAs) are established and the Permissible Consumptive Volume (PCV) is progressively set. Monitoring of the groundwater resource in these areas is undertaken by the Department of Sustainability and Environment (now DELWP, ed) through the State Groundwater Monitoring Network. Water levels and the amount of water allocated to groundwater users in the areas are closely monitored.

Surface Water - This dataset displays Victoria's surface-water Water Supply Protection Areas (WSPAs), and has been prepared for the Groundwater and Licensing Branch and the River Health Branch DSE, by LICS (Land Information Cartographic Services) and Melbourne Water.

As part of the 2002 amendments to the Water Act 1989, surface-water was included to allow WSPAs to be declared for the protection of surface-water resources in a defined area. A legally enforceable Streamflow Management Plan is then developed. The aim of the plan is to manage the surface water resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process guarantees that surface water users have a major input into the development of the Streamflow Management Plan for their area. A Ministerial appointed Consultative Committee which represents all relevant interests prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Groundwater - This dataset displays Victoria's groundwater Water Supply Protection Areas (WSPAs), and was originally prepared for Groundwater and Licensing Branch DSE, by LICS (Land Information Cartographic Services). Boundaries generaterd by LICS and Melbourne Water. Subsequent revisions have been undertaken by GLiB and the Rural Water Corporations.

Purpose

WSPAs are areas that have been (or are proposed to be) proclaimed under the Water Act 1989 for the purpose of establishing a management plan. The aim of the plan is to manage the groundwater resources of the WSPA equitably and to ensure the long-term sustainability of the resource. An extensive consultative process guarantees that groundwater users have a major input into the development of the Groundwater Management Plan for their area. A Ministerial appointed Consultative Committee, which represents all relevant interests, prepares the Plan. In an area where farming predominates, farmers who own or occupy farming land in the area must comprise at least half of the membership of the committee.

Dataset History

GMA- This data has been derived by DEPI's Groundwater and Licensing Branch (GLiB) and the Rural Water Corporations.

WSPA -Boundaries generated by LICS and Melbourne Water. Subsequent revisions have been undertaken by the Groundwater and Licensing Branch (GLiB) and the Rural Water Corporations.

The polygons within this dataset were selected from the larger statewide sets (named above and in the Lineage) based on their spatial location within the Gippsland project boundary (GUID 27413de5-d13a-4231-ac79-fc77f4cbb5f7). Process involved ArcGIS Select by location tool. The selected subsets were merged into one file.

This subset has been superseded by

GMA and WSPA boundaries in Gippsland - geodatabase v2 (bfb32a2e-bf93-4c6a-a361-1817e85ddba9).

Dataset Citation

Bioregional Assessment Programme (XXXX) GMA and WSPA boundaries in Gippsland - geodatabase. Bioregional Assessment Derived Dataset. Viewed 05 October 2018, http://data.bioregionalassessments.gov.au/dataset/916c6e0f-1207-47a0-8451-6c830e52e8a4.

Dataset Ancestors

• Derived From Victorian Water Supply Protection Areas

• Derived From Victorian Groundwater Management Areas

The Office of the State Engineer Declared Groundwater Basin map layer closely follow the legal desciptions. However, these boundaries are approximations. For a more accurate description please refer to Article 7 of the "Rules and Regulations Governing the Appropriation and Use of Ground Water in New Mexico." A Declared Groundwater Basin is an area declared by the State Engineer to be underlain by a groundwater source with reasonably defined boundaries. By declaration the State Engineer assumes jurisdiction over the appropriation and use of groundwater from that source.

The County Musgrave Proclaimed Wells Area on Eyre Peninsula, situated mainly near Elliston and extending eastwards towards Lock, contains a number of small groundwater lenses of potable quality which are surrounded by brackish to saline... The County Musgrave Proclaimed Wells Area on Eyre Peninsula, situated mainly near Elliston and extending eastwards towards Lock, contains a number of small groundwater lenses of potable quality which are surrounded by brackish to saline groundwater. A potable groundwater lens here is defined as groundwater with a salinity of <1000 mg/l contained within the Quaternary Limestone sequence. Only one lens, Polda, is currently used: the other lenses have been reserved by the Minister for Environment and Natural Resources for any future augmentation of the current reticulated water supply for Eyre Peninsula. A re-appraisal of groundwater resources of County Musgrave was required, due to the potential competing use of the water for processing a kaolin deposit at Poochera. The mine-site processing of the clay would require a supply of ~300 Ml/year of water having a salinity of <6000 mg/l. This study builds upon previous work done by MESA and EWS, to obtain a greater understanding of groundwater resources in the region. A number of techniques have been used in the investigation including drilling, groundwater monitoring, geophysics, isotope geochemistry and the development of a spatial database. The specific objectives were to: - develop a conceptual understanding of groundwater resources in the region; - review the historical groundwater response to climatic variations and extraction; - develop better understanding of the hydraulics and recharge mechanisms of the system; and - reassess the sustainable yield of the potable groundwater lenses.

Purpose: Management of Groundwater resources in Western Australia. Groundwater Resources stored in WRIMS (Water Resource Information Management System). The intersection of groundwater Subareas with …Show full descriptionPurpose: 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.

Mapping bringing together information from the 2009-2015 Hydrological Plans and the 2015-2021 Hydrological Plans of the Andalusian Intra-Community River Basin Districts (Andalusian Mediterranean Basins, Guadalete-Barbate and Tinto-Odiel-Piedras). The original information of the Plans has been modified for inclusion in the application "Agua0" (processor of concession files). The modifications have consisted mainly in the unification of layers (of the different basins) that share the same theme and the addition of fields in some of them. A new layer called "affections" has been created, which brings together most of the themes that are collected in the rest of the layers. Includes the following layers: conditions, intra-Community river basin districts, exploitation systems and subsystems, surface water bodies, groundwater bodies, protected areas, contributing basins and declared areas of interest. In addition, a layer of total permeability of Andalusia (created by the IGME) has been incorporated, as well as the layer of Andalusian hydrogeological units, two layers with the delimitation of the Guaro Plan and the Guadalhorce Plan and three other layers with areas declared overexploited. It also includes the layer of the Community of Irrigators of the Guadalete basin. Finally, and as a support, a layer has been created to signal the possible police area from the MDT 10,000.

Water Control Districts (WCDs) are areas declared where there is a need for enhanced management for the sustainability of groundwater and surface water resources. Under the Northern Territory Water Act 1992, the Minister can declare WCDs. WCDs are declared in areas where there is a high level of competition for water and/or require closer management of the water resources. Within the WCD a bore construction permit is required, water allocation plans can be developed and water extraction licences are required unless there is a specific exemption in place. There are 8 declared water control districts in the Northern Territory: - Darwin Rural declared 2 June 1999 - Gove declared 18 September 2002 - Daly Roper Beetaloo declared 22 June 2018 - Tenant Creek declared 15 July 2009 - Western Davenport declared 15 July 2009 - Ti Tree declared 21 October 2009 - Alice Springs declared 4 July 2007 - Great Artesian Basin declared 3 February 2010

The Padthaway region has since the mid-1950's been an important area for irrigation of pasture, seed crops, vegetables and later vines. A shallow highly transmissive unconfined aquifer provides good quality groundwater for irrigation. Groundwater... The Padthaway region has since the mid-1950's been an important area for irrigation of pasture, seed crops, vegetables and later vines. A shallow highly transmissive unconfined aquifer provides good quality groundwater for irrigation. Groundwater use is controlled under the Water Resources Act (1990) by means of a crop-area and crop water use system. SADME established a water level and water quality monitoring network in 1970 although rigorous water quality data is only available since 1978. Over this period, water level fluctuation trends on the flats west of the Naracoorte Range and for some distance into the foothills generally parallel rainfall trends. Further east into the Range, the water table has been consistently rising since at least 1971, with increased recharge due to vegetation clearance contributing to this phenomenon. In the eastern two-thirds of the Proclaimed Wells Area groundwater salinities are increasing whilst they are decreasing in the western one-third. The monitoring data do not support a change in current management policies for the area by increasing or decreasing licence allocations.

CONTACTS FOR THIS RECORD

Investigations since 1984 have assessed the groundwater availability. The groundwater supplies are obtained from an extensive unconfined aquifer. The investigations included drilling of investigation wells, aquifer testing, studies of the recharge... Investigations since 1984 have assessed the groundwater availability. The groundwater supplies are obtained from an extensive unconfined aquifer. The investigations included drilling of investigation wells, aquifer testing, studies of the recharge rate in the area and monitoring of groundwater levels and quality.

The groundwater resources of the Tertiary sand aquifer in the County Musgrave Proclaimed Wells Area (PWA) have been reviewed in order to assess the potential for their use to augment groundwater currently extracted from the unconfined Quaternary... The groundwater resources of the Tertiary sand aquifer in the County Musgrave Proclaimed Wells Area (PWA) have been reviewed in order to assess the potential for their use to augment groundwater currently extracted from the unconfined Quaternary limestone aquifer. The Tertiary sand aquifer is a confined aquifer where it is overlain by the Quaternary limestone aquifer, and semi-confined to unconfined in other parts of the PWA. The groundwater quality varies significantly throughout the area, ranging from 500 mg/l to in excess of 35 000 mg/l. Yields range from 1 to 10 l/s due to the variation in permeability within the Tertiary sand. Results from aquifer tests indicate that transmissivities of the Tertiary sand aquifer vary from 20 to 270 m3/day/m. This report concludes that there is the potential to extract low salinity water from the Tertiary sand aquifer, via a network of low-yielding wells, to au gment the water supply for Eyre Peninsula. It is important that this is done in conjunction with close monitoring of both the Quaternary and Tertiary aquifers. If the Tertiary sand aquifer was to be considered for use as part of the reticulated supply, then further work would be required to fully prove the resource.

The Naracoorte Ranges Prescribed Wells Area (PWA) is 300 km SE of Adelaide, and covers about 2400 square km. The PWA consists of a low-lying interdunal flat in the SW, and an elevated highlands area in the NE, separated by the Kanawinka Fault.... The Naracoorte Ranges Prescribed Wells Area (PWA) is 300 km SE of Adelaide, and covers about 2400 square km. The PWA consists of a low-lying interdunal flat in the SW, and an elevated highlands area in the NE, separated by the Kanawinka Fault. The unconfined and confined aquifers are both present and the main water resource is the regionally unconfined Gambier Limestone Formation aquifer in the Naracoorte highlands. Beneath the interdunal flat, groundwater flow is generally through the Padthaway and Bridgewater Formations. Salinity ranges between 900 and 2500 mg/L. Well yields range from 50 to 100 L/s. The unconfined and confined aquifers are separated by a relatively thick, low permeability aquitard, and can be managed independently. The confined aquifer is used only for the Naracoorte town water supply. Salinity is around 1200 to 1400 mg/L. The PWA was proclaimed in 1986 following the passing of the Groundwater Border Agreement Act 1985. An additional area was also included so that the western boundary adjoined the Padthaway PWA. In 1993, the PWA was expanded to include the Naracoorte Plains (Hundreds of Naracoorte and Robertson). The total allocation for the 1998/1999 season was 77 871 ML and water use was estimated to be 38 982 ML, about half of the total allocation. The accuracy of this figure is debatable, as the water use figure is not the actual volume extracted, but an estimate of crop water usage. There are currently 73 observation wells in the water level monitoring network. There are two salinity monitoring networks, a Government operated network and a private irrigation network. The combined total of observation wells is 79. Generally the networks are adequate. In the highlands, water levels are rising by up to 26 cm/yr. Hydrographs show the greatest rise has occurred since the early 1980s, due to clearance of native vegetation by early European settlers, and the failure of lucerne crops in the mid-1970s. Associated with the rising water table is an increase in salinity. The depth to water in the areas where the highest increase has occurred is now about 15 to 20 metres. At the present rate of increase, water levels are unlikely to have any significant affect on the water resource. The increase in groundwater salinity, while currently acceptable, may have long-term implications. The impact that the use of water from one resource may have on another resource was considered in the following situations: - the impact of using surface waters to artificially replenish the groundwater system. - the impact that taking groundwater from the unconfined aquifer may have on the confined aquifer. - the impact that taking groundwater from the confined aquifer may have on the unconfined aquifer. None of the scenarios were considered to have significant impacts on the water resource, or across water management boundaries.

The main source of irrigation water in the intensely irrigated area of the Padthaway Proclaimed Wells Area is groundwater extracted from the underlying unconfined aquifer. Excess irrigation water, that is, water applied to the crops but not used,... The main source of irrigation water in the intensely irrigated area of the Padthaway Proclaimed Wells Area is groundwater extracted from the underlying unconfined aquifer. Excess irrigation water, that is, water applied to the crops but not used, infiltrates back down into the aquifer, and is enriched in dissolved salts. Over time, continued repetition of this process has caused a significant deterioration in the quality of the underlying groundwater. The Padthaway Irrigation Area is one of the State's main viticultural districts, and continued groundwater degradation will have a severe impact on present levels of productivity. The local community, together with government departments involved in the groundwater sector, have collectively put forward a number of possible options to halt the present rate of salinity degradation. One of these options is to extract lower salinity groundwater from the adjacent Naracoorte Range, and use it to supply the main irrigation area. This report presents the results of a hydrogeological assessment to determine the viability of this option. Results of the assessment suggest that better quality groundwater is available in the Range, and the aquifer represents a good potential source for groundwater extraction. However, inherent properties related to the aquifer, such as the high proportion of fine sand produced from some pumped wells, and low well yields due to the spatial variability in hydraulic conductivity of the aquifer, make it difficult to accurately predict the suitability of this proposal on an individual well basis.

The Comaum-Caroline Prescribed Wells Area (PWA) is 400 km SE of Adelaide, and covers about 1900 square km. It consists of a coastal plain which rises to almost 70 m above sea level in the north of the area. In the far NE the Kanawinka Fault... The Comaum-Caroline Prescribed Wells Area (PWA) is 400 km SE of Adelaide, and covers about 1900 square km. It consists of a coastal plain which rises to almost 70 m above sea level in the north of the area. In the far NE the Kanawinka Fault separates the plain from the Naracoorte Ranges. Unconfined and confined aquifers are both present and the main water resource is the unconfined aquifer (predominantly Gambier Limestone formation). Salinity ranges between 300 and 1000 mg/L. The PWA was proclaimed in 1986. There were originally 5 water management Sub-areas but there have been recent subdivisions to manage declining water levels. The total water allocation for the 1998/99 year was 78 093 ML, with an estimated water usage of 37 316 ML, about half the total allocation. The accuracy of this figure is debatable, as water use is estimated from crop figures supplied by the irrigator, and determined on the crop water use ratio system. Stock water use is only a minor contributor to the overall water budget (ie 1960 ML). There are currently 104 unconfined aquifer wells, measured quarterly in the water level monitoring network, and 49 wells in the unconfined aquifer salinity monitoring network. There are 10 confined aquifer water level and salinity monitoring wells. The networks have recently been increased and should meet the monitoring requirements. The impact that water use from one resource may have on another resource was considered in the following situations: - the impact of using surface water to artificially replenish the groundwater system. - the impact taking of groundwater from the unconfined aquifer may have on the confined aquifer. - the impact taking of groundwater from the confined aquifer may have on the unconfined aquifer. In the first scenario there is the potential for groundwater contamination to occur to the unconfined aquifer as a result of applying animal bi-products, agricultural chemicals and fertilisers in the southern portion of the PWA. In the second scenario the Nangwarry-Tarpeena area is heavily forested, resulting in very little recharge to the unconfined aquifer. This may also impact on the water resources of the confined aquifer. The third scenario is of limited relevance.