Australian Water Information Dictionary

Alphabetical list of items

A   B   C   D   E   F   G   H   I   K   L   M   N   O   P   Q   R   S   T   U   V   W   Y   Z   other  

E

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electrical conductivity

This definition applies to:

A region where similar processes determine the interaction between groundwater and ecosystems, due to similar ecology, geology, climate, and groundwater/surface water connections.

Related: EHZ

This definition applies to:

Description of the water regimes needed to sustain the ecological values of water-dependent ecosystems at a low level of risk.

Source: adapted from definition for Environmental Water Requirements in ARMCANZ & ANZECC 1996, National principles for the provision of water for ecosystems, Sustainable Land and Water Resources Management Committee Subcommittee on Water Resources Occasional Paper SWR No 3 July 1996

Related: EWR

This definition applies to:

A dynamic complex of plant, animal and micro-organism communities and their non-living environment interacting as a functional unit.

Source: Commonwealth Environmental Protection and Biodiversity Conservation Act 1999

This definition applies to:

Exposure Draft of Australian Water Accounting Standard 1

This definition applies to:

eco-hydrogeological zone

Related: eco-hydrogeological zone

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Refers to the extensive warming of the central and eastern Pacific Ocean that leads to a major shift in weather patterns across the Pacific. In Australia (particularly eastern Australia), El Niño events are associated with an increased probability of drier conditions. See the Weather and Climate page on El Niño for more information.

Related:

This definition applies to:

The oscillation between the El Niño climate phase and the La Niña climate phase, or opposite phase, usually over several years. See the Weather and Climate page on ENSO for more information.

Related:

This definition applies to:

There are multiple contexts for this item

Context 1

In relation to water, means the capacity of the water to transmit a flow of electricity and is a common measure of the salinity of the water.

This definition applies to:

Context 2

Electrical conductivity (EC) measures dissolved salt in water. The standard EC unit is microSiemens per centimetre (µS/cm) at 25 °C.

Source: National Water Commission Water Dictionary

This definition applies to:

A format that is machine readable, but does not include scanned documents.

Source: Water Regulations 2008 Regulation 1.03

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A closed surface water drainage basin that retains water and has no outflow to the sea.

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A column of depth cells equivalent to a vertical in conventional current meter gauging. An ensemble or profile may refer to a single measurement of the water column or an average of pings or profile measurements.

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A collection or distribution of many forecasts for the same period and location. They can be generated from many models or from one model with many parameter sets.

This definition applies to:

A jurisdictional gazetted instrument (e.g. Water Sharing Plan), subordinate to the overarching State or Territory water rights legislation, intended to share the portion of the total water resource it covers.

This definition applies to:

Water Access Entitlements held for the benefit of the environment. They may include entitlements of a specific environmental class and non specific classes of entitlement.

Related: water access entitlements

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Allocations announced on entitlements held for the environment.

This definition applies to:

The streamflow required to maintain appropriate environmental conditions in a waterway or water body.

This definition applies to:

Instruments in place to achieve the environmental water determination, e.g. environmental water storage release rules, water access rules to limit abstractions, rules on diversion to wetlands and annual environmental watering plans.

This definition applies to:

The environmental objectives or water regime that will be provided to meet the appropriate ecological values. The water regime is defined in terms of specific water level or flow criteria at key representative sites, which together form the Environmental Water Provisions (EWP).

This definition applies to:

Water level or water flow with its timing and location that has been determined or delivered for the benefit of the environment

This definition applies to:

The specific water level or flow criteria at key representative sites that the environmental water regime is set to achieve as part of the environmental water determination. They may meet in part or in full the environmenal water regimes requirements.

This definition applies to:

Water regime for the benefit of the environment.

This definition applies to:

The water regime needed to maintain ecological values of water dependent ecosystems at a low level of risk.

This definition applies to:

Water released from infrastructure, such as a surface water storage, for the benefit of the environment.

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Something which only lasts for a short time. Typically used to describe rivers, lakes and wetlands that are intermittantly dry.

This definition applies to:

A software development company based in the United States that builds ArcGIS.

Related: ArcGIS

This definition applies to:

A format for storing GIS data within the ArcGIS software.

Related: Geographic Information System (GIS)

This definition applies to:

evapotranspiration

The sum of evaporation and plant transpiration from the earth’s land surface to the atmosphere.

This definition applies to:

A process which occurs at a liquid surface resulting in a change of state from liquid to vapour. In relation to water resource assessment and water accounting, evaporation refers to the movement of water from the land surface (predominantly liquid) to the atmosphere (water vapour). The liquid water at the land surface that may be available for evaporation includes surface water, soil water, water within vegetation and water on vegetation and paved surfaces.

Related:

This definition applies to:

There are multiple contexts for this item

Context 1

The sum of evaporation and plant transpiration from the earth’s land surface to the atmosphere.

This definition applies to:

Context 2

The combined loss of water from a given area during a specified period of time by evaporation from the soil or water surface and by transpiration from plants.

Source: Australian and New Zealand Guidelines for Fresh and Marine Water Quality (2000)

Synonym: evapotranspiration

This definition applies to:

Environmental Water Provisions

This definition applies to:

ecological water requirement

Related: ecological water requirement

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The forecast probability that a particular streamflow value will be exceeded.

For example there is a 60% forecast probability that a total streamflow volume of 25 gigalitres for Acheron River at Taggerty will be exceeded in the forecast period October–December 2009.

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The measure of the energy received per unit area.

Source: Water Regulations 2008 Schedule 3 Part 1

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A transaction to transfer a water right from one legal entity to another out of a specified area. The area can be a water system, water management area or a trading zone as defined in respective State and Territory legislation.

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Synonymous with abstraction in case the water is removed from the groundwater store.

Synonym: abstraction

This definition applies to: