Australian Water Information Dictionary

Acronyms

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ACT

Australian Capital Territory

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ADC

acoustic Doppler current meter

A point velocity meter that uses two acoustic transducers, each acting as transmitters and receivers for the purpose of water velocity measurement, when undertaking a discrete discharge measurement (gauging).

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ADCP

acoustic Doppler current profiler

A family of acoustic based instrumentation used to measure water velocities and water depths during a discrete discharge measurement (gauging).

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ADV

acoustic Doppler velocimeter

A point velocity meter that uses a single acoustic transducer as a transmitter and separate dedicated transducers as receivers for the purpose of water velocity measurement, when undertaking a discrete discharge measurement (gauging).

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ADVM

acoustic Doppler velocity meter

A family of acoustic based instrumentation used for continuous in-situ measurement of water velocities.

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AEP

annual exceedance probability

The probability that a given rainfall total accumulated over a given duration will be exceeded in any one year.

AHD

Australian Height Datum

The datum that sets mean sea level as zero elevation. Mean sea level was determined from observations recorded by 30 tide gauges around the coast of the Australian continent for the period 1966–1968. See Geoscience Australia for further information.

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AHGF

Australian Hydrological Geospatial Fabric (Geofabric)

Source: Geofabric Product Guide V2.0

Related: Geofabric

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AIFS

Australian Integrated Forecast System

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AMTD

Adopted Middle Thread Distance

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ANCOLD

Australian National Committee on Large Dams

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ANU

Australian National University

Related: ANUDEM

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ANZLIC

Australia New Zealand Land Information Council

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ARI

average recurrence interval

The average or expected value of the periods between exceedances of a given rainfall total accumulated over a given duration. It is implicit in this definition that the periods between exceedances are generally random.

ARR

Australian rainfall and runoff

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ASCII

American Standard Code for Information Interchange. A character-encoding that represents text in computers.

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ASRIS

Australian Soil Resource Information System

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AUASB

Auditing and Assurance Standards Board

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AWRA

Australian Water Resources Assessment

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AWRA-L

A part of the AWRA Modelling System developed by CSIRO under the WIRADA alliance with the Bureau that represents landscape water balance.

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AWRC

Australian Water Resources Council

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AWRIS

Australian Water Resources Information System

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BT

bottom tracking

Acoustic method used to measure boat speed and direction by computing the Doppler shift of sound reflected from the stream bed relative to the ADCP.

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CDIRS

computerised design IFD rainfall system

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CSIRO

Commonwealth Scientific and Industrial Research Organisation

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CSV

comma separated values.

A computer text file where numbers are written as characters separated by commas.

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CTF

cease to flow

The level or physical location at which a stream stops flowing, the lowest point in the low flow control.

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CV

coefficient of variation

A normalized measure of dispersion of a probability distribution. The coefficient of variation is the ratio of the standard deviation to the mean.

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D8-9S

GEODATA 9 Second Flow Direction Grid derived from DEM-9S. A grid describing the principal directions of surface drainage across the whole of Australia.

Source: Geoscience Australia

Related:

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DEM-9S

GEODATA 9 Second Digital Elevation Model. A grid of ground level elevation points covering the whole of Australia with a grid spacing of 9 seconds in longitude and latitude (approximately 250 metres) in the GDA94 coordinate system.

Related:

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DGPS

Differential Global Positioning System

An enhancement to Global Positioning System (GPS) that uses a network of fixed ground based reference stations to broadcast the difference between the positions indicated by the satellite systems and the known fixed positions.

The underlying premise of differential GPS is that any two receivers that are relatively close together will experience similar atmospheric errors. DGPS requires that a GPS receiver be set up on a precisely known location. This GPS receiver is the base or reference station. The base station receiver calculates its position based on satellite signals and compares this location to the known location. The difference is applied to the GPS data recorded by the second GPS receiver, which is known as the roving receiver. The corrected information can be applied to data from the roving receiver in real-time in the field using radio signals or through post-processing after data capture using special processing software.

Source: ESRI, viewed 17 April 2013. Copyright © 1995–2013 Esri.

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DPS

Data Product Specification based on ISO 19139

Related: ISO

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EC

electrical conductivity

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ED AWAS 1

Exposure Draft of Australian Water Accounting Standard 1

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EHZ

eco-hydrogeological zone

Related: eco-hydrogeological zone

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ET

evapotranspiration

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

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EWP

Environmental Water Provisions

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EWR

ecological water requirement

Related: ecological water requirement

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FSD

full scale deflection

The full range of observations which can be recorded by an instrument.

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FSL

Full Supply Level

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GA

Geoscience Australia

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GAB

Great Artesian Basin

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GDE

groundwater dependent ecosystem

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GFS

groundwater flow system

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GL

gigalitre

1,000 megalitres, which also is 1,000,000,000 litres.

Related: gigalitre (GL)

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GMU

groundwater management unit

An area delineated for the management of groundwater based on similar resource characteristics (for example rock type and watertable depth) and management rules that may be applied.

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GPS

Global Positioning System

A system of radio-emitting and -receiving satellites used for determining positions on the earth. The orbiting satellites transmit signals that allow a Global Positioning System receiver anywhere on earth to calculate its own location through trilateration. Developed and operated by the U.S. Department of Defense, the system is used in navigation, mapping, surveying, and other applications in which precise positioning is necessary.

Source: ESRI GIS Dictionary, viewed 15 April 2013, Copyright © 1995–2013 Esri.

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GPWAR

General Purpose Water Accounting Report

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GSAM

generalised southeast Australia method

Appropriate for estimating probable maximum precipitation in regions of Australia where tropical storms are not the source of the greatest rainfall depths and where topographic influences vary markedly.

GSDM

generalised short-duration method

Appropriate for estimating probable maximum precipitation for durations up to six hours and for an area of less than 1000 square kilometres.

GTP

groundwater treatment plant

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GTSMR

revised generalised tropical storm method

Appropriate for estimating probable maximum precipitation in regions of Australia affected by tropical storms.

HDOP

horizontal dilution of precision

A measure of the geometric quality of a GPS satellite configuration in the sky. Horizontal Dilution of Precision is a factor in determining the relative accuracy of a horizontal position. The smaller the dilution of precision number, the better the geometry.

Source: ESRI GIS Dictionary, viewed 4 April 2013, Copyright © 1995–2013 Esri.

Related: PDOP

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IAF

Interim Aquifer Framework

Source: Geofabric Product Guide V2.0

Related:

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IASB

International Accounting Standards Board

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ID

inflow dependence

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IDE

Inflow Dependent Ecosystem

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IFD

intensity-frequency-duration

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IGWD

Interim Groundwater Data

Source: Geofabric Product Guide V2.0

Related:

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IRWS

International Recommendations for Water Statistics

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ISO

International Organization for Standardization

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IVR

index velocity rating

The computation of discharge using measured water velocities that are an index or predictor of the mean channel velocity.

Note: More than one variable may be used in the creation of a rating if this would improve the accuracy of the overall rating.

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m

The abbreviation for metre(s).

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mAHD

The abbreviation for elevation in metres with respect to the Australian Height Datum.

Related: Australian height datum

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MDB

Murray–Darling Basin

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MGA94

Map Grid of Australia 1994

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ML

The abbreviation for megalitre. One megalitre is equal to one million litres.

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ML/d

The abbreviation for megalitres per day. A unit of measure for instantaneous discharge (rate unit).

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MSL

Minimum Supply Level

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MSSR

mean seasonal storage range

Related: mean seasonal storage range

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NCB

National Catchment Boundaries

Source: Geofabric Product Guide V2.0

Related:

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NHDPlus

National Hydrography Dataset Plus. A geospatial hydrological system implemented in the United States.

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NRM

natural resource management

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NSW

New South Wales

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NWC

National Water Commission

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NWI

National Water Initiative

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PDOP

positional dilution of precision

A measure of the geometric quality of a GPS satellite configuration in the sky. A PDOP value measures the possible error in both the horizontal and vertical plane (altitude).

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PMF

probable maximum flood

Related: probable maximum precipitation (PMP)

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PMP

probable maximum precipitation

The greatest depth of precipitation for a given duration meteorologically possible for a given size storm area at a particular location at a particular time of the year, with no allowance made for long-term climatic trends.

Related: PMF

PVM

Point Velocity Meter

A family of hand held acoustic based instrumentation used to measure water velocities and water depths during a discrete discharge measurement (gauging).

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QWC

Queensland Water Commission

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RL

reduced level

The surveyed level of a location relative to a datum (after survey calculations have been completed).

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RMSE

root mean squared error

The square error (SE) is the difference between the observed value and median of the forecast. The RMSE score is the square root of the average SE for a set of forecasts.

RMSEP

root mean squared error in probability

The square error in probability (SEP) is the difference between the historical probabilities of the observed value and median of the forecast. The RMSEP score is the square root of the average SEP for a set of forecasts.

S/N

signal to noise ratio

A measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power. A ratio higher than 1:1 indicates more signal than noise.

Synonym: SNR

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SE

South East / southeast

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SEEA

system of integrated environmental-economic accounting

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SEEAW

system of environmental-economic accounting for water

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SNR

signal to noise ratio

A measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power. A ratio higher than 1:1 indicates more signal than noise.

Synonym: S/N

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SST

sea surface temperature

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SWAC

Statement of Water Accounting Concepts

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TDS

total dissolved solids

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UML

Unified Modelling Language

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USGS

United States Geological Survey

An American science organisation that provides impartial information on the health of U.S. ecosystems and environment, the natural hazards that threaten the U.S., the natural resources the U.S. relies on, the impacts of climate and land-use change, and the core science systems that help the U.S. provide timely, relevant, and useable information.

Source: Modified from USGS, viewed 27 April 2013.

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WDTF

Water Data Transfer Format

WDTF is an XML data transfer format designed to support the water industry to share and deliver water data to the Bureau as required under the Water Regulations 2008.

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WGS84

World Geodetic System 1984.

For most practical purposes GDA94 and WGS84 coordinates can be considered the same and no transformation is required.

Source: Inter-governmental Committee on Surveying and Mapping, viewed 3 May 2013.

Related: GDA94

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WIRADA

Water Information Research and Development Alliance

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WRPA

water resource plan area

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WTP

water treatment plant

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WWTP

wastewater treatment plant

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