Australian Water Information Dictionary

Acronyms

/

Australian Capital Territory

This definition applies to:

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).

This definition applies to:

acoustic Doppler current profiler

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

This definition applies to:

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).

This definition applies to:

acoustic Doppler velocity meter

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

This definition applies to:

annual exceedance probability

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

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.

This definition applies to:

Australian Hydrological Geospatial Fabric (Geofabric)

Source: Geofabric Product Guide V2.0

Related: Geofabric

This definition applies to:

Australian Integrated Forecast System

This definition applies to:

Adopted Middle Thread Distance

This definition applies to:

Australian National Committee on Large Dams

This definition applies to:

Australian National University

Related: ANUDEM

This definition applies to:

Australia New Zealand Land Information Council

This definition applies to:

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.

Australian rainfall and runoff

This definition applies to:

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

This definition applies to:

Australian Soil Resource Information System

This definition applies to:

Auditing and Assurance Standards Board

This definition applies to:

Australian Water Resources Assessment

This definition applies to:

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

This definition applies to:

Australian Water Resources Council

This definition applies to:

Australian Water Resources Information System

This definition applies to:

Bayesian joint probability

A modelling system that uses statistical methods to produce predictions of seasonal streamflows. BJP was developed by the Commonwealth Scientific and Industrial Research Organisation (CSIRO). See the Seasonal Streamflow Forecast Research papers section for more information.

Alt text

This definition applies to:

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.

This definition applies to:

computerised design IFD rainfall system

This definition applies to:

continuous ranked probability score

A skill score calculated in the original measurement space. Both the forecast and the observation are converted to cumulative density functions. In the case of the observation, this is a step function. The area between the two functions is the single CRPS value, which is averaged across all forecasts. Alt text

This definition applies to:

Commonwealth Scientific and Industrial Research Organisation

This definition applies to:

comma separated values.

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

This definition applies to:

cease to flow

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

This definition applies to:

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.

This definition applies to:

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:

This definition applies to:

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:

This definition applies to:

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.

This definition applies to:

Data Product Specification based on ISO 19139

Related: ISO

This definition applies to:

electrical conductivity

This definition applies to:

Exposure Draft of Australian Water Accounting Standard 1

This definition applies to:

eco-hydrogeological zone

Related: eco-hydrogeological zone

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:

Environmental Water Provisions

This definition applies to:

ecological water requirement

Related: ecological water requirement

This definition applies to:

full scale deflection

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

This definition applies to:

Full Supply Level

This definition applies to:

Geoscience Australia

This definition applies to:

Great Artesian Basin

This definition applies to:

groundwater dependent ecosystem

This definition applies to:

groundwater flow system

This definition applies to:

gigalitre

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

Related: gigalitre (GL)

This definition applies to:

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.

This definition applies to:

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.

This definition applies to:

General Purpose Water Accounting Report

This definition applies to:

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.

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.

groundwater treatment plant

This definition applies to:

revised generalised tropical storm method

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

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

This definition applies to:

Interim Aquifer Framework

Source: Geofabric Product Guide V2.0

Related:

This definition applies to:

International Accounting Standards Board

This definition applies to:

inflow dependence

This definition applies to:

Inflow Dependent Ecosystem

This definition applies to:

intensity-frequency-duration

This definition applies to:

Interim Groundwater Data

Source: Geofabric Product Guide V2.0

Related:

This definition applies to:

International Recommendations for Water Statistics

This definition applies to:

International Organization for Standardization

This definition applies to:

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.

This definition applies to:

The abbreviation for metre(s).

This definition applies to:

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

Related: Australian height datum

This definition applies to:

Murray–Darling Basin

This definition applies to:

Map Grid of Australia 1994

This definition applies to:

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

This definition applies to:

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

This definition applies to:

Minimum Supply Level

This definition applies to:

mean seasonal storage range

Related: mean seasonal storage range

This definition applies to:

National Catchment Boundaries

Source: Geofabric Product Guide V2.0

Related:

This definition applies to:

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

This definition applies to:

natural resource management

This definition applies to:

New South Wales

This definition applies to:

National Water Commission

This definition applies to:

National Water Initiative

This definition applies to:

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).

This definition applies to:

probable maximum flood

Related: probable maximum precipitation (PMP)

This definition applies to:

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

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).

This definition applies to:

Queensland Water Commission

This definition applies to:

reduced level

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

This definition applies to:

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.

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.

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

This definition applies to:

South East / southeast

This definition applies to:

system of integrated environmental-economic accounting

This definition applies to:

system of environmental-economic accounting for water

This definition applies to:

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

This definition applies to:

sea surface temperature

This definition applies to:

Statement of Water Accounting Concepts

This definition applies to:

total dissolved solids

This definition applies to:

Unified Modelling Language

This definition applies to:

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.

This definition applies to:

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.

This definition applies to:

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

This definition applies to:

Water Information Research and Development Alliance

This definition applies to:

water resource plan area

This definition applies to:

water treatment plant

This definition applies to:

wastewater treatment plant

This definition applies to: