- About Us
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
- Australian Geodetic Datum -
the framework used for coordinates in Australia since 1966. It is now superseded by the Geocentric Datum of Australia (GDA). Geoscience Australia More information
- Australian Height Datum -
the datum used for the determination of elevations in Australia. The
determination used a national network of bench marks and tide gauges, and set
mean sea level as zero elevation. Geoscience Australia
- Volume of water entitlement
to the holder of a Water licence.
- Australian Map Grid - a
Cartesian coordinate system based on the Universal Transverse Mercator
projection and the Australian Geodetic Datum (1966). The unit of measure is
the metre. Geoscience Australia Now superseded by MGA94
- An underground geologic water-bearing formation capable of transmitting quantities of water to bores or other abstraction facilities. An
underground geologic water-bearing formation capable of transmitting
quantities of water to bores or other abstraction facilities.
- Australian Water Information Dictionary published by the Bureau of Meteorology.
- An established mark, the
elevation of which should be related, where practicable, to a national datum.
Within Australia, the Australian Height Datum (AHD) is the adopted standard.
- The volume of allocation
unused in one season that is available to an individual user in the following
- A solid length of pipe,
typically PVC plastic used to keep a bore open in alluvial sediments, sand
dunes or unstable rock.
- The area from which a
surface watercourse or a groundwater system derives its water. A Dictionary
of Earth Sciences, Oxford Univ. Press 1999
- commenced date
- The date when the drilling
of a groundwater work commenced
- The date when the drilling
of a groundwater work was completed
- Refers to how a groundwater
work has been constructed (see casing)
- See electrical conductivity.
- Refers to alluvial
sediments which have been compacted and consolidated to for a sedimentary
- construction method
- The drilling method by
which a groudwater work (i.e. bore or well) was constructed
- In this context
"continuous" refers to measurements taken at discrete time
intervals that are small enough to make it possible to obtain/interpolate
values between the time intervals with confidence.
- The physical properties of
a cross-section or a reach of a natural or artificial channel that governs
the relation between stage and discharge at a location in the channel.
- coordinate source
- Refers to the source from
which a location was derived (e.g. topographic map, GPS)
- coordinate, geographic
system of spherical coordinates for describing the positions of points on the
earth. The declinations and polar bearings in this system are the latitudes
and longitudes respectively. Geoscience Australia
- coordinate, grid
- Geographical coordinates
projected to a plane (e.g. MGA94). Coordinates are expressed as zone,
- One of
141 basic divisions of the State of New South Wales, further divided into
parishes, for administrative purposes, especially for management and disposal
of Crown lands. Dept Lands
- Draw down level, the level
in metres below the ground to which the standing water level reaches during
- Downstream of the reference
- A structure built across a
drainage system to store surface water flow. May be used to refer to both
small and large structures.
- The following date format
is used: DD/MM/YYYY.
- Sometimes called analyte,
parameter, test, species, element, property, etc., it is something determined
or tested for in water samples. Some examples are pH, nitrate, copper, faecal
coliforms, hardness, conductivity and chloroform. NZ Ministry of Health
- The volume of water that
passes a given location within a given period of time. (USGS glossary)
Usually expressed in megalitres per day (ML/d).
The terms discharge and flow are used interchangeably.
the context of sampling or measurement "discrete" refers to an
isolated measurement. It is not possible to obtain/ interpolate a value
between other discrete samples/ measurements and infer continuous values.
- The process of contacting
an external logging device and obtaining data for a specified period, e.g.,
download the previous day's readings.
- DP (Deposited Plan)
- A plan
of land deposited in Land and Property Information, Department of Lands,
which was not attached to a dealing or deed nor lodged for the purposes of a
strata scheme. The Registrar General may, for convenience, number or
re-number other plans as deposited plans or prepare deposited plans of his
own motion. Dept Lands
- The X-coordinate (the
vertical lines that divide the map from west to east), and get larger to the
east. See Coordinates, Grid
- A measure of the ability of
water to conduct an electric current between electrodes placed in a sample of
the water; the value obtained relates
to the nature and amount of salts present in the water and increases with
concentration. Electrical conductivity is used as a surrogate measure for salinity. EC results are all compensated to 25°C. Usually expressed in microsiemens per centimetre (μS/cm).
- In this context, elevation
typically relates to the level of the ground surface, water surface level in
a stream or storage. Usually expressed in metres above mean sea level (m) as
defined by the Australian Height Datum (AHD).
- Refers to the method by
which the elevation was measured (e.g. surveyed).
- A device that translates
water level movement into computer-readable data.
- final depth
- The depth to which a
groundwater work was completed (i.e. constructed to). This may vary from the
- See discharge.
- The form used by
groundwater drillers to log particulars about bores drilled. Detail on this
form is the basis of the Groundwater Work Summary Report
- Refers to the aquifer type
which is provided by the voids formed by fractures, joints and partings.
- gauge height
- The height of the water
surface above the gauge datum (zero point). Gauge height is often used
interchangeably with the more general term, stage, although gauge height is
more appropriate when used with a gauge reading. Gauge heights are measured
in metres (m).
- gauging station
- A site on a stream, lake,
reservoir or other body of water where observations and hydrologic data are
obtained. Measurements of stream discharge at gauging stations.
- Geocentric Datum of
Australia - a new coordinate framework for Australia which is compatible with
the Global Positioning System (GPS). The GDA was adopted in 1994 and will be
implemented from the year 2000. Geoscience Australia
- gigalitre (GL)
- 1 000 000 000 litres or 1
million cubic metres or 1 million kilolitres (kL).
- Global Positioning System.
A highly accurate system for determining the precise location of a point on
the earth's surface (and therefore its co-ordinates) by calculation from the
signals of at least three satellites in a world-wide grid. Geoscience Australia
- Water that is held in the
rocks and soil beneath the Earth's surface.
- groundwater work
- A bore, well or excavation
which is used to abstract water from the ground
- GS Map
- Geodetic Survey Map number
- GW Zone
- Groundwater management
areas are often broken up into management zones to assist with groundwater
management and allocation.
- Groundwater Management Area
(an area corresponding to an aquifer extents which is used for management
- H (hole)
- Refers to the hole number
in the groundwater summary report when a groudwater work includes more than
- A graphical representation of changes in stage or discharge with respect to
- Inside diameter in millimetres (mm) of the casing used to contructed the bore.
- A body of fresh or salt
water entirely surrounded by land.
- The angular distance north
or south of the equator, measured in degrees, minutes and seconds.
- The angular distance east
or west of the prime meridian, measured in degrees, minutes and seconds.
- A parcel of land defined by measurement as a lot in a deposited plan or as a
Crown portion or allotment. Dept Lands
- Murray Darling Basin Authority
- Former Murray Darling Basin Commission — functions absorbed by MDBA on 2008-12-15
- megalitre (ML)
- Unit of volume; 1 000 000
litres (about one Olympic-sized swimming pool).
- millgram per Litre, a unit of concentration (eg. 5.2 mg/L)
- Map Grid of Australia 1994
(MGA94)- a cartesian coordinate system based on the Universal Transverse
Mercator projection and the Geocentric Datum of Australia 1994. The unit of
measure is the metre. Geoscience Australia. See
- Manly Hydraulics Laboratory
- millilitre (mL)
- Unit of volume; one thousandth of a litre.
- monitoring network
- The collection of
monitoring sites where measurements are taken for a common purpose/project,
e.g., the salinity network is all those sites where electrical conductivity
measurements are taken.
- The Y-coordinate (the
horizontal lines that divide the map from north to south), and get larger to
the north. See Coordinates, Grid
- Outside diameter in
millimetres (mm) of the casing used to contructed the bore.
- Information on who
commissioned the work to be drilled (eg. Private, Local Gov't etc).
- Refers to the pipe number
in the groundwater summary report when a groudwater work includes more than
- One of
7515 areas formed by the division of 141 counties. Counties and
parishes are administrative divisions of the state and are not separately
disposable land parcels. Parishes are divided into separately disposable
parcels called "portions", these being the common basic units of
land disposed of by the Crown. Other basic units are allotments in Government
Towns and Villages. Dept Lands
- peak flow
- The maximum instantaneous
discharge of a stream or river at a given location. It usually occurs at or
near the time of maximum stage.
- The ability of a material
to allow the passage of a liquid such as water through rocks. Permeable
materials such as gravel and sand allow water to move quickly through them,
whereas impermeable material, such as clay, is resistant to the passage of
some or all fluids.
- The process of contacting
an external recording device and obtaining the current reading.
referring to a parcel of land means the basic land unit capable of separate
disposition created by the Crown within the boundaries of a parish. A typical
description of such a land unit would be Portion 6, Parish of Sutherland,
County of Cumberland. A portion may be further subdivided after alienation
from the Crown, in which case that portion ceases to be a separately
disposable parcel. Dept Lands
- All forms in which water
(H2O) falls to the ground as rain, sleet, snow, hail, drizzle or other
specialised forms, and also the amounts measured.
- Predetermined methods and
techniques used to obtain consistent and accurate samples and measurements.
- provisional data
- Data that has yet to be quality checked.
- Quantity of rain falling
within a given area in a given time, usually the previous 24 hours. Usually
expressed in millimetres (mm).
- rating curve
- A drawn curve showing the
relation between gauge height and discharge of a stream at a given gauging
station. USGS glossary
- rating table
- (1) In most contexts, a
table showing the relation between the gauge height and the discharge of a
stream at a given gauging station. Also referred to as discharge table.
(2) Any table showing the relation between two mutually dependent
quantities or variables over a given range of magnitude, e.g., a table
showing the relationship between the stage in a reservoir and its volume. Nevada Division of Water Resources
- A mechanical or electronic apparatus that captures measurements.
- Refers to the departmental administrative regions
- A pond, lake or basin,
either natural or artificial, for the storage, regulation and control of
water. USGS glossary
- A copious stream of water flowing in a channel towards a sea.
- The amount of salt present
in solution. Can be a descriptive term (e.g. good) or can be expressed as a
value in mg/L or ppm. See also electrical conductivity and mg/L
- In this context sampling
refers to the collection of water quality samples for analysis and testing.
- The component of an
instrument that responds, detects or measures a physical or chemical property
and records, indicates or otherwise responds to it.
- staff gauge
- A fixed vertical graduated
scale on which the level of a liquid surface relative to a datum may be read.
- The level of water in a
channel. Stage recorders monitor the depth of water at a gauging station.
Because there is a relationship between discharge and stage at any point,
stage can be used to calculate discharge. (xrefer.com)
- standing water level
- The level to which the
water rises in a groundwater work (e.g. bore).
- See reservoir.
- storage curve
- A curve depicting the
volume of stored water against stage or time.
- A general term for a body
of flowing water; a natural watercourse containing water at least part of the
year. In hydrology, it is generally applied to the water flowing in a natural
channel rather than a canal. Nevada Division of Water
- stream flow
- The water discharge that
occurs in a natural channel. A more general term than runoff, stream flow may
be applied to discharge whether or not it is affected by diversion or
- stream gauging
- All of the operations necessary for measuring discharge.
- surface water
- Water flowing or held in streams, rivers and other wetlands in the landscape.
- See standing water level.
- Process of recording the readings of an instrument and transmitting them by radio.
The Pocket Oxford Dictionary of Current English
- A river or stream flowing
into a larger river or lake. Usually, a number of smaller tributaries merge
to form a river. USGS glossary
- Upstream of a reference point.
- Refers to alluvial (i.e. river) sediments which have not undergone any consolidation.
- United States Geological Survey.
- Water bearing zone type,
refers to the type of aquifer in which a groundwater work is constructed (e.g.
unconsolidated, consolidated or fractured)
- An overflow structure that
may be used for controlling upstream surface level or measuring discharge or
- work status
- Information about whether a
groundwater work is still in use or has been abandoned
- work type
- See groundwater work.
- The amount of water that is
abstractable from a bore, (usually expressed in Litres per second (L/sec))
- In the Universal Transverse Mercator map projection, the world is divided
into 60 zones. Map zones in Australia refer to the map grid (e.g. MGA94 or AMG66).