Numerical/mathematical/computer models use one or more mathematical
equations to simulate the behaviour of real systems under
a wide range of conditions.
Why use a model?
Models have a wide range of applications and benefits,
some of which are outlined below.
- Numerical models can be used to make predictions
about the outcomes of a particular mangement scenario,
for example, determining potential impacts of different
types of landuse on a range of environmental aspects,
such as water quality, for a set period of time;
- They can also be used in hindsight,
to assess the effectiveness of management actions and
to evaluate the influence of natural factors on the environment,
such as climate change;
- Numerical models can be used to assist
setting water quality objectives as well as assessing
their effectiveness. The publication Targets, Data and Models: Catchword. Issue 127. May 2004 has
more information about using models for setting and assessing
water quality objectives (Note: WQOs are referred to as
'targets' in this document);
- Modelling helps users to develop an understanding
of physical and biological processes in their waterways; and
- Models can assist users in developing management plans for their waterway.
Choosing a model
Click on an water quality issue to find existing modelling
tools available for that water quality issue.