Simulations are the use of real-time data, from which a mathematical model is developed into a computer program to represent the functional relationships and the dynamic responses or behaviour in a real or proposed system. Simulations allow the study of systems that cannot be studied safely or easily in real life and provide a high level of analytical capabilities. The Centre for Water Research have utilized these capabilities to study aquatic systems across the world, such as Lake Iseo in Italy and Rio De La Plata in Argentina. Adjustment of variables allows simulation of varying conditions within each of the sites and determines how a change in one or more variable affects the rest of the system. Simulations are a useful part of modelling natural systems as it has helped CWR to gain insight into the operation of our aquatic eco-systems.

Data output from two different models is used in RMSO to produce the simulations of each of the aquatic sites, Estuary Lake and Coastal Ocean Model (ELCOM) and Computational Aquatic Ecosystem Dynamics Model (CAEDYM). ELCOM is a 3D hydrodynamic model used for predicting the velocity, temperature and salinity distribution in natural water bodies subjected to external, environmental forces such as wind stress, or surface heating and cooling. ELCOM is designed to facilitate the study of aquatic systems over time scales extending to a few weeks and is used with CAEDYM for simulation of biological and chemical processes.

CAEDYM consists of a series of mathematical equations representing the major biochemical processes influencing water quality and provides process descriptions for primary production (?) secondary production (?), nutrient and metal cycling, oxygen dynamics and the movement of sediment. The output of the data typically shows a cross section of a water body such as a river or lake.

Simulations