Hydrodynamical models, water movements, and spatial complexity
Introduction
Excepting some of the models that deal with the biology of single animals, all the models studied by ECASA have to move stuff around in space, or calculate the equilbrium result of these movements. This task has two parts.
- Get information about water currents and turbulence. This information can be obtained by measurements with current meters, and this is often the best (and most cost-effective) method on the farm-scale. The use of hydrodynamical models is often the best method for simulating water movements on the water-body scale or larger scales.
- Then, calculate the movement of dissolved substances (such as nutrients) and particulate substances (such as fish faeces) as a result of water currents, turbulence, and particle sinking.
It is easier to understand the requirements for information about currents and turbulence if we show, first, how models can use this information.
The remainder of this page is still in development
Simulating the movements of tracers
Lagrangian, particle tracking - DEPOMOD, TRIMODENA-LPT, KK3D
Box models with exchange - one box, several boxes - CSTT, DPP, EcoWin, FjordEnv, LESV
Advection-diffusion equations - not used in ECASA
Hydrodynamical models
Highly-parameterized models for boxes - built in to ECASA models: FjordEnv, LESV
Gridded models with approximations of the Newtonian equations of motion -Ifremer's HYDRO, TRIMODENA-HYDRO used with other models; EcoWin has used Delft 3D; COHERENS ....
