Aquatic EcoDynamics Modelling Library
FABM is a software framework for simulating biogeochemical models. It allows multiple bio-geochemical models to be configured and interact with each other, and for those models to connect with a diverse array of hydrodynamic drivers (e.g. GLM).
GLM is a light-weight and easy to use lake hydrodynamic model designed to drive the AED modules.
TUFLOW-FV is a 3D flexible-mesh (finite volume) hydrodynamic model (developed by BMTWBM) that can be used for modelling a diverse array of inland and coastal water bodies and it is able to call the AED library directly via a custom interface. The model accounts for variations in water level, the horizontal salinity distribution and vertical density stratification in response to inflows, salt-wedge dynamics and surface thermodynamics. The finite volume numerical scheme solves the conservative integral form of the non linear shallow water equations in addition to the advection and transport of scalar constituents such as salinity and temperature and the state variables from the coupled biogeochemical model. The equations are solved in 3D with baroclinic coupling with both salinity and temperature using the UNESCO equation of state. Both 1st and 2nd order spatial integration schemes are available, and the temporal integration scheme is explicit and uses both mode-splitting and dynamically varying timesteps to maximize computational efficiency subject to Courant and Peclet stability constraints. Surface momentum exchange and heat dynamics are solved internally within the model from available meteorological boundary condition data. In the current application, turbulent mixing of momentum and scalars has been calculated using the Smagorinsky scheme in a horizontal plane and through various options for vertical mixing.