The water quality module add-on to ISIS Professional is a fully featured water quality simulator, and includes advection / diffusion of conservative and decaying pollutants, water temperature, cohesive sediment transport, interaction of quality determinands with sediments, phytoplankton and pH.
The water quality engine can be used in conjunction with a full hydrodynamic simulation to simulate water quality processes in detail, or can be driven by ISIS hydrological routing results for less detailed applications. The user is able to specify the processes included in the simulation, providing focus on the specific needs of the particular study and improved productivity. This module provides water quality simulation suitable for use in many types of studies, including Water Framework Directive and Urban Pollution Management type studies.
The water quality module is run as a post process to a ISIS Professional hydraulic simulation (in essence the velocities and flow areas calculated by the hydraulics are saved and can be used to then run one or more water quality scenarios).
The water quality module solves the one-dimensional advection-diffusion equation and any biochemical equations required. Model boundaries are represented by concentration-time or concentration-flow relationships. Pollutants can also be introduced at or removed from any point in the model (using a SOURCE unit).
ISIS Water Quality can model
- Advection / diffusion
- Conservative and decaying pollutants
- Coliforms
- Salt
- Water temperature
- pH
- Oxygen balance:
- BOD
- Organic Nitrogen
- Ammonia
- Oxidised Nitrogen
- Water / sediment oxygen interactions
- Phytoplankton
- Solar radiation
- Macrophytes
- Benthic Algae
- Absorbed phosphorous
- Silicate
- Cohesive sediments
