Water Quality Module (WQ)
 A water quality module has been developed by DHI Water &
Environment. It is coupled to the advection-dispersion (AD) module and simulates the reaction processes of multi-compound systems including the degradation of organic matter, the photosynthesis and
respiration of plants, nitrification and the exchange of oxygen with the atmosphere.
The mass balance for the parameters involved are calculated for all grid points at all time steps using a rational extrapolation method in
an integrated two-step procedure with the AD module.
A number of modules have been developed describing:
- BOD-DO relationships
- Nitrification
- The influence of bed vegetation on water quality
- Sedimentation and re-suspension
- Oxygen consumption from reduced chemicals
Two add-on modules are available for the WQ module:
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