Digital Signal Processing Reference
In-Depth Information
The Processes Involved in the Water Quality Model
In Delft3D-WAQ module the constituents of a water system are divided into functional groups.
Figure
(7-18)
shows these groups and the links between them. A functional group includes one or more
substances that display similar physical and/or (bio)chemical behavior in a water system. For example,
the nutrients: nitrate, ammonium, phosphate and silicon, are a functional group as they are required for
primary production. Functional groups can interact with each other directly or indirectly. The
highlighted substance groups in
Figure (7-18)
i
ndicate the groups including the selected variables for
the developed water quality model. It is important to mention that the substances and water quality
processes to be modeled are created or selected with the PLCT (Processes Library Configuration
Tool). The PLCT is a component of the Delft3D-WAQ module. This library allows us to select the
following inputs to the model: State variables (called substances in Delft3D-WAQ), water quality
processes, editable process parameters and output variables.
Figure (7-18): General overview of substances included in Delft3D-WAQ.
(After Delft3D-WAQ manual, 2005)
The basic steps in water quality modelling applying the Delft3D -WAQ module could be sumarised
in the following:
1.
Selection of the result from the hydrodynamic simulation and make it suitable for application
in the water quality simulation (coupling Process).
2.
Definition of the substances and water quality processes to be included in the model.
3.
Definition the water quality simulation properties using the outcome of the first and second
step.
4.
Definition of initial conditions, boundary conditions, waste loads, simulation time, output
variables and identification of monitoring points
5.
Run the simulation and check the output.
6.
Calibrate and verify the model.
Figure (7-19)
shows the data flow diagram for the Delft3D-WAQ module
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