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Water Quality Layers |
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Conditions |
if the Include Advection Dispersion (AD) Water Quality option selected in the Simulation Specification dialogue AND the SZ solute transport option is turned on AND at least one sorption or decay process is active |
The water quality layers present a conceptual layer system like the geologic layers that applies to chemistry parameters. In some cases, the water quality layers will mimic the geologic layers, but in other case they will not. For example, redox potential will not generally follow the geologic layers and water quality parameters related reaction processes will be quite different in oxidizing and reducing envrironments. Likewise, you may have several geologic layers in the upper quaternary deposits that affect the flow hydraulics, but the water chemistry can be divided into a quaternary sand and silt zone overlain on an iron rich shale layer.
Unfortunately, the different water quality parameters may not all require identical water quality layers. However, in the current version, only one set of water quality layers is available. If two or more parameters require different distributions, then you will have to divide the overlapping layers into seperate units.
When you add a Water Quality Layer to the table, an item is added to the data tree containing all of the relevant data for the Water Quality Decay Processes (V1 p. 350) and Water Quality Sorption processes (V1 p. 351) that are active. The location of the WQ Layer is specified by a Lower Level (V1 p. 349).
Related Items:
· Solute Transport in the Saturated Zone (V1 p. 663)
· Water Quality Decay Processes (V1 p. 350)
· Water Quality Sorption processes (V1 p. 351)
