Sediment Diagenesis/Specified Fluxes
If the full sediment diagenesis sub-model is being used then the user has the ability to view the concentrations and/or resulting nutrient fluxes using Viewing Opt | Diagenesis. If the user is applying a constant or time variable specified nutrient flux then the user can view the nutrient flux zones and flux rates using Viewing Opt | Sediment Flux.
Sediment Diagenesis
When the full diagenesis option has been selected the Viewing Opt | Diagenesis is available to view/edit the initial concentrations and, after a model run, post-process the concentrations and nutrient fluxes. An example of the Options frame is shown in the adjacent graphic. Below the dropdown list for the diagenesis parameter is a sub-option area that changes with the parameter selected.
The Show Zone checkbox overrides the current parameter and shows the diagenesis zones instead. For pre-processing, the zones can be edited using the cell property copy function and the diagenesis parameters can be edited by RMC'ing on a cell (if Enable Edit is checked).
The diagenesis parameters that are available for viewing are provided in Table 1. The sub-options that are available for each parameter are also listed.
Table 1 List of sediment diagenesis parameters and sub-options available.
Abbrev | Name | Sub-Options |
Conc PON | Concentration of PON | Total or by G Class |
Conc POP | Concentration of PON | Total or by G Class |
Conc POC | Concentration of PON | Total or by G Class |
Conc NH4-N | Concentration of Ammonium | Total or by Layer |
Conc NO3-N | Concentration of Nitrate | Total or by Layer |
Conc PO4-P | Concentration of Phosphate | Total or by Layer |
Conc H2S | Concentration of Hydrogen Sulfide | Total or by Layer |
Conc Silica | Concentration of Silica | Particulate Biogenic or by Layer |
Benthic Stress | Benthic Stress |
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Sed Temp | Sediment Temperature (not linked to heat sub-model) |
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PON Flux | PON Flux between Sediment-Water | Total or by G Class |
POP Flux | POP Flux between Sediment-Water | Total or by G Class |
POC Flux | POC Flux between Sediment-Water | Total or by G Class |
SOD | Sediment Oxygen Demand | Total or Only Carbonaceous or Only Nitrogenous |
COD | Chemical Oxygen Demand Flux |
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NH4 Flux | Ammonium Flux between Sediment-Water |
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NO3 Flux | Nitrate Flux between Sediment-Water |
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PO4 Flux | Phosphate Flux between Sediment-Water |
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Silica Flux | Silica Flux between Sediment-Water |
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Sediment Flux
There are two specified flux options, one for invariant fluxes horizontally and temporally, and another that varies by zones in conjunction with mud/sand distributions (not linked to the sediment transport sub-model).
The parameters that are available for display are:
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If the temporally varying option was selected the Time (days): field is displayed to view the nutrient fluxes assigned for that day. These are input flux rates, not computed flux rates by EFDC.