Sediment Diagenesis/Specified Fluxes

Owned by Kester Scandrett
Last updated: 08 Jul, 2016 by Duy Pham

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

 

Sed Temp

Sediment Temperature (not linked to heat sub-model) 

 

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

 

NH4 Flux

Ammonium Flux between Sediment-Water 

 

NO3 Flux

Nitrate Flux between Sediment-Water

 

PO4 Flux

Phosphate Flux between Sediment-Water

 

Silica Flux

Silica Flux between Sediment-Water

 

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:

  • Mud Zone
  • Sand Zone
  • Percent Mud
  • Sediment Oxygen Demand (SOD)
  • Chemical Oxygen Demand (COD)
  • Dissolved Available Silica (SAD)
  • Nitrate (NO3)
  • Ammonium (NH4)
  • Phosphate (PO4)

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.