The output of the MIKE SHE AD is stored to several dfs0, dfs2 and dfs3 files which can be viewed and processed with the different tools available for these files in MIKE ZERO.
For each species, a concentration file is created for each hydrologic process - a dfs2 file for OL, and a dfs3 file each for UZ and SZ.
For each species, the total WQ mass balance is stored in two dfs0 files. The xx_species_AllItems.dfs0 includes all of the possible water quality mass balance items. The xx_species.dfs0 is a copy of the _AllItems.dfs0 file with all of the non-zero items removed.
The first 20 items in the _AllItems.dfs0 file define the global mass balance (see Table 35.2). There are four items: Storage, Input, Output and Error. Each of these is calculated for each of the five storage items: SZ, Immob(SZ), UZ, MP(UZ), and OL.
The item MP(UZ) is for solutes stored in the UZ macropores when the macropore option in UZ is turned on. In this case, water and solutes move in both the matrix and the macropores, but the volume of water in the macropores is generally much less than the volume of water in the matrix. So, the primary porosity is the UZ matrix.
However, the mass in the SZ and UZ items includes the mass in both the primary and secondary porosities.
The Output, Input and Storage are all displayed as positive values in the dfs0 file and the WQ log file. A positive change in storage denotes an increase in mass.
The rest of the items in the _AllItems.dfs0 file are only non-zero if the item is relevant for the current WQ simulation. Table 35.2 lists all of the rest of the items in the _AllItems.dfs0 organized by the source of the solute.
Table 35.2 Available WQ mass balance items in the _AllItems.dfs0 file
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From
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To
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Comment
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Sources
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SZ, UZ, OL, River
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Note that sources can be specified as positive or negative.
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Ext. Sources (OpenMI)
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SZ, UZ, OL
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This is non-zero only if a model is linked to MIKE SHE by OpenMI that adds mass to the component.
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Ext. Input (OpenMI)
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SZ Drain
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This is non-zero only if a model is linked to MIKE SHE by OpenMI that adds mass to the component.
However, this is a special case because you can add mass directly to the SZ drain without it actually becoming part of the SZ model. The mass is then added to the model at the location were the drain discharges (i.e. river link, SZ boundary, or local SZ depression)
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Boundary
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SZ, UZ, OL, River
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The (Boundary to River) item is typically zero, but can be non-zero in a couple of rare cases:
If you have
1) a fixed head SZ boundary, or
2) a fixed concentration boundary,
next to a river link, then mass from this cell to the river will be added to (Boundary to River).
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Precip
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UZ, OL
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Mass from precipitation is always added to either OL or UZ, even though precipitation can be added to SZ in the WM module.
If you have a SZ-only simulation, then mass from precipitation is included in the (Precip to OL) and then (OL to SZ)
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Decay
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SZ, Immob(SZ), UZ, MP(UZ), OL
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This is the mass that has decayed in each of the processes
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Sorp/DeSorp
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SZ, Immob(SZ), UZ, MP(UZ), OL
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This is the net Sorption and Desorption to the soil matrix in each of the processes. If mass is sorbed to the soil matrix it is removed from solution and this value will be negative. If mass desorbs from the soil matrix it is added to solution and this value will be positive.
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Colloid-Sorp/DeSorp
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SZ, Immob(SZ), UZ, MP(UZ), OL
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This is the net Sorption and Desorption to colloids in each of the processes. If mass is sorbed to the colloids it is removed from solution and this value will be negative. If mass desorbs from the colloids it is added to solution and this value will be positive.
However, this is normally zero, because colloid transport is not available in the commercial version of MIKE SHE, only a research version.
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EcoLab
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SZ, Immob(SZ), UZ, MP(UZ), OL
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This is the mass change resulting from passing solutes to and from MIKE ECO Lab - positive if MIKE ECO Lab causes the mass to increase and negative if mass decreases.
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SZ
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UZ, MP(UZ), OL, Sinks, Sources, Ext.Sinks(OpenMI), Decay, Sorp/DeSorp, Colloid-Sorp/DeSorp, EcoLab, Plant Uptake
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Note that there is no mass transfer to SZ drains because the SZ drains have not storage. Mass that discharges to SZ drains passes straight through the drain and is added to the end recipient (i.e. a river, boundary, or local depression.
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Immob(SZ)
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UZ, Decay, Sorp/DeSorp, Colloid-Sorp/DeSorp, EcoLab
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SZ Baseflow
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River
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This is a special item that includes only the mass from SZ to rivers.
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SZ Drain
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River, SZ (Local Dep), Boundary
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This is a special item that divides up the SZ mass discharge to drains by the end recipient.
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SZ Flow
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Boundary
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This is a special item to distinguish between SZ mass discharge to boundaries via drains and direct discharge to the boundary.
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SZ(Fract)
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Immob(SZ)
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This is a special item that includes only the mass exchange between fractures and the matrix when the dual porosity option is selected in the SZ.
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UZ
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SZ, Immob(SZ), OL, Sinks, Sources, Ext.Sinks(OpenMI), Boundary, Decay, Sorp/DeSorp, Colloid-Sorp/DeSorp, EcoLab, Plant Uptake
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Note that the (UZ to Boundary) item refers to mass discharge from UZ to SZ boundaries. This can arise, for example, when a UZ column discharges into an SZ cell that contains an internal boundary condition, such as a constant head.
Note that the (UZ to Immob(SZ)) item will only be non-zero when the dual porosity option in SZ is turned on. In this case, as the water table increases, there will be a transfer of UZ mass to water in both the SZ fractures and SZ immobile matrix based on the ratios of their porosities.
Related to the above, if macropores are active, then mass in the UZ macropores will be distributed to both the SZ matrix and the SZ fractures.
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MP(UZ)
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SZ, Immob(SZ), UZ(Matr), Decay, Sorp/DeSorp, Colloid-Sorp/DeSorp, EcoLab
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UZ(Matr)
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MP(UZ)
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This is a special item that includes only the mass exchange between macropores and the matrix when the macropore option is selected in the UZ.
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OL
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SZ, UZ, MP(UZ), River, Sinks, Sources, Ext.Sinks(OpenMI), Boundary, Decay, Sorp/DeSorp, Colloid-Sorp/DeSorp, EcoLab
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River
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SZ, OL, Boundary
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(River to OL) is always zero because this exchange has not yet been implemented.
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