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The output consists of a timeseries of the nett in- and outflow, where the flow rate through the faces faces is computed as the flow velocity times the length and width of the grid cell. The result is a flow rate in m3/s (assuming the flow velocity is given in m/s and the grid size in m). Effects of porosity are not taken into account.
description
An optional description
exportTypeStandard
This type specifies which reader should be used to read the file. The type must be one from the enumeration. Presently (2007/02) only bfg and pi are included in this list.
exportType
This type specifies which reader should be used to read the file. It may be any string as long as this type is supported by the TimeSeriesExport module. The list of supported types is given below.
folder
Folder (directory) in which to store the exported files.
exportFileName
This elements describes how to construct the filename(s) of the exported file(s).
If only the name element is given a fixed name is used for each export. The prefix and suffix elements describe how to create a filename prefix and/or suffix. The temporaryPrefix is used to generate a prefix for the temporary file as it is being written. After that the fine is renamed.
validate
Optional element. Only applicable if the data are exported to the xml-file. This option activates the validation of the exported file against a XML schema.
idmapId
Id of IdMap to be used for parameterId and locationId mapping
unitConversionsId
Id of UnitConversions to be used for unit mapping
flagConversionsId
Id of flagConversions to be used for flag mapping
exportMissingValue/exportMissingValueString
Missing value definition for this time series. Either a string or a number. Defaults to NaN if not defined.
omitMissingValues
If set to true records with missing values are not exported
exportTimeZone
TimeZone in which to export the data. Can either be a string (timeZoneName) or an offset (timeZoneOffset).
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Storage change
The input for determining the storage change consists of either:
- The storage change rate per grid cell (that is, the change in the water table per time step)
or - The water table or water level per grid cell
The timeseries must be defined on the same rectangular grid, and in the latter case there must be at least two times.
The output consists of a timeseries of the nett change in storage, where the stored volume per grid cell is computed as the water table times the length and width of the grid cell. The result is the change in the volume of water present within the area delimited by the polygon. Effects of porosity are not taken into account.
Remarks
While the above description refers to volume or mass balances, the module is more generally applicable to any parameter that represents a mass balance, for instance, if instead of flow velocities, you specify the flux of nutrients (concentration times flow velocity), you can compute the nett inflow/outflow of nutrients through the given polygon.
Porosity is not taken into account in the module, but you can correct for that via the transformation module.