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The Percent Removal filter removes a fixed percentage of the constituent associated with the quick flow of the functional unit (FU) and a fixed percentage of the constituent associated with the baseflow.
Scale
This model is a catchment scale model.
Principal developer
Cooperative Research Centre for Catchment Hydrology
Version
Source v2.10
Dependencies
Requires a constituent generation model to be assigned to the corresponding functional unit(s).
Availability/conditions
The Percent Removal filter is automatically installed with Source.
Flow
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phase
Each time-step, the model removes a fraction of the constituent load that was generated from the functional unit.
The constituent generation models generate both a ‘quick load’, associated with the quick flow component of runoff, and a ‘slow load’, associated with the slow flow, or baseflow, runoff component.
The quick load is reduced by the Percent Removal filter using the PercentRemovalQ parameter.
Equation 1 |
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The same process is applied to the constituent load associated with the baseflow (the ‘Slow Load’ here), using a separate, PercentRemovalS parameter.
| Equation 2 |
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The result of the filter is the total load for the functional unit, which is the sum of the filtered quick load and the filtered slow load.
| Equation 3 |
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Input data
This model operates on the incoming constituent load, which is automatically provided to the model by Source.
Parameters or settings
Refer to Table 1.
Table 1. Parameters or settings
Parameter | Description | Units | Default | Range |
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Percent Removal S | A single, constant value (%) of load removed from the slow flow | % | 0 | 0-100 |
Percent Removal Q | A single, constant value (%) of load removed from the quick flow | % | 0 | 0-100 |
Output data
The resulting filtered constituent load. These model results can be retrieved by recording the quick flow, slow flow or total flow outputs of the functional unit.