SUDS Control Data Fields (InfoWorks)
New SUDS control data in InfoWorks networks is added to database in either the SUDS Control
tab of the Subcatchments Grid or by clicking on the 
button adjacent to the SUDS controls field in the SUDS/LIDs section of the subcatchment Property Sheet.
The data can, however, only be modified or deleted from the SUDS controltab in the Subcatchments Grid.
Once defined, a SUDS control object can be associated a SUDS controls structure in a subcatchment.
The following table describes the all data fields which are used to define a SUDS control object.
Common Data Fields Fields that are common to the majority of objects can be found in the Common Fields topic.
SUDS Control Data
Database Table Name: hw_suds_control
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Field Name |
Help Text |
Database Field |
Size |
Precision |
Default |
Error Lower Limit |
Error Upper Limit |
Warning Lower Limit |
Warning Upper Limit |
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| Control ID | The name that identifies this control object. |
control_id |
Text |
64 |
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| Control type | The type of SUDS/LID control can be selected from the dropdown list. | control_type | Text | 25 | Bio-retention cell |
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| Berm height |
Storage height. When confining walls or berms are present this is the maximum depth to which water can pond above the surface of the SUDS/LID structure before overflow occurs. For SUDS/LIDs that experience overland flow, it is the height of any surface depression storage. For swales, it is the height of the trapezoidal cross section, which must be greater than 0.001 mm. |
surf_berm_height | Double | PS | 3 | 0 |
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| Storage depth | Storage depth. | surf_storage_depth | Double | PS | 3 | 0 |
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| Vegetation volume fraction | Fraction of the area above the surface that is filled with vegetation. | surf_veg_vol_fraction | Double | 3 | 0 |
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| Surface roughness (Manning’s n) | Manning’s n for overland flow. This surface roughness cannot be 0 for permeable pavements, green roofs or vegetative swales. | surf_roughness_n | Double | 3 | 0.1 |
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| Surface slope | The gradient of the surface slope. | surf_slope | Double | S | 3 | 0.01 |
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| Swale side slope (run/rise) | The run/rise (inverse slope) of side walls. | surf_xslope | Double | 3 | 0.05 |
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| Pavement thickness | The thickness of the pavement layer. | pave_thickness | Double | PS | 3 | 100 |
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| Pavement void ratio | The void ratio of the pavement layer. | pave_void_ratio | Double | 3 | 0.15 |
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| Impervious surface fraction | Ratio of impervious paver material to total area. | pave_impervious_surf_fraction | Double | 3 | 0 |
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| Permeability | Permeability of the concrete or asphalt used in continuous systems or hydraulic conductivity of the fill material (gravel or sand) used in modular systems. | pave_permeability | Double | I | 3 | 100 |
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| Pavement clogging factor | Number of pavement layer void volumes of runoff treated it takes to completely clog the pavement. | pave_clogging_factor | Double | 3 | 0 |
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| Regeneration interval |
The number of days that the pavement layer is allowed to clog before its permeability is restored, usually by vacuuming its surface. |
pave_regen_interval | Double | TD | 3 | 0 | 0 | ||||
| Regeneration fraction |
The fractional degree to which the pavement's permeability is restored when a Regeneration interval is reached. A value of 0 (default) indicates no regeneration, while a value of 1 indicates complete restoration to the original permeability. Once a regeneration occurs, the pavement begins to clog once again at the rate set in the Pavement clogging factor. |
pave_regen_fraction | Double | 3 | 0 | 0 | |||||
| Soil class | The class of soil can be selected from a drop-down list. | soil_class | Text | 20 |
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| Soil thickness | Thickness of layer. | soil_thickness | Double | PS | 3 | 500 |
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| Soil porosity | Porosity of the soil. This field is automatically populated when the Soil class is selected. | soil_porosity | Double | 3 | 0.5 |
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| Field capacity | Soil field capacity. This field is automatically populated when the Soil class is selected. | soil_field_capacity | Double | 3 | 0.2 |
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| Wilting point | Soil wilting point. This field is automatically populated when the Soil class is selected. | soil_wilting_point | Double | 3 | 0.1 |
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| Conductivity | Soil’s saturated hydraulic conductivity. This field is automatically populated when the Soil class is selected. | soil_conductivity | Double | I | 3 | 12.7 |
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| Conductivity slope | Slope of the curve of log (conductivity) versus soil moisture content. | soil_conductivity_slope | Double | 3 | 10 |
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| Suction head | Soil capillary suction. This field is automatically populated when the soil Class is selected. | soil_suction_head | Double | PS | 3 | 88.9 |
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Barrel height |
Height of a rain barrel. | storage_barrel_height | Double | PS | 3 | 0 |
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| Storage thickness | Thickness of the storage layer. | storage_thickness | Double | PS | 3 | 150 |
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| Storage void ratio | The storage void ratio. | storage_void_ratio | Double | 3 | 0.75 |
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| Seepage rate | The filtration rate of the layer when first constructed. | storage_seepage_rate | Double | I | 3 | 10 |
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| Storage clogging factor | Number of storage layer void volumes of runoff treated it takes to completely clog the layer. | storage_clogging_factor | Double | 3 | 0 |
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| Coefficient for flow in mm/hr |
Coefficient C that determines the rate of flow through the underdrain as a function of height of stored water above the drain bottom. If the layer has no drain then set Coefficient for flow in mm/hr to 0. 
Warning
The discharge coefficient in ICM can only be specified in metric (native) units, regardless of what type of unit has been set as the default display unit. |
underdrain_flow_coefficient | Double | 3 |
0 |
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| Flow exponent | Exponent n that determines the rate of flow through the underdrain as a function of height of stored water above the drain outlet. | underdrain_flow_exponent | Double | 3 |
0.5 |
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| Offset height | Height of underdrain piping or outlet above the bottom of the storage layer or rain barrel. | underdrain_offset_height | Double | PS | 3 |
150 |
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| Delay | The number of dry weather hours that must elapse before the drain line in a rain barrel is opened. | underdrain_delay | Double | Hours | 3 | 6 |
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| Flow capacity |
The flow capacity of the roof drain for a rooftop disconnection. This is the maximum flow rate that the roof's drainage system, including gutters and downpipes, can handle before overflowing occurs. Use 0 if not applicable. |
underdrain_flow_capacity | Double | 4 | 6 |
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| Mat thickness | The thickness of the drainage mat layer. | drainagemat_thickness | Double | PS | 3 |
75 |
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| Mat void fraction | The void fraction of the drainage mat. | drainagemat_void_fraction | Double | 3 |
0.5 |
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| Mat roughness (Manning’s n) | Roughness of the drainage mat. | drainagemat_roughness | Double | 3 |
0.1 |
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