Conduit-Physical
Conduit-Physical Attributes
| Attribute | Description |
|---|---|
| Section Type | Lets you choose the cross-sectional shape of the currently highlighted element: Irregular Open Section , Trapezoidal , Circle , Box , Basket-Handle , Ellipse , Horseshoe Conduit , Egg , Semi-Ellipse , Catalog Pipe , Pipe-Arch , Virtual , Semi-Circle , Catenary , Gothic , Modified Basket-Handle , Rectangular-Round , Rectangular-Triangle , Power , Parabola , Triangle , Rectangular , or Irregular Closed Section . The value chosen here affects the availability of the following fields. |
| Flow (Maximum User Defined) | Maximum flow allowed in link. Use 0.0 if not applicable. |
| Station-Elevation Curve | Lets you define station-elevation points that describe the shape of the irregular channel. Click in the field to display an Ellipsis (…) button, and click the Ellipsis (…) button to use the Station-Depth Curve dialog box. To use this field, you must set the Section type to Irregular Channel . |
| Elevations Modifier | The Elevations modifier is a constant value that will be added to each elevation value. This attribute is only used during SWMM calculations. |
| Meander Modifier | The meander modifier is the ratio of the length of a meandering main channel to the length of the overbank area that surrounds it. This modifier is applied to all conduits that use this particular transect for their cross section. It assumes that the length supplied for these conduits is that of the longer main channel. The application will use the shorter overbank length in its calculations while increasing the main channel roughness to account for longer length. The modifier is ignored if it is left blank or set to 0. |
| Station Left Bank | The station value (horizontal distance) in the Station-Depth table that marks the end of the left overbank (set to zero or to the minimum station value in the Station-Depth curve to denote the absence of an overbank). To use this field, you must set the Section type to Irregular Channel. |
| Stations Modifier | The Stations modifier is a factor by which the distance between each station will be multiplied when the transect data is processed by SWMM. Use a value of 0 if no such factor is needed. This attribute is only used during SWMM calculations. |
| Station Right Bank | The station value (horizontal distance) in the Station-Depth table that marks the start of the right overbank (set to the maximum station value in the Station-Depth curve to denote the absence of an overbank). To use this field, you must set the Section type to Irregular Channel. |
| Base Width | The width at the base of the cross section of the currently highlighted element. To use this field, you must set The Section Type to Trapezoidal Channel . |
| Height | The height of the cross section of the currently highlighted element. To use this field, you must set Section Type to Trapezoidal Channel . |
| Slope (Right Side) | The right slope of the cross section of the currently highlighted element. To use this field, you must set Section Type to Trapezoidal Channel . |
| Slope (Left Side) | The left slope of the cross section of the currently highlighted element. To use this field, you must set Section Type to Trapezoidal Channel . |
| Diameter | The diameter of the cross section of the currently highlighted element. To use this field, you must set The Section Type to Circle . |
| Fill Depth | Is the amount of sedimentation that a section has. To use this field, you must set the Section Type to Circle . Only the SWMM engine uses this in calculating your model. |
| Rise | The rise (height or vertical dimension) of the currently highlighted element. To use this field, you must set Section Type to any of the types except Circle, Irregular Open Section, Irregular Closed Section, Trapezoidal, and Catalog Pipe. |
| Sidewalls Removed | Specifies if one or both side wall surfaces should be ignored when computing a hydraulic radius. |
| Span | The span (width or horizontal dimension) of the currently highlighted element. To use this field, you must set Section Type to any of the types except Circle, Irregular Channel and Trapezoidal Channel. |
| Number of Barrels | The number of barrels that comprise the currently highlighted element. Note that the diameter, rise, and/or span values are applied to each barrel. To use this field, you must set Section Type to any of the types except Irregular Open Section, Irregular Closed Section, and Trapezoidal. |
| Catalog Pipe | Lets you define or select a catalog pipe for the selected conduit. Click in the field to display an Ellipsis (…) button, and click the Ellipsis (…) button to use the Catalog Pipe dialog box. To use this field, you must set the Section type to Catalog Pipe . |
| Rect Bottom Radius | The radius of the circular portion of the Rectangular-Round section. To use this field, you must set the Section Type to Rectangular-Round . |
| Rect Triangle Triangle Height | The height of the triangular portion of the Rectangular-Triangle section. To use this field, you must set the Section Type to Rectangular-Triangle . |
| Power Exponent | The power exponent for the Power section. To use this field, you must set the Section Type to Power . |
| Depth-Width Curve | Lets you define depth-width points that describe the shape of the irregular closed section. Click in the field to display an Ellipsis (…) button, and click the Ellipsis (…) button to use the Depth-Width Curve dialog box. To use this field, you must set the Section type to Irregular Closed Section . |
| Material | The name of the material used. Alternatively, clicking the ellipsis button opens the Material Engineering Library, allowing you to select a pre-defined material. If a pre-defined material is chosen, the roughness value will change accordingly. |
| Left Bank Manning’s n | Specify the roughness coefficient in the left overbank of the irregular channel. |
| Channel Manning’s n | Specify the roughness coefficient in the main channel of the irregular channel. |
| Right Bank Manning’s n | Specify the roughness coefficient in the right overbank of the irregular channel. |
| Manning’s n | The Manning’s roughness of the currently highlighted element. This attribute is active only when the Roughness Type attribute is set to Single Manning’s n . |
| Manning’s n-Depth Curve | Lets you define points that describe a roughness-depth curve for the currently highlighted element. Click in the field to display an Ellipsis (…) button, and click the Ellipsis (…) button to use the Manning’s n-Depth Curve dialog box. To use this field, you must set Roughness Type attribute is set to Manning’s n-Depth Curve . |
| Manning’s n-Flow | Lets you define points that describe a roughness-flow curve for the currently highlighted element. Click in the field to display an Ellipsis (…) button, and click the Ellipsis (…) button to use the Manning’s n-Flow Curve dialog box. To use this field, you must set Roughness Type attribute is set to Manning’s n-Flow . |
| Roughness Type | The roughness method for the currently highlighted: Single Manning’s n , Manning’s - Depth Curve , or Manning’s n - Flow . The value chosen here affects the availability of some fields in the Physical section of the Property Editor. |
| Set Invert to Start Node? | Sets the start invert of the current element to the elevation of the start node (upstream). Set this to False to enter a value for the elevation of the invert, or set this field to True to use the start-node elevation. |
| Elevation (Start Invert) | The start, or upstream, invert of the currently highlighted element. To use this field, you must set Set Invert to Start Node? to False . |
| Set Invert to Stop Node | Sets the stop invert of the current element to the elevation of the stop node (downstream). Set this to False to enter a value for the elevation of the invert, or set this field to True to use the stop-node elevation. |
| Elevation (Stop Invert) | The stop, or downstream, invert of the currently highlighted element. To use this field, you must set Set Invert to Stop Node to False . |
| Slope | The difference between the start invert and stop invert divided by the length of the conduit. This is a calculated results field and is not editable. |
| Roughness Type | Lets you select the roughness type for the conduit. For more information see "Roughness Models"-315. |
| Overbank Channel | Lets you specify different roughness values for the left overbank flow, the channel flow, and the right overbank flow. To use this field, you must set the Section type to Irregular Channel. |
| Horizontal Segment | Lets you specify a different roughness for each horizontal segment of the channel. This information is entered in the Station-Depth curve. To use this field, you must set the Section Type to Irregular Channel. |
| Left Overbank Manning’s n | The Manning's roughness coefficient for overbank flow on the left side of the channel (between the minimum station value on the Station-Depth curve and the Left Bank Station). To use this field, you must set the Section Type to Irregular Channel and the Roughness Type to Overbank Channel. |
| Right Overbank Manning’s n | The Manning's roughness coefficient for overbank flow on the right side of the channel (between the Right Bank Station and the maximum station value on the Station-Depth curve). To use this field, you must set the Section Type to Irregular Channel and the Roughness Type to Overbank Channel. |
| Design Percent Full | The percentage full that you would like the link to maintain. If you want the pipe to be 75% full, enter in the 75 in the field. These values do not affect network calculations; they are informational only. In the Results attributes is a field called Capacity (Calculated Design). This displays the result of calculating with the equation the amount of flow going through the link if it were full to the percentage you set in Design Percent Full (in this example, the amount of flow if the link were 75% full). |