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How to Define your Dry Weather Inflow in InfoSWMM and InfoSWMM SA

How to Define your Dry Weather Inflow in InfoSWMM and InfoSWMM SA

The Dry Weather page of the Inflows Editor dialog is used to specify a continuous source of dry weather flow entering a node of the drainage system.

To initiate the Dry Weather Inflow editor, do one of the following:

1. To edit dry weather inflow for one node at a time:

§ Select node, click on the icon located at the second row of the top of the attribute browser, select Inflow from the initiated pop up menu, and then click on Dry Weather button. This will initiate the following Dry Weather Inflow editor.

§ Use to add more rows to the table or to delete the highlighted rows.

Notes:

  • Once dry weather inflow properties are specified, the user needs to click on the button to save the properties or on the or buttons to cancel the changes and close the editor.
  • A pattern multiplier can be specified for each of the following:
    • Month of the year
    • Day of the week
    • Hour of the day

Weekend (a weekend pattern is only applied to Saturday and Sunday, otherwise the multiplier value is 1.0 for weekdays) If multiplier patterns are specified then the flow into the node at any given timestep is (Average DWF * Monthly Multiplier * Daily Multiplier * Hourly Multiplier * Weekend Multiplier)

2. To edit dry weather inflow for multiple nodes at a time:

· Select one of the group editing features (i.e., Group Editing on Selection () or Group Editing on Domain ()).

· On the initiated Group Editing dialog, click on button, and then click on Dry Weather button. These steps would activate the Dry Weather Inflow Editor shown below.

Note:

  • Once the dry weather inflow properties are specified, the user needs to click on the button to save the properties or on the or the buttons to cancel the changes. Select the button to close the editor.
  • The button deletes dry weather inflow data for the selected elements only. The button empties dry weather inflow data for all nodes, not just the selected nodes, in the drainage system.
  • The Group Editor for DWF in InfoSWMM only modifies the "default" allocation code load when applying in the group editor.
  • The Group Editor for DWF in InfoSWMM deletes all allocation code loads when emptying all in the group editor.

The Dry Weather Inflow dialog consists of the following input fields:

Name Description
Constituent Selects the constituent (FLOW or one of the project’s specified pollutants) whose dry weather inflow will be specified.
Allocation Code An ID used to distinguish the types of dry weather flows (e.g. Residential, Industrial, etc.)
Average Value Specifies the average (or baseline) value of the dry weather inflow of the constituent in the relevant units (flow units for flow, concentration units for pollutants). Leave blank if there is no dry weather flow for the selected constituent.
Time Patterns Specifies the names of the time patterns to be used to allow the dry weather flow to vary in a periodic fashion by month of the year, by day of the week, and by time of day (for both week days and week ends). One can either type in a name or select a previously defined pattern from the dropdown list of each combo box. Up to four different types of patterns can be assigned. You can click the button next to each Time Pattern field to edit the respective pattern.

Note: More than one constituent can be edited while the dialog is active by simply selecting another choice for the Constituent property.

DWF Allocator (available with Suite license level):

An indispensable master planning tool, InfoSWMM DWF Allocator gives you seven highly advanced and efficient geospatial methods for processing geometric polygons to accurately compute and load network models based on load type, location, and variation:

· Geocoded meter billing data (meter consumption database)

· Polygon Intersection – spatial intersection of multiple polygon layers

· Polygon Extraction – spatial summation of load category area polygon

· Closest (Nearest) Junction Method

· Closest (Nearest) Conduit Method

· Meter – Junction Allocation

· Meter – Conduit Allocation

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