• InfoWorks ICM

Adding irregular weirs to a river

Add and define an irregular weir to the existing river reach network.

Tutorial resources

These downloadable resources will be used to complete this tutorial:


Step-by-step guide

River structures can be modelled as ancillary links to control flow by influencing the hydraulics of the river. In this example, an irregular weir is added to the existing river reach network from survey data stored in a cross section line. To complete this exercise, copy the network from the transportable database .icmt file for this tutorial.

  1. From the Database, double-click the 1D River Model to open it on the GeoPlan.

To help locate objects, the AutoLabel function is enabled for the Node and Cross section line ID field.

  1. In the GeoPlan Tools toolbar, click Find in GeoPlan.
  2. In the Quick Find dialog box, in the Name field, type “Weir”.
  3. Click Find.

In the InfoWorks ICM interface, the 1D River Model open on the GeoPlan, and in the Quick Find dialog box, “Weir” is entered in the Name field.

  1. Once the weir is located, Close the Quick Find window.
  2. From the GeoPlan Tools toolbar, expand the New Object Type combo box and select Link.
  3. On the GeoPlan, draw a new link from upstream node 15US to downstream node 16DS.

In the GeoPlan Tools toolbar, Link selected in the New Object Type combo box; and on the GeoPlan, a line drawn from node 15US to node 16DS and called out at the endpoint.

  1. In the Create New Link popup, set the Type to Irregular weir.
  2. Set the System Type to other.
  3. Click OK.

In the Create New Link popup, the parameters are set for this exercise, and OK is selected.

In the Properties window, notice the inline validation is red because elevation data is not entered yet.

In the Properties window, in the Chainage elevation row, the inline validation field is red.

The elevation data is contained within the weir cross section data. To fix the issue, copy and paste the data from one properties table to the other:

  1. Using the Select tool, on the GeoPlan, double-click the Weir to open its Properties window.
  2. In the Section data field, click the ellipsis () button to open the Section data window.

In the Properties window, Section data row, the ellipses (…) button is selected and called out.

  1. Press and hold CTRL while clicking the column headers for both Offset and Bed Level (m AD) to select the contents of both columns.
  2. Right-click the selection and select Copy.

In the Section data window, the Offset (m) column and Bed level (m AD) column are selected, and in the shortcut menu, Copy is selected.

  1. In the popup about copying the column headers, click No.
  2. Click OK to close the Section data window.
  3. On the GeoPlan, double-click the new Irregular weir to open the Properties window.
  4. In the Chainage elevation field, click the ellipsis () button to open the Chainage elevation table.
  5. Right-click the first blank cell.
  6. Select Paste to populate the fields.

In the Chainage elevation table, the shortcut menu for the first blank cell with Paste highlighted.

  1. Click OK.

In the Chainage elevation window, the table populated with the pasted data, and OK selected.

In the Properties window, the validation error is cleared. The Crest level is automatically set to the lowest elevation.

On the GeoPlan, the new irregular weir selected, and in the Properties panel for the weir, the validation error cleared and the Crest level set to the lowest elevation.