Reverse River Reach Command

The river flow direction is defined by digitizing the river reach in a downstream direction. The software will display a flow directional arrow at the center of the river reach showing the assigned flow direction.

If the river reach is defined in an incorrect direction, either right-click on the river reach and select Reverse River Reach from the context menu or go to Input | River Reaches and then select the Reverse River Reach command.

The Reverse River Reach dialog box will be displayed. This dialog box gives the user the option to renumber the cross-section river stations.

The following sections describe the Reverse River Reach command and how to interact with the above dialog box.

Selecting River Reach

The Select River Reach section is used to select river and reach segments available in the project. The River and Reach dropdown entries display the selected river and reach. The user can click the [Pick] button to interactively select the river reach from the Map View.

Reverse River Reach and Flip Existing Cross Section River Stationing

This radio button option allows the software to reuse the existing cross section river stationing by simply reversing the cross section. In this way, the river stations will be in the correct order with the smallest river station at the downstream end and then progressively increasing in order as cross sections move upstream.

Reverse River Reach and Revise Cross Section River Stationing

This radio button option allows the user to control the cross section river stationing by defining the starting (downstream most) cross section river station, and then identifying the cross section river station increment values as they move upstream.

The following options are available:

Once the options are defined, click the [OK] button, and the software will reverse the direction of the selected river reach.