Visualize levee breach from water body inside project area use case (Water Overlay)

When a levee breaks water is free to flow through the breach and onto otherwise dry land. There are multiple ways of simulating a breach in a levee.

This scenario assumes the water body from which water will flow through the levee is located in the project area in its entirety.

Requirements

Before implementing this use-case, make sure you have a basic water model set up. For the specified scenario, the flooding overlay is required.

Also ensure the following in your project, if possible:

• The hydrological system has a SURFACE_LAST_VALUE or WATER_STRESS result type, either as main result or as a child result type.
• The simulation is set up to output a reasonable amount of timeframes. For a stabilization case, one timeframe per 12 hours of simulation time is reasonable.

Steps

The use-case can be implemented through the following steps.

How to manually add a breach:

1. Configure a base hydrological system.
2. Add a new Area to the project.
3. Draw the Area in the location where the breach should take place. Make sure it extends all the way from the water to the floodable land.
4. Add the breach height attribute to the Area.
5. Ensure the overlay is (re)calculated.
6. Inspect the "Surface last value" result overlay.
7. Select the "play" option in the overlay's legend. The animation will show the flow of the water from the breach.

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Notes

Multiple breaches can be added to the same project.