Basic water model use case (Water Overlay)
For all effective uses of any variant of the water overlay, it is strongly recommended to load in data for a stationary water system. The behavior of any water, whether it's pre-existing, expected inflow, or due to natural event or calamity, is affected by the presence of features which can capture or steer water in other directions. The more real-world hydrological features and hydrological constructions are loaded in, the more accurately the water flow can be simulated.
The first step is preparing your data. Note that data can be skipped if you do not have this data, or the data is not applicable for your project. The following data should be prepared:
| Data | Description | Alternative/default |
|---|---|---|
| Water areas | Water areas set the water level of all open water in the area they envelop. | In the configuration wizard, it is possible to generate a single water area for the entire project area. |
| Ground water | Only relevant for groundwater overlays. Will set the height of the saturated zone's water in the underground. | The groundwater overlay will assume the entire ground is saturated. Other overlays will not use the underground water model. |
- Add a new area by clicking in the bottom left corner.
- Select the newly created area (named Area) and give it a fitting name on the right
- Zoom in to the location where you want to have the breach and click on the Adjust area button
- Select the location of your breach and click on Apply settings. Make sure the breach is not connected to the water body and ideally draw it on the inside of the dike.
- Go to the tab attributes and add the breach floor attribute and the outlet capacity. The outlet capacity is the volume of the waterbody. Also add either the outlet Q or the outlet level to determine how much water will flow through the breach.
- Prepare data
- Prepare properties
- Prepare result types
Use the steps described on the How to configure a Water Overlay page, to create the initial model.