How to add sewer data (Water Overlay)

This article is a stub.

For some use cases, it may be important to include sewer functionality in the calculation. Sewers form additional storage for water, and can either store this water indefinitely, slowly remove the water from the hydrological model, or let the water flow in a controlled fashion back onto the surface. Sewers are most relevant for non-sudden excessive water scenarios, such as heavy rainfall.

For the purpose of this use case, a simple hydrological model will be assumed. We will also assume there is an appropriate amount of water present in or added to the model for the sewer to function in a relevant capacity.

Requirements

Before implementing this use-case, make sure you have a basic water model set up. For the specified scenario, the rainfall overlay will suffice, though any variant will work.

Also ensure the following in your project, if possible:

• The hydrological system has an excess of water in an urban area. This can be due to rain, inundation, or an inlet.
• The excess of water is not too excessive, greatly exceeding the reasonable capacity of a potential sewer.
• The simulation is set up to output a reasonable amount of timeframes. For most simulation durations, 25 to 50 timeframes will suffice.

Steps

The use case can be implemented through the following steps.

How to add a sewer to a project:

1. Configure a base hydrological system.
2. If you have geo data for sewers, import your sewer area data. If you do not have geo data for sewers, generate sewer area data.
3. If you have data for sewer overflows, import your sewer overflow data.
4. The configuration wizard of the overlay can now be closed.

Notes

To see whether the generation or import of the sewer areas completed succesfully, you can add a BASE_TYPES result type to the overlay.