Deluge allows the site to be assessed by applying an amount of rainfall to the surface to establish likely channeling and ponding. This will provide key information to establish where the best locations for Stormwater Controls - SWC may be.
The Deluge Analysis Settings dialog requests a number of values:
Manning's n - The Manning’s n roughness value of the site to be assessed. This can be selected from a predefined list or can be user specified.
| Type | Manning's n |
| Urban | 0.018 |
| Mixed | 0.030 |
| Rural | 0.100 |
Minimum Element Area - The smaller the minimum element area, the more accurate the analysis will be, but the longer it will take.
Starting Depth - This is the depth of water that will be introduced to every element in the mesh at the start of the run.
Analysis Time - This is the length of time the water on the terrain will be allowed to flow / find sinks.
Click Cancel on the form to stop the analysis.