Stormwater Run - [source code]
Routes a design storm over the graded terrain and reports ponding depth, flow velocity and flood hazard. Two modes. FAST is terrain analytics only — slope, flow direction, contributing area and the capacity of every depression — which recomputes between grading edits and answers most of a grading review. FULL adds a shallow-water solve for the depths and velocities a design storm actually produces. SURFACE ROUTING ONLY: no pipe network, no soakaways, no evapotranspiration. Use it for design-storm and cloudburst checks, not for hydraulic sizing.
Input
| Name | Nickname | Description | Type |
|---|---|---|---|
| Grid | The rasterised site from Stormwater Grid. | Generic Data | |
| Storm | The design storm from Design Storm. Not needed in Fast mode, which reads the terrain alone. | Generic Data | |
| Settings | Solver settings. Leave unconnected for defaults suited to a 1–5 m urban raster. | Generic Data | |
| Mode | Fast: terrain analytics only — instant, and enough for most grading questions. Full: adds the shallow-water solve for depth and velocity under the design storm. | Text | |
| Run | Route the storm. Works as an inline button or as a wired toggle — with a wire held true, the run relaunches whenever the inputs change. | Boolean |
Output
| Name | Nickname | Description | Type |
|---|---|---|---|
| Result | The whole run as ONE item, for Deconstruct Stormwater, Ponding Report and Stormwater Flowlines. It is not a tree on purpose — a run holds millions of values, and emitting them here would freeze the canvas. | Generic Data | |
| Summary | Peak depth and velocity, ponding capacity, the mass balance, and the caveats that belong with any number taken from this run. | Text | |
| Peak Depth | Peak | Deepest ponding anywhere on the site (mm). | Number |