SWMM Continuous Simulation

Simulation Engine

Idle

Project name

Display

Details & notes

SWMM runs in native project units; Display only changes charts and summary numbers here (not the .inp).

Simulations use one full calendar year. Set Year (or leave empty for the default year); custom start/end dates are not available.

Load climate uses Open-Meteo from your browser. Run SWMM needs node server.mjs on port 8080.

Set coordinates below or click the map. Open-Meteo ERA5-Land hourly precipitation drives the rain gage.

Latitude

Longitude

Year

Start

End

> Pick a location, then load climate or run SWMM…

Open-Meteo request URL

Hourly preview

-- Total rainfall (in)

Option	Total runoff (in)	Total retention (in)	% Retention

Click to place the simulation point · drag the marker to adjust

Hourly precipitation and 2 m air temperature (same data fed to SWMM; engine uses SI internally).

Aggregated monthly performance metrics