SWATGenX: a working watershed model for your river, from national data

Every river starts with a question. Will there be enough water next summer? Where does the nitrate come from? What is happening in the ground beneath it?

Answering it takes a watershed model. Building one usually means months of collecting and preparing data before the science can begin.

SWATGenX builds the model before you collect a single file. Choose a stream gauge or a watershed anywhere in the lower forty-eight states, and we build a complete, ready-to-run SWAT+ model for it from national data, usually within a couple of hours.

Its streams, subbasins and the catchments inside each one come from the USGS high-resolution hydrography. Its land use and soils are drawn into hydrologic response units, all in one model you can open on the map and run.

For a watershed with streamflow gauges, you can calibrate your model inside our cloud computing.

The calibration fits the model to the gauge's daily flow, and the run's chart and fit scores appear on your dashboard. In Lower Michigan, Indiana, Minnesota, Ohio and Wisconsin, a groundwater study adds MODFLOW beneath it. Download the SWAT+ input files, the GIS project and a record of its data sources, and run it yourself.

Around it is a national map of the data water work depends on: millions of well records, thousands of stream gauges, water-quality measurements, and specialist data such as PFAS.

Work in your browser, from Python, or from your AI assistant through our MCP server, whose tools find, build and download models for you.

Every model on our servers stays in our care.

If we change something that affects it, we update yours and tell you what changed.

Every river has a question. We build the model to answer yours. Request a proposal at swatgenx.com.