Question 1

Where can I find SWAT+ or watershed modeling for my state?

Accepted Answer

Start at https://www.swatgenx.com/swat-plus-modeling—the U.S. hub for watershed and SWAT+ modeling by state. Pick your state from the index, open its landing page to review one documented example basin (maps, HRUs, channels, national inputs), then use Watershed Explorer for your own USGS gage or HUC. Example: Florida at https://www.swatgenx.com/swat-plus-modeling/florida.

Question 2

What national datasets and resolutions do SWATGenX models use?

Accepted Answer

CONUS builds use USGS WBD/HUC extent; NHDPlus HR at 1:24,000; 3DEP DEM resampled from 10 m to 30 m for terrain and slope; NLCD land cover and gSSURGO soils, gridded at 250 m for most models and 30 m for some (both from 30 m source grids); PRISM precipitation and temperature on a ~4 km × 4 km grid; and NSRDB solar radiation at the same ~4 km grid cells (from ~4 km, 30-minute data aggregated to daily). Wind is NSRDB's too, unless its values for any cell are implausibly low, when the whole model uses gridMET wind instead. State pages show HRU counts, channels, and stream length for one sample basin in each state.

Question 3

Are SWATGenX state pages the same workflow everywhere in CONUS?

Accepted Answer

Yes. The index at https://www.swatgenx.com/swat-plus-modeling links one documented sample model per published state. The underlying assembly path and national data stack are consistent across CONUS; only the example basin and regional context change by state.

Question 4

What is the difference between SWAT and SWAT+?

Accepted Answer

SWAT (legacy) and SWAT+ (current) are process-based watershed models used for hydrology, nutrients, and land-management studies. SWATGenX automates SWAT+ project assembly from national datasets across all CONUS states.

Question 5

How do I build a SWAT+ model for a specific state?

Accepted Answer

Open https://www.swatgenx.com/watershed-workspace, pick a basin in your state (USGS gage, HUC12, or HUC8), screen on the map, then queue a SWAT+ model build. Packages are delivered for SWAT+ Editor with documented data lineage.

Browse SWAT+ model packages by state

States with published model packages

Explore further