Watershed and groundwater modeling, done for you
You have a basin, a site, or a contamination question and a deadline attached to it — a permit renewal, a discharge investigation, a litigation timeline, a management plan due to a funder. You need a defensible model and the report that goes with it, not a login. SWATGENX LLC builds and delivers that work.
What we do for you
Watershed model development
A calibrated SWAT+ model for a named basin or gauged site, built on the same national pipeline that generates our public example models — configured to your delineation, your data, and the question you’re answering.
PFAS fate and transport assessment
Coupled SWAT+/MODFLOW 6 modeling of PFAS pathways from source through the unsaturated zone into groundwater and surface water, including sorption and retardation appropriate to the site.
Calibration and validation to your observed record
Automated multi-objective calibration (particle swarm optimization) against streamflow, head, or concentration observations, with the diagnostics and convergence history documented for review.
Groundwater modeling
MODFLOW 6 builds from structured lithology and well records, standing alone or coupled to a surface-water model.
Data assembly, where public data is the bottleneck
National hydrography, climate, soils, and well-record assembly and harmonization for a site or region, delivered as a usable dataset even where a written report isn’t the end goal.
How engagement works
A project starts with a scoping conversation: the watershed or aquifer, the question being answered, the data you already have, and your delivery timeline. We return a written quote and begin on acceptance; invoicing follows delivery, or by milestone for larger or multi-site work.
Price depends on the work
— the number of sites, the coupling required, the calibration effort, and the reporting depth — so there is no list price on this page; every project is scoped before it is priced.
What you get
- The model itself — the built and calibrated SWAT+ or SWAT+/MODFLOW 6 project.
- A written report documenting methods, data sources, calibration performance, and results, prepared to the standard a regulatory submission, litigation, or peer review requires.
- The assembled dataset behind the model, in a usable form.
- A reproducible package — the inputs and configuration needed to rerun or extend the work, not a black box.
- You own what we deliver — the model, the report, and the data package are yours. The underlying SWATGenX platform and pipeline that built them remain ours.
Where the subscription fits
Every delivered project runs on a SWATGenX account, at the tier that matches what you need to host and keep working with it — that’s the subscription, and it’s the access and compute layer underneath the project, not a separate sale. See Pricing for the tiers.
Proof point
Our public example fleet for west-central Florida — the Peace, Myakka, and Hillsborough River watersheds draining to Charlotte Harbor and Tampa Bay — shows the same pipeline and calibration process this page describes: automated model builds finished with harvested groundwater data, regional hydrostratigraphy, and calibration against observed streamflow (NSE 0.97 Peace, 0.94 Hillsborough, 0.88 Myakka). See the Florida coupled-fleet example for the watershed detail and the SWAT+/MODFLOW 6 coupling work for the PFAS fate-and-transport method demonstrated on Wurtsmith Air Force Base, a public site.
Start a project
Tell us the basin or site, the question, and the deadline. We reply with what we would need and a written quote.
SWATGENX LLC is a Michigan limited liability company, independent of any university, research institution, or government agency.