MODFLOW-USG vs Watershed Modeling System (WMS)

MODFLOW-USG7.8Visit Watershed Modeling System (WMS)7.6Visit

Higher score MODFLOW-USG #6 in Groundwater Modeling Software 7.8/10 Free plan Free plan✓ 0 of 3 features Visit USGS

vs

Watershed Modeling System (WMS) #7 in Groundwater Modeling Software 7.6/10 Free plan Free plan✓ 3 of 3 features Visit Aquaveo

• MODFLOW-USG fits best

  Unstructured grids and complex well or conduit systems

• Watershed Modeling System (WMS) fits best

  Watershed teams modeling surface-water interactions

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Side by side

Feature	MODFLOW-USG 7.8/10 Visit ↗	Watershed Modeling System (WMS) 7.6/10 Visit ↗
At a glance
Editor score	7.8	7.6
Ranking	#6 in Groundwater Modeling Software	#7 in Groundwater Modeling Software
Best for	Unstructured grids and complex well or conduit systems	Watershed teams modeling surface-water interactions
Pricing model	Free	Free plan + paid
Starting price	Free plan	$3,990 one-time
Free plan	✓	✓
Free trial	—	—
Deployment	Self-hosted	Desktop
Support	Email	Phone, Email, Community, Docs
Built for	Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features MODFLOW-USG 0/3 · Watershed Modeling System (WMS) 3/3
Transport modeling	Not checked yet	✓ (best)
Surface-water coupling	Not checked yet	✓ (best)
GIS data exchange	Not checked yet	✓ (best)
Specs
Flow modeling method	Finite-difference	Finite-difference
Model dimensions	Not checked yet	2d
Supported platforms	Not checked yet	Windows
Our review
Pros	Handles structured, unstructured, nested, and multi-shape grids Models arbitrary cell connectivity with Ghost Node Correction Represents multi-node wells, karst conduits, tile drains, and networks	Delineates watersheds and sub-basins from terrain data. Connects GIS workflows with hydrologic and hydraulic modeling. GSSHA supports 2D groundwater–surface-water interaction and contaminant modeling.
Cons	Self-hosted deployment requires local installation and management Support is provided through email rather than broader channels Flow-focused scope suits fewer transport and surface-water workflows	Groundwater modeling is centered on integrated GSSHA, not standalone simulation. Runs on Windows as desktop software. Paid editions start at $3,990 one-time.
Our verdict	MODFLOW-USG is a USGS groundwater-flow model for teams working with structured or unstructured grids, nested layouts, multiple cell shapes, and complex subsurface connections. Its control-volume finite-difference formulation allows each… Read the review →	Watershed Modeling System (WMS) is Windows desktop software for building and analyzing watershed models. It is aimed at teams working across terrain and GIS data, watershed delineation, hydrology, hydraulics, and floodplain mapping.… Read the review →

Strengths and trade-offs

• MODFLOW-USG — where it wins

  • Handles structured, unstructured, nested, and multi-shape grids
  • Models arbitrary cell connectivity with Ghost Node Correction
  • Represents multi-node wells, karst conduits, tile drains, and networks

  Where it doesn't

  • Self-hosted deployment requires local installation and management
  • Support is provided through email rather than broader channels
  • Flow-focused scope suits fewer transport and surface-water workflows

• Watershed Modeling System (WMS) — where it wins

  • Delineates watersheds and sub-basins from terrain data.
  • Connects GIS workflows with hydrologic and hydraulic modeling.
  • GSSHA supports 2D groundwater–surface-water interaction and contaminant modeling.

  Where it doesn't

  • Groundwater modeling is centered on integrated GSSHA, not standalone simulation.
  • Runs on Windows as desktop software.
  • Paid editions start at $3,990 one-time.

• MODFLOW-USG7.8/10 · Free plan

  A free, self-hosted MODFLOW variant for irregular grids and specialized groundwater systems.

  Visit USGSFull verdict →
• Watershed Modeling System (WMS)7.6/10 · Free plan

  A broad watershed toolkit with groundwater interaction modeling, not a standalone groundwater simulator.

  Visit AquaveoFull verdict →