mod-PATH3DU

3D particle tracking engine for groundwater flow models.

mod-PATH3DU is a modernized particle tracking engine built in Rust with Python bindings via PyO3. It supports unstructured grids (MODFLOW-USG), adaptive Runge-Kutta integration, the Waterloo method and SSP&A (Papadopulos) method for velocity interpolation, and stochastic dispersion (GSDE and Ito formulations).

Quick Links

• Installation — Get up and running
• Quickstart — Your first simulation in Python
• Schema Reference — Full configuration contract
• Python API — Type signatures and class reference
• Examples — Validated, copy-paste-ready examples
• SSP&A Workflow — Particle tracking from head maps

For AI Agents

Machine-readable references are available at:

• llms.txt — Condensed project summary (< 4KB)
• llms-full.txt — Complete schema, stubs, and examples
• Raw artifacts — Direct access to .pyi stubs and JSON Schema (available after deployment)