RIVIA

RIVIA is a Python package designed to interact programmatically with U.S. Army Corps of Engineers HEC-RAS hydraulic models. It provides typed Python interfaces and object models for parsing and editing native HEC-RAS project files—including plan files (.p**), steady and unsteady flow files, and geometry files—alongside modules to trigger model runs and extract HDF5 simulation results.

Practising water resources engineers reach for RIVIA to construct automated modeling pipelines, run batch scenario simulations, perform sensitivity analyses, or extract spatial results programmatically without operating the HEC-RAS graphical user interface. While it streamlines HEC-RAS workflows, running HEC-RAS simulations directly requires a local installation of HEC-RAS or its execution binaries on the host system.