ANUGA
Open Source
Open-source 2D shallow-water modelling in Python from Geoscience Australia — strong for dam break and tsunami.
21 tools · Category
Hydraulics & River Systems
River hydraulics tools answer the question hydrology raises: where does the water go, how deep, and how fast? Here you will find 1D and 2D hydraulic solvers, open-channel and structure calculators, dam-break and flood-propagation models, and the automation layers that script them. HEC-RAS dominates practice, so we index not just the model itself but the growing ecosystem of Python controllers, results readers and geometry generators built around it — alongside genuine open-source alternatives.
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BASEMENT
Free
ETH Zurich's free 2D hydraulics and morphodynamics simulator — rivers, sediment and hazard mapping.
CaMa-Flood-GPU
Open Source
GPU reimplementation of the CaMa-Flood global river routing model — continental flood simulation on PyTorch/Triton.
Delft3D FM
Open Source
Deltares' open flexible-mesh suite for rivers, estuaries and coasts — hydrodynamics to morphology.
FHWA Hydraulic Toolbox
Gov-Public
A free bundle of FHWA drainage calculators: channels, weirs, curb & gutter, riprap, detention and more.
FastFlood
Free
Rapid flood modelling in the browser — steady-state inundation estimates in seconds, anywhere on earth.
Flood Modeller
Freemium
Jacobs' 1D/2D river and floodplain suite — a UK practice staple with a genuinely useful free tier.
HEC-Commander Tools
Open Source
Jupyter notebook suite for batch HEC-RAS and HEC-HMS runs — parallel execution and calibration statistics.
HEC-RAS
FreeVerified
The world's most used hydraulic model: free 1D/2D river analysis, sediment, water quality and flood mapping.
HY-8
Gov-PublicVerified
FHWA's free culvert analysis program — the reference implementation of HDS-5 culvert hydraulics.
Iber
Free
Free Spanish 2D hydraulic model — flow, turbulence, sediment and habitat modules behind a full GUI.
LISFLOOD-FP
Open Source
The Bristol raster flood model behind global flood maps — open source with GPU-accelerated solvers.
MIKE+
Commercial
DHI's unified platform for rivers, urban drainage and distribution networks — successor to MIKE 11/MIKE URBAN.
RAS Commander
Open Source
Python automation for HEC-RAS 6.x: batch runs, parallel execution and HDF results extraction.
RIVIA
Open Source
A modern Python interface for HEC-RAS project parsing, simulation automation, and result visualization.
SFINCS
Open Source
Deltares' reduced-complexity compound flood model — coastal, fluvial and pluvial drivers in one fast solver.
SRH-2D
Free
The US Bureau of Reclamation's free 2D river model — FHWA's preferred engine for bridge hydraulics.
TUFLOW
Commercial
Benchmark-setting commercial 1D/2D flood engine with GPU acceleration — dominant in AU/UK flood studies.
openTELEMAC
Open Source
EDF's open-source finite-element suite for free-surface flow — 2D/3D rivers, estuaries, waves and sediment.
pyHMT2D
Open Source
Python control and post-processing for 2D hydraulic models — SRH-2D and HEC-RAS 2D results to VTK and beyond.
rashdf
Open Source
Read HEC-RAS HDF5 geometry and results into GeoPandas/xarray — built for FEMA's flood-risk data pipelines.