HEC-ResSim
Free
Reservoir system simulation from HEC — operating rules, flood control and multi-reservoir networks, free.
Pywr
ActivePython water-resource network simulator — fast LP-based allocation for reservoir systems and supply networks.
- Pricing
- Open Source
- License
- GPL-3.0
- Commercial use
- Permitted
- Ecosystem
- Python
- Platform
- Windows, macOS, Linux
Install
pip install pywrAbout Pywr
Pywr simulates water-resource networks — reservoirs, transfers, demands, environmental flows — by solving an allocation problem (linear programme) at every timestep. Models are defined in JSON or Python, run very fast, and integrate cleanly with pandas and the scientific Python stack, which makes Pywr well suited to Monte Carlo yield studies, climate-scenario screening and optimisation-in-the-loop work.
Developed at the University of Manchester and used in national-scale water resource planning (including England's regional water resources programme), it is one of the most credible open alternatives to commercial system-simulation packages like WEAP or Aquator.
Where it fits in the workflow
TerrainCatchmentRainfallRunoffRoutingHydraulicsMappingReporting
Alternatives to Pywr
Ranked by the topics, categories and workflow stages they share with Pywr.
WEAP
Freemium
Integrated water resources planning and policy analysis framework for basin-scale supply and demand modeling.
hms-commander
Open Source
Python automation for HEC-HMS — batch and parallel runs, design storms, and DSS handoff to HEC-RAS.
Caravan
Open Source
The open global large-sample hydrology dataset — thousands of catchments with forcing, attributes and streamflow.
HEC-Commander Tools
Open Source
Jupyter notebook suite for batch HEC-RAS and HEC-HMS runs — parallel execution and calibration statistics.
NeuralHydrology
Open Source
Deep-learning rainfall-runoff modelling — the LSTM framework behind much of ML hydrology research.