Python Wrapper for Stormwater Management Model (SWMM5)

Website

www.pyswmm.org

Video Tutorial Series:

PySWMM YouTube Channel

Documentation

PySWMM Documentation

Examples

PySWMM Example Bundles

Cite our Paper

McDonnell, Bryant E., Ratliff, Katherine M., Tryby, Michael E., Wu, Jennifer Jia Xin, & Mullapudi, Abhiram. (2020). PySWMM: The Python Interface to Stormwater Management Model (SWMM). Journal of Open Source Software, 5(52), 2292, https://doi.org/10.21105/joss.02292

Setting a manhole inflow during a running simulation!

PySWMM is a Python language software package for the creation, manipulation, and study of the structure, dynamics, and function of complex networks.

With PySWMM you can load and manipulate USEPA Stormwater Management Models. With the development of PySWMM, control algorithms can now be developed exclusively in Python which allows the use of functions and objects as well as storing and tracking hydraulic trends for control actions.

As of version v1.1.0, PySWMM includes new features to process metadata and timeseries stored in SWMM binary output file.

PySWMM is used by engineers, modelers, and researchers who want to streamline stormwater modeling optimization, controls, and post-processing results.

PySWMM is intended to provide

• tools for the study of the structure and dynamics within USEPA SWMM5,
• a standard programming interface and graph implementation that is suitable for many applications,
• a rapid development environment for collaborative, multidisciplinary projects,
• an interface to USEPA SWMM5,
• development and implementation of control logic outside of native EPA-SWMM Controls,
• methods for users to establish their own node inflows,
• a coding interface to binary output files,
• new modeling possibilities for the SWMM5 Community.

Get the latest version of PySWMM from PyPI See the Quick Guide!

$ pip install pyswmm

A quick example that steps through a simulation:

Examples:

See the Latte Example

from pyswmm import Simulation, Nodes, Links

with Simulation(r'Example1.inp') as sim:
    Node21 = Nodes(sim)["21"]
    print("Invert Elevation: {}". format(Node21.invert_elevation))

    Link15 = Links(sim)['15']
    print("Outlet Node ID: {}".format(Link15.outlet_node))

    # Launch a simulation!
    for ind, step in enumerate(sim):
        if ind % 100 == 0:
            print(sim.current_time,",",round(sim.percent_complete*100),"%",\
                  Node21.depth, Link15.flow)

Opening a SWMM binary output file and accessing model metadata and timeseries.

from swmm.toolkit.shared_enum import SubcatchAttribute, NodeAttribute, LinkAttribute
from pyswmm import Output

with Output('model.out') as out:
    print(len(out.subcatchments))
    print(len(out.nodes))
    print(len(out.links))
    print(out.version)
    sub_ts = out.subcatch_series('S1', SubcatchAttribute.RUNOFF_RATE)
    node_ts = out.node_series('J1', NodeAttribute.INVERT_DEPTH)
    link_ts = out.link_series('C2', LinkAttribute.FLOW_RATE)

Our issue tracker is at https://github.com/OpenWaterAnalytics/pyswmm/issues. Please report any bugs that you find. Or, even better, fork the repository on GitHub and create a pull request. All changes are welcome, big or small, and we will help you make the pull request if you are new to git (just ask on the issue).

Please check out our Wiki https://github.com/OpenWaterAnalytics/pyswmm/wiki for more information on contributing, including an Author Contribution Checklist.

Distributed with a BSD2 license; see LICENSE.txt:

Copyright (C) 2014-2023 PySWMM Developers
Community-Owned See AUTHORS and CITATION.cff

• Assela Pathirana