The JWMM has published another paper! Visit www.

Call for abstracts ICWMM 2025 (March 5 - 7) | Submit today!

Water quality modeling using PCSWMM workshop in Guelph, ON (December 3)

The Journal of Water Management Modeling has published this paper about reducing flood risk through the implementation of LIDs.

The Journal of Water Management Modeling has published this interesting study "Reparametrizing the Antecedent Moisture Model" by David Edgren, Robert...

The JWMM continues to publish thought provoking papers.

ICWMM 2025 | Early bird registration now open! (March 5 - 7)

The Journal of Water Management Modeling recently published "Anticipating Soil Erosivity of Kulfo Watershed in the Southern Main Ethiopian Rift in...

Visit the Journal of Water Management Modeling site www.chijournal.org to read the 2nd paper in the Special Issue for the HYDRO 2023 conference in...

The JWMM recently published this paper by Moh. Iqbal Huseiny, Arno Adi Kuntoro, Eka Oktariyanto Nugroho, and Muhammad Syahril Badri Kusuma from...

PCSWMM/SWMM5 3-day training workshop in Durban, South Africa (October 8 - 10)

PCSWMM/SWMM5 training workshop | Guelph, ON (September 24 & 25)

The JWMM is proud to announce the publication of the first paper in a Special Issue dedicated to the top papers from the HYDRO 2023 Conference hosted...

The JWMM recently published this paper by Seyedhossein Sajadifar, and Marjan Pakseresht.

The JWMM is pleased to announce the publication of our latest paper "Verification of Three-dimensional Numerical Study of Scour in Channel, Sudden and...

The Journal of Water Management Modeling is happy to announce the publication of "A Comprehensive Review on Sediment Transport, Flow Dynamics, and...

Visit the JWMM website http://chijournal.org to read this new paper by Pham Duc Dai, and others today.

The Journal of Water Management Modeling has published "Resilient Stormwater Management of a Coastal Catchment" by Abrar Habib, Dilek Eren Akyuz,...

PCSWMM + EPA SWMM5 Workshop in Guelph, ON (May 28 - 29) - early bird rate

The Journal of Water Management Modeling @chijournal.

Last chance to register ICWMM 2024 | PCSWMM + EPA SWMM5 workshop

"A Bio-inspired and Deep Learning Based Hybrid Model for Agricultural Drought Assessment" by Shilpa Chaudhari, Aniketh Anchalia, Anirudh Kakati, Ankit...

Do you have a research project you would like to share with the OPEN SWMM community? Visit the OPEN SWMM website to join our forum and/or learn about...

ICWMM 2024 (February 28 - 29) | Register before price increase!

The JWMM is happy to announce that "E. coli Levels Associated with Source Waters and Household Handling Practices of Potable Water in Peri-urban Phnom...

Register today for ICWMM 2024 | PCSWMM + EPA SWMM5 workshop

"Modeling Optimal Canal Conveyance Capacity for the Ahero Irrigation Scheme using the Hydrologic Engineering Centre River Analysis System (HEC-RAS)"...

Call for abstracts ICWMM February 2024 | Toronto, ON

"Surface Water Quality Assessment, Prediction, and Modeling of the River Daya in Odisha" by Pramod Kumar Jena, Sayed Modinur Rahaman, Pradeep Kumar...

ICWMM 2024 Toronto, ON | Early bird registration is open!

"The Elephant and the Goddess: How Water Systems Models Could Help Preserve Civil Life" by William James (CHI's Founding President) is now available...

JWMM: Call for Editors | ICWMM Back in person!

"Challenges in Implementing ICT Tools in Water and Sanitation Services Management in South Africa" by Tafadzwa Jaquline Mukasi and Olabanji Oni is now...

"Long Memory, Time Trends, and the Degree of Persistence in Water Temperatures of Five European Rivers and Lakes" by Luis A. Gil-Alana, María Jesús...

ICWMM call for abstracts | Toronto, ON (February 28 & 29, 2024)

PCSWMM/SWMM5 3-day training workshop in Stellenbosch, South Africa (October 24 - 26)

ICWMM We are back in-person | February 28-29, 2024

"The Variation of Water Parameters along the Bandawaya Valley, Northern Iraq" by Ali M.

Upcoming PCSWMM + EPA SWMM5 Workshops in South Africa

PCSWMM/SWMM5 3-day training workshop in Prince’s Grant, South Africa (September 26 - 28)

"A new two-dimensional dual permeability model of preferential water flow in the vadose zone" by Charalampos Paraskevas and Christos Babajimopoulos is...

Discover these recently posted research projects when you visit the OPEN SWMM site:

"Numerical Simulation of Flood Propagation in the Kelara River Flood Early Warning System" by Farouk Maricar, Riswal Karamma, Muhammad Rifaldi...

"Rainfall-flow Modeling Using a Global Conceptual Model: Case of the Beni-Bahdel Watershed (Northwest of Algeria)" by Sid Ahmed Bouguerra and Bekhta...

"Investigating the Accuracy of Hybrid Models with Wavelet Transform in the Forecast of Watershed Runoff"" by Mohammad Javad Saravani, Sahar Kashef,...

This script tool takes the maximum surface area of each storage unit, generates a circular polygon of equivalent surface area, and creates a...

ICWMM 2023 (Virtual March 1 - 2) | Still have time to register!

ICWMM 2023 (a virtual event March 1-2) | Program is live, don't miss out!

'Modeling the Rainfall-Runoff Relationship with TOPMODEL in the Wadi El Kebir Watershed' by Noureddine Maref, Khaled Korichi, and Zakaria Mahfoud is...

ICWMM 2023 (March 1-2) | Keynote speaker announced + late registration fee

'Drivers of Model Uncertainty for Urban Runoff in a Tropical Climate: The Effect of Rainfall Variability and Subcatchment Parameterization' by Kim...

Last call for abstracts for ICWMM 2023 - Don't miss out on presenting!

Model-based Analysis of Nitrogen Dynamics in the Tigris River in Baghdad City' by Muwafaq H. Al Lami, Imzahim A. Alwan, and Hameed S. Ismael is now...

Call for abstracts ICWMM 2023 | Submit today to present!

ICWMM 2023 (virtual event) | Register today!

"An Application of Computational Fluid Dynamics to the Hydraulic Analysis of a Water Intake Tower" by Mark Wilsnack, South Florida Water Management...

ICWMM 2023 (virtual event) | Early Bird Registration Now Open!

"A Width Parameter Estimation Through Equivalent Rectangle Methodology for Hydraulic Modeling Applications" by Ricardo Bonilla Brenes, Rafael Oreamuno...

Monitoring of Pressure Transients in Great Lakes Water Authority Water Transmission System

ICWMM 2023 (March 1-2) | Call for Abstracts OPEN!

PCSWMM + EPA SWMM5 training workshop in Stellenbosch, South Africa (October 11 - 13)

Publish your research with the Journal of Water Management Modeling

Visit chijournal.org to read the Journal of Water Management Modeling's latest publication ""The Effectiveness of Centralized versus Decentralized...

Visit the Journal of Water Management Modeling website to read our latest publication: "A Novel Statistical Modeling Approach to Developing IDF...

Journal of Water Management Modeling - Submit your paper, Join our Editorial Board

ICWMM 2022 a virtual event (March 2 - 3) | Last chance to register

Interested in learning how to expand capabilities for analyzing stream flow alterations and the effects on flows of environmental flow standards?...

This study reveals the large uncertainty caused by calibration and validation criteria, and highlights the importance of considering model computation...

ICWMM 2022 (March 2-3) | Keynote speakers announced + late registration fee

Last call for papers for ICWMM 2022 - Submit today to present virtually (March 2 & 3)

ICWMM March 2-3, 2022 (virtual) - Register Today

ICWMM 2022 Call for abstracts - a Virtual Event (March 2 & 3)

ICWMM March 2-3, 2022 (virtual) - Register Today for Early Bird Rate

Call for papers for ICWMM 2022 - a virtual conference - March 2-3, 2022

Upcoming PCSWMM, EPA SWMM5 and EPANET2 Online Training Courses

Have you ever wondered how trees impact urban stormwater management? The latest paper in JWMM uses urban tree rainfall interception measurements and...

We have released our list for CHI's upcoming workshops! This year there will be several introductory workshops along with specialty workshops to cover...

PCSWMM 7.4.3216 point release

New Virtual Live PCSWMM/SWMM Workshops

This script example demonstrates how to find the unique values of any attribute in a model layer or background layer. In this example, unique conduit...

This script example sets any attribute value in a model layer or background layer based on another attribute value in the same layer. For example,...

This script example demonstrates how to save point x and y coordinates along with another point attribute to a text file. The text file has xyz...

This script example summarizes the total pipe length, grouped by selected attributes in the Conduits model layer. The attribute can be a model or...

This script example selects the conduits with three or more vertices on the Map panel and prints the conduit name and number of vertices in the script...

This script example assigns the subcatchment 'Raingage' attribute.

In the latest paper on JWMM, data collected in Montreal was used to verify the ability of the Bioretention LID Control to accurately simulate outflow...

Virtual Conference ICWMM 2021 - Registration Closing Soon

Call for Papers, International Conference on Water Management Modeling, Virtual Event (Feb 24-25, 2021)

The 54th International Conference on Water Management Modeling is going virtual! The ICWMM brings together professionals from around the world to...

ICWMM 2021 - Register Today for Early Bird Pricing

Call for Papers, International Conference on Water Management Modeling, Virtual Event (Feb 24-25, 2021)

In the latest post on JWMM, a study investigates the performance of the Tank hydrologic model in predicting rainfall-runoff at various spatial scales....

CHI is excited to announce we have released PCSWMM 7.3! This version has many new features including:

The latest paper in JWMM conducts a comparison of 2-dimensional hydraulic models produced in HEC-RAS and PCSWMM. The case study is a frequently...

Self-Paced PCSWMM/SWMM at home online training opportunity

The latest paper on JWMM provides a SWOT analysis of wastewater reuse in Tehran, Iran to evaluate public opinion on the subject. Follow the link below...

Watershed Modeling using PCSWMM + EPA SWMM5 Workshop in Guelph, ON (March 25 - 26)

PCSWMM + EPA SWMM5 Workshop in Durban, South Africa (April 7 - 9) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Philadelphia, PA (April 15 - 16) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Seattle, WA (April 8 - 9) - early bird rate

ICWMM in Toronto, ON (February 26 + 27, 2020) - Last chance to register!

Watershed Modeling using PCSWMM + EPA SWMM5 Workshop in Guelph, ON (March 25 - 26) - early bird rate

CHI is now hosting specialty workshops! Each workshop will explore a specific aspect of modeling in PCSWMM and take place in our new facilities at CHI...

CHI has been working on exciting new features for PCSWMM’s next release! Some highlights include a raster calculator, enhanced set of DEM tools...

PCSWMM + EPA SWMM5 Workshop in Oklahoma City, OK (March 18 - 19) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Phoenix, AZ (March 11 - 12) - early bird rate

Ethiopia began constructing the Grand Ethiopian Renaissance Dam in 2011 as a means of generating hydropower, and in September 2019 it was announced...

Sustainable stormwater technologies such as bioretention cells are gaining popularity as severe flooding events become more frequent. However, there...

Last call for abstracts for ICWMM in Toronto, ON (February 26 + 27, 2020)

PCSWMM + EPA SWMM5 Workshop in Toronto, ON (February 24 - 25) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Baltimore, MD (February 12 - 13) - early bird rate

ICWMM in Toronto, ON (February 26 + 27, 2020) - Call for abstracts

CHI office 2019 winter holiday closure

PCSWMM + EPA SWMM5 Workshop in Halifax, NS (January 29 - 30) - early bird rate

PCSWMM + EPA SWMM5 Workshop in New Orleans, LA (January 22 - 23) - early bird rate

ICWMM - Toronto, ON (February 26 & 27, 2020) - Register now for Early Bird Discount!

ICWMM in Toronto, ON (February 26 + 27, 2020) - Call for abstracts

PCSWMM + EPA SWMM5 Workshop in Virginia Beach, VA (December 11 - 12) - early bird rate

PCSWMM + EPA SWMM5 Workshop in San Diego, CA (December 4 - 5) - early bird rate

PCSWMM + EPA SWMM5 1- day workshop at the Pre Latornell Conference, ON (November 18)

PCSWMM + EPA SWMM5 Workshop in Lethbridge, AB (November 13 - 14) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Johannesburg, South Africa, South Africa (October 15 - 17)

PCSWMM + EPA SWMM5 Workshop in Chicago, IL (November 6 - 7) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Atlanta, GA (November 6 - 7) - early bird rate

ICWMM in Toronto, ON (February 26 + 27, 2020) - Call for abstracts

PCSWMM + EPA SWMM5 Workshop in Guelph, ON (October 23 - 24) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Indianapolis, IN (October 9 - 10) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Houston, TX (October 2 - 3) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Boston, MA (October 2 - 3) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Halifax, NS (September 25 - 26) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Vancouver, BC (September 23 - 24) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Cape Town, South Africa (September 17 - 19) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Tampa, FL (August 28 - 29) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Calgary, AB (August 21 - 22) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Charlotte, NC (August 14 - 15) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Barrie, ON (July 17 - 18) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Kansas City, MO (June 26 - 27) - early bird rate

Planning on attending either the Canadian Water Summit or the CWRA conference as part of the Water Week at Blue? Join our instructor Karen Finney for...

PCSWMM + EPA SWMM5 Workshop in Phoenix, AZ (June 12 - 13) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Minneapolis, MN (June 5 - 6) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Pittsburgh, PA (May 22 - 23) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Cleveland, OH (May 16 - 17) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Edmonton, AB (May 15 - 16) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Ottawa and Guelph, ON (April 24 - 25) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Nashville, TN (April 10 - 11) - early bird rate

Last chance to register for ICWMM - Toronto, ON (Feb 27 & 28, 2019)

PCSWMM + EPA SWMM5 Workshop in Durban (March 26 - 28) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Seattle, WA (March 13 - 14) - early bird rate

Last Call for Abstracts - ICWMM (February 27 & 28, 2019)

ICWMM - Toronto, ON (Feb 27 & 28, 2019) - Register before price increase + PCSWMM/SWMM workshop

PCSWMM + EPA SWMM5 Workshop in Baltimore, MD (February 6 - 7) - early bird rate

CHI office 2018 winter holiday closure

ICWMM in Toronto, ON (February 27 + 28, 2019) - Call for abstracts

ICWMM - Toronto, ON (February 27 & 28, 2019) - Register for Early Bird Discount!

PCSWMM + EPA SWMM5 Workshop in Portland, OR (January 16 - 17) - early bird rate

ICWMM in Toronto, ON (February 27 + 28, 2019) - Call for abstracts

Banda Zone B1 & B3, located in Uganda, is a low-lying area characterized by informal and unplanned settlements. The main objective of this project was...

Fractal geometries can be used to overcome constraints associated with model development. In this study, two highly impervious urban catchments,...

PCSWMM + EPA SWMM5 Workshop in Vancouver, BC (December 12 - 13) - early bird rate

PCSWMM + EPA SWMM5 Workshop in San Diego, CA (December 5 - 6) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Virginia Beach, VA (November 28 - 29) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Atlanta, GA (November 28 - 29) - early bird rate

PCSWMM + EPA SWMM5 Workshops in Johannesburg, South Africa (October 23 - 25)

PCSWMM + EPA SWMM5 Workshop in Lethbridge, AB (November 14 - 15) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Chicago, IL (November 7 - 8) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Johannesburg, South Africa (October 23 - 25) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Guelph, ON (October 24 - 25) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Halifax, NS (October 24 - 25) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Boston, MA (October 4 - 5) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Houston, TX (October 10 - 11) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Cape Town, South Africa (September 11 - 13)

PCSWMM + EPA SWMM5 Workshop in Indianapolis, IN (October 3 - 4) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Fort Collins, CO (September 12 - 13) - early bird rate

ICWMM in Toronto, ON (February 27 + 28, 2019) - Call for abstracts

We're working on a new tool for fire flow analysis in EPANET with PCSWMM. This tool will assess the available flow at network junctions while a...

PCSWMM + EPA SWMM5 Workshop in Cape Town, South Africa (September 11 - 13) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Guelph, ON (September 5 - 6) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Hanoi, Vietnam (August 9 - 10)

Stormwater systems can undergo transition from free surface flows to pressurized flows during rapid filling conditions where inflows exceed the...

PCSWMM + EPA SWMM5 Workshop in Charlotte, NC (August 22 - 23) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Calgary, AB (August 15 - 16) - early bird rate

PCSWMM + EPA SWMM5 Workshop in London, ON (August 8 - 9) - early bird rate

Every year we get dozens of students asking us if they can get software for free – and the answer is yes! Through the University Grant Program, we...

PCSWMM + EPA SWMM5 Workshop in Regina, SK (July 18 - 19) - early bird rate

Curious to know what we’re working on? The next release of PCSWMM features support for Python Scripting, improvements to the SRTC tool, enhanced 1D...

Did you know PCSWMM can be used for sanitary and combined sewer modeling – not just stormwater modeling? Follow the link to see some projects in North...

It’s always wonderful to hear about student success stories with PCSWMM! Fourth year engineering students at Penn State University were able to use...

PCSWMM + EPA SWMM5 Workshop in Louisville, KY (June 27 - 28) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Winnipeg, MB (June 20 - 21) - early bird

PCSWMM + EPA SWMM5 Workshop in Minneapolis, MN (May 31 - June 1) - early bird rate

Follow-up field tests on three different parking lot pavements at one installation of rapidly cleaned out PICPs using a wide range of readily...

PCSWMM + EPA SWMM5 Workshop in Edmonton, AB (May 23 - 24) - early bird rate

This thought-provoking paper by Robert Muir, from the City of Markham, examines evidence-based policy gaps in water resources applicable to urban...

PCSWMM + EPA SWMM5 Workshop in Salt Lake City, UT (May 16 - 17) - early bird

Nile basin countries are experiencing water scarcity due to rapid growth in population and climate change. This paper by Mariam Allam, Hesham Bekhit,...

Happy #WorldWaterDay from all of us at CHI! Check out the spotlight projects on our website to see some of the amazing projects PCSWMM has been used...

This paper by Anne Mikelonis , Timothy Boe, Worth Calfee and Sang Don Lee, from the United States Environmental Protection Agency, identifies 27...

A modeling study was undertaken by Peter Klaver and Jason Rutyna, from LimnoTech, David Collins from David J. Collins Engineering, and Kurt Robinson,...

PCSWMM + EPA SWMM5 Workshops in Durban (April 10 - 12)

The photos from this year's ICWMM are up on our Facebook page! Feel free to tag yourself and share the pictures. Hope to see you all next year! Follow...

PCSWMM + EPA SWMM5 Workshop in Ottawa, ON (May 2 - 3) - early bird

A process and a set of tools are proposed by Adam Erispaha, from EmNet, and Christine Brown, from the Philadelphia Water Department, to automate the...

PCSWMM + EPA SWMM5 Workshop in Nashville, TN (April 25 - 26) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Seattle, WA (April 18 - 19) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Guelph, ON (April 18 - 19) - early bird rate

Stormwater systems undergoing rapid filling may present a variety of operational problems, one such being the displacement of manhole covers, which...

A numerical tool was developed Thomas Tiveron, Soheil Gholamreza-Kashi and Darko Joksimovic from Ryerson University to calculate the stormwater runoff...

A methodology for model calibration and evaluation that considers an annual hydrograph as a single observation instead of 365 daily observations,...

Last chance to register for ICWMM - Toronto, ON (Feb 28 & Mar 1)

PCSWMM + EPA SWMM5 Workshops in Durban (April 10 - 12) - early bird rate

The efficacy of the environmental management system (EMS) at Dallas Fort Worth International Airport (DFW) in capturing spent aircraft deicing fluids...

PCSWMM + EPA SWMM5 Workshop in Philadelphia, PA (March 28 - 29) - early bird rate

Pre-Conference workshop - PCSWMM + EPA SWMM5 in Toronto, ON (February 26 + 27)

Conventional urban drainage system implemented in Quito, Ecuador are not optimal for technical, social or environmental aspects. This paper by Diego...

When designing stormwater infrastructure, a green first approach requires realizing the full potential of green solutions before committing to gray...

A balanced stream gauge network design is required to establish scientifically defensible baseline hydrological conditions for simulating future...

PCSWMM + EPA SWMM5 Workshop in Kansas City, MO (March 14 - 15) - early bird rate

A greywater-fed green roof system was developed and studied in the city of Al Ain, United Arab Emirates (UAE). The study by Rezaul Chowdhury from the...

ICWMM - Toronto, ON (Feb 28 & Mar 1) - Register before price increase

Small drinking water treatment systems (SDWTS) for First Nations communities in northern regions of Ontario, Canada, may rely on surface water as a...

Last call for abstracts - ICWMM (February 28 & March 1, 2018)

PCSWMM/SWMM5 2-day training workshop in San Jose, Costa Rica (January 22 & 23)

As of late, modeling of urban drainage systems is often comprised of both the major and minor systems. Representing the inlet capture functions is of...

PCSWMM + EPA SWMM5 Workshop in Toronto, ON (February 26 - 27) - early bird rate

In water-scarce countries, greywater reuse is becoming a popular choice as it is the largest component of domestic wastewater. Research by Dr Rezaul...

PCSWMM + EPA SWMM5 Workshop in Virginia Beach, VA (February 14 - 15) - early bird rate

Call for Abstracts - ICWMM (February 28 & March 1, 2018)

The use of unmanned aerial vehicles for urban flood modeling was examined by Zoe Jingyu Zhu, Albert Z. Jiang, Yang Xiang, Benjamin Baird and Edward...

Following the drought of 2006 and 2007, the Lower Colorado River Authority of Texas developed a medium-range forecast model to incorporate...

A case study of the Chicago River watershed was completed using both data-driven and physical models to simulate total nitrates. Naila Mahdi and...

CHI office 2017 winter holiday closure

PCSWMM + EPA SWMM5 Workshops in Columbus, OH (February 7 - 8)

Register to join us at ICWMM in Toronto, ON (Feb 28 - Mar 1, 2018) - early bird discount available

PCSWMM + EPA SWMM5 Workshop in San Jose (January 22 - 23) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Sao Paulo, Brazil (January 30 & 31) - early bird

PCSWMM + EPA SWMM5 Workshop in Oklahoma City, OK (January 17 - 18) - early bird rate

A new research project on stormwater retrofits at Exhibition Place in Toronto, Canada is now on OpenSWMM.

The need to provide adequate water quality control using best management practices (BMPs) requires accurate modeling to determine their ideal...

PCSWMM + EPA SWMM5 Workshop in Tampa, FL (January 10 - 11) - early bird rate

Call for Abstracts - ICWMM (February 28 & March 1, 2018)

Welcome to PCSWMM version 7.1! The new PCSWMM version supports alternative runoff methods, IDF tools, scripting and LandXML importing as well as other...

Wishing all the SWMM USERS a spook-tacular Halloween.

PCSWMM + EPA SWMM5 Workshop in Vancouver, BC (December 13 - 14) - early bird rate

PCSWMM + EPA SWMM5 Workshop in San Diego, CA (December 6 - 7) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Guelph, ON (December 6 - 7) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Atlanta, GA (November 29 - November 30) - early bird rate

The OpenSWMM website now links to the SWMM users and reference manuals as well as other reference documentation making it easier for you to find...

PCSWMM + EPA SWMM5 Workshop in Cincinnati, OH (November 15 - 16) - early bird rate

PCSWMM + EPA SWMM5 Workshops in Johannesburg, SA (October 17 - 19)

In version 7.1 of PCSWMM, we will be releasing some significant new features including additional runoff methods such as the rational method. To...

PCSWMM + EPA SWMM5 Workshop in Sao Paulo (October 25 - 26) - early bird rate

We're working on a new tool to import LandXML files into SWMM5 projects. This tool will enable modelers to bring their AutoCAD drawings and Civil 3D...

PCSWMM + EPA SWMM5 Workshop in Milwaukee, WI (November 1 - 2) - early bird rate

We're working on a new tool for scripting in PCSWMM that supports any number of scripts to call various functions. Functions will include setting up...

PCSWMM + EPA SWMM5 Workshop in Halifax, NS (October 25 - 26) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Markham, ON (October 18 - 19) - early bird rate

PCSWMM + EPA SWMM5 Workshops in Johannesburg, South Africa (October 17-19)

PCSWMM + EPA SWMM5 Workshop in Detroit, MI (October 4 - 5) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Boston, MA (September 21 - 22) - early bird rate

PCSWMM + EPA SWMM5 Workshop in Guelph, ON (September 13 - 14)

International Conference on Water Management Modeling in Toronto, ON (February 28 & March 1) - First call for abstracts

PCSWMM + EPA SWMM5 Workshop in Fort Collins, CO (September 6 - 7)

PCSWMM + EPA SWMM5 Workshop in Calgary, AB (August 23 - 24)

PCSWMM + EPA SWMM5 Workshop in Windsor, ON (August 16 & 17)

PCSWMM + EPA SWMM5 Workshop in Minneapolis, MN (July 26 - 27)

PCSWMM + EPA SWMM5 Workshop in Regina, SK (July 19 - 20)

Our latest JWMM paper by Masson (Centre de Recherche et de Développement en Science du Sol, Economie, Environnement, Aménagement), Lefer (Université...

For those interested in GIS and water quality, be sure to read the latest JWMM paper by Shwesin Koko, Ranjna Jindal, and Romanee Thongdara from...

Check out the latest JWMM paper on stormwater modeling for solar farms by Thomas Barnard and James Barbis (Amec Foster Wheeler) and Mohamed Agnaou...

PCSWMM + EPA SWMM5 Workshop in Cleveland, OH (June 28 & 29)

PCSWMM/SWMM5 2-day training workshop in Lethbridge, AB (June 8 & 9)

PCSWMM/SWMM5 2-day training workshop in Winnipeg, MB (June 7 & 8)

PCSWMM/SWMM5 3-day training workshop in Cape Town, South Africa (June 6 - 8)

PCSWMM/SWMM5 2-day training workshop in Salt Lake City, UT (May 17 & 18)

PCSWMM/SWMM5 2-day training workshop in Edmonton, AB (May 17 & 18)

TALLER AVANZADO DE EPA SWMM5 Y PCSWMM in Mexico City (Abril 27 & 28)

Source control techniques called Water Sensitive Urban Design (WSUD) are increasingly being endorsed and adopted for managing stormwater in urbanizing...

Although LID-controls are still a fairly recent addition to SWMM, they have undergone several updates in the last years. Interested? Find out more in...

PCSWMM/SWMM5 2-day training workshop in Ottawa, ON (May 3 & 4)

PCSWMM/SWMM5 2-day training workshop in Seattle, WA (April 19 & 20)

PCSWMM/SWMM5 2-day training workshop in Nashville, TN (April 26 & 27)

In Zimbabwe, the rapid growth of urban areas has affected the quality of surface water due to overexploitation of the resource and improper waste...

Confronted with an array of water management-related challenges, Canadian municipalities are finding solutions by integrating initiatives for...

PCSWMM/SWMM5 2-day training workshop in Guelph, ON (April 19 & 20)

International Conference on Water Management Modeling (ICWMM) in Toronto, ON (March 1 & 2) - Last chance to register

Adequate sanitation is of global concern, and for Cha-Am, Thailand, it's a major priority due to its extensive oceanfront beach area. To learn more...

Many software packages calculate calibration statistics, but most are neither freely available nor open source. This reality has led researchers...

With urbanization being an ongoing trend in virtually all nations, resultant flooding problems from increased impermeable surface areas have...

Prediction of precipitation variability and its influence on the hydrological cycle and water quality is an increasingly active area in hydrological...

PCSWMM/SWMM5 2-day training workshop in Houston, TX (March 29 & 30)

Want to explore the development and calibration of a dual drainage model designed for the Cooksville Creek Watershed? Take a peek at the new JWMM...

Knowing the distribution of pollutants associated with different sized stormwater particles allows for more accurate determinations of their sources,...

International Conference on Water Management Modeling (ICWMM) in Toronto, ON (March 1 & 2) - Register before price increase

Stormwater runoff is a leading contributor to water quality and aquatic life habitat impairments in New England surface waters. Jamie Houle from UNH...

The analyses of particle size distributions of stormwater runoff plays a key role in understanding the pollutant characteristics of a specific site...

PCSWMM/SWMM5 2-day training workshop in Tampa, FL (March 15 & 16)

In the design of sewer systems, there is typically little attention paid to air movement - yet air movement is one of the determining factors in odour...

International Conference on Water Management Modeling (ICWMM) in Toronto, ON (March 1 & 2) - Final call for abstracts

PCSWMM/SWMM5 3-day training workshop in Durban, South Africa (March 14 - 16)

With the availability of long-term continuous flow meter and rainfall data (and faster computers and software) event-based rainfall-runoff models can...

PCSWMM/SWMM5 2-day training workshop in Toronto, ON (February 27 & 28)

Accurately predicting water quality in river systems is critical to enabling decision makers to respond more quickly to emergencies such as oil spills...

CHI office 2016 holiday quiet period

Large rainfall events such as tropical storms and hurricanes leave Florida's St. Johns River susceptible to flooding. In search of a solution,...

PCSWMM/SWMM5 2-day training workshop in Virginia Beach, VA (February 8 & 9)

International Conference on Water Management Modeling (ICWMM) in Toronto, ON (March 1 & 2) - Call for abstracts

Wetlands in Southern Ontario are experiencing degradation from urban development. In response, Caroline Charbonneau from Walter Fedy and Andrea...

International Conference on Water Management Modeling in Toronto, ON (March 1 & 2) - Register today for early bird

"The environmental and societal benefits of urban green space have long been recognized, but such land use often becomes a secondary consideration in...

Have you read the new JWMM paper titled Modeling of Transient Pneumatic Events in a Combined Sewer Overflow Storage Tunnel System by Peter Klaver and...

PCSWMM/SWMM5 2-day training workshop in Las Vegas, NV (January 25 & 26)

A new paper has just been published in the JWMM: Assessing the Impact of Variations in Hydrologic, Hydraulic and Hydrometeorological Controls on...

PCSWMM/SWMM5 2-day training workshop in San Francisco, CA (January 18 & 19)

Are you intrigued by the tool that was developed to enable efficient sensitivity analysis and calibration study for steady state and transient models?...

International Conference on Water Management Modeling (ICWMM) in Toronto, ON (March 1 & 2) - Submit your abstract

Have you read the brand new JWMM paper assessing SWMM 5 hydrologic parameter benefits for model calibration by Justin Siegrist, Mark Pribak and David...

Bill James, Founder of CHI, and Harald von Langsdorff, President of F. von Langsdorff Licensing Limited, have published a new paper in the Journal of...

PCSWMM/SWMM5 2-day training workshop in Guelph, ON (November 30 & 1)

Sakshi Saini and Amanjot Singh with Credit Valley Conservation in Mississauga, Ontario are digging deep into the modeling of low impact development...

PCSWMM/SWMM5 2-day training workshop in Edmonton, AB (November 3 & 4)

PCSWMM/SWMM5 3-day training workshop in Johannesburg, South Africa (October 4 - 6)

Interested in stormwater collection systems? Undergraduate students Subin Geevarghese, Noorudheen A.P. and Kadhirvel K. from Anna University are. In...

PCSWMM/SWMM5 2-day training workshop in Markham, ON (October 12 & 13)

PCSWMM/SWMM5 2-day training workshop in Portland, OR (October 19 & 20)

PCSWMM/SWMM5 2-day training workshop in Ann Arbor, MI (October 12 & 13)

PCSWMM/SWMM5 2-day training workshop in Thunder Bay, ON (October 5 & 6)

PCSWMM/SWMM5 2-day training workshop in Burnaby, BC (September 28 & 29)

Interested in an integrated EPA SWMM model for calculating the pollutant removal efficiency of low impact development practices? Check out the...

PCSWMM/SWMM5 2-day training workshop in Boston, MA (September 15 & 16)

PCSWMM/SWMM5 2-day training workshop in Guelph, ON (September 14 & 15)

PCSWMM/SWMM5 2-day training workshop in Raleigh, NC (September 14 & 15)

New OpenSWMM Research Project on a methodology for linking 2D overland flow models with the sewer network model SWMM 5.1 based on dynamic link...

International Conference on Water Management Modeling (ICWMM) in Toronto, ON (March 1 & 2) - Call for Abstracts

PCSWMM/SWMM5 2-day training workshop in Halifax, NS (September 7 & 8)

New OpenSWMM Research Project: Utilizing GIS in the Development of Detailed Distribution Urban Drainage Models by Masters student Zakia Alam Raihan,...

Are you interested in understanding the relationship between urban best management practices and ecosystem services? Check out this new OpenSWMM...

An interesting new OpenSWMM Research Project has been published on integrated sensing and prediction of urban water for sustainable cities by...

PCSWMM/SWMM5 2-day training workshop in Regina, SK (August 10 & 11)

Interested in the impact roadway runoff has on a headwater tributary of the Cahaba River in Alabama? Graduate Research Assistant Catherine Spencer and...

PCSWMM/SWMM5 2-day training workshop in Windsor, ON (August 3 & 4)

PCSWMM/SWMM5 2-day training workshop in Houston, TX (August 3 & 4)

PCSWMM/SWMM5 2-day training workshop in Vancouver, BC (July 27 & 28)

PCSWMM/SWMM5 2-day training workshop in Palo Alto, CA (July 13 & 14)

PCSWMM/SWMM5 3-day training workshop in Cape Town, South Africa (May 31 - June 2)

PCSWMM/SWMM5 2-day training workshop in Fort Collins, CO (June 22 & 23)

PCSWMM/SWMM5 2-day training workshop in Chicago, IL (June 1 & 2)

PCSWMM/SWMM5 2-day training workshop in Atlanta, GA (May 25 & 26)

PCSWMM/SWMM5 2-day training workshop in Guelph, ON (May 4 & 5)

PCSWMM/SWMM5 2-day training workshop in San Diego, CA (May 4 & 5)

PCSWMM/SWMM5 2-day training workshop in Seattle, WA (April 27 & 28)

PCSWMM/SWMM5 2-day training workshop in Nashville, TN (April 20 & 21)

Brand new publication: High Resolution Flash Flood Forecasting for the Dallas-Fort Worth Metroplex by Hamideh Habibi, Arezoo Rafieei Nasab, Amir...

PCSWMM/SWMM5 2-day training workshop in Richmond, VA (April 20 & 21)

Interesting new SWMM paper: Comparison of Three Methodologies for Quasi-2D River Flood Modeling with SWMM5 by John Beck.

PCSWMM/SWMM5 2-day training workshop in Ottawa, ON (April 13 & 14)

ICWMM - Toronto, ON (February 24 & 25) - Final reminder to register!

PCSWMM/SWMM5 3-day training workshop in Durban, (March 8 - 10)

PCSWMM/SWMM5 2-day training workshop in Hamilton, ON (March 30 & 31)

International Conference on Water Management Modeling in Toronto, ON (February 24 & 25) - Register before late fee starts

PCSWMM/SWMM5 2-day training workshop in Calgary, AB (March 9 & 10)

PCSWMM/SWMM5 3-day training workshop in Durban, South Africa (March 8 - 10)

PCSWMM/SWMM5 2-day training workshop in Fort Lauderdale, FL (March 2 & 3)

International Conference on Water Management Modeling in Toronto, ON (February 24 & 25) - Last call for abstracts

PCSWMM/SWMM5 2-day training workshop in Toronto, ON (February 22 & 23)

Happy Holidays from CHI - office quiet period

PCSWMM/SWMM5 2-day training workshop in Chattanooga, TN (February 3 & 4)

International Conference on Water Management Modeling in Toronto, ON (February 24 & 25)

PCSWMM/SWMM5 2-day training workshop in San Francisco, CA (January 20 & 21)

International Conference on Water Management Modeling - Call for Abstracts

PCSWMM/SWMM5 2-day training workshop in Pittsburgh, PA (December 9 & 10)

PCSWMM 6.1 is here, and it's packed with unseen capabilities and improvements that will save you time and make your job easier.

PCSWMM/SWMM5 2-day training workshop in Guelph, ON (December 2 & 3)

PCSWMM/SWMM5 2-day training workshop in Columbus, OH (November 18 & 19)

PCSWMM/SWMM5 3-day training workshop in Johannesburg, South Africa (October 27 - 29)

PCSWMM/SWMM5 2-day training workshop in Edmonton, AB (November 4 & 5)

PCSWMM/SWMM5 2-day training workshop in Portland, OR (October 21 & 22)

PCSWMM/SWMM5 3-day training workshop in Johannesburg, (October 27 - 29)

PCSWMM/SWMM5 2-day training workshop in Oshawa, ON (October 14 & 15)

PCSWMM/SWMM5 2-day training workshop in Ann Arbor, MI (October 8 & 9)

PCSWMM/SWMM5 2-day training workshop in Burnaby, BC (September 30 & October 1)

PCSWMM 6.0 has arrived! And it comes fully stocked with new features and advancements to improve workflow and streamline model development and...

PCSWMM/SWMM5 2-day training workshop in Boston, MA (September 24 & 25)

PCSWMM/SWMM5 3-day training workshop in Cape Town, (September 15 - 17)

PCSWMM/SWMM5 2-day training workshop in Raleigh, NC (September 16 & 17)

PCSWMM/SWMM5 2-day training workshop in Guelph, ON (September 9 & 10)

PCSWMM/SWMM5 2-day training workshop in Halifax, NS (September 2 & 3)

PCSWMM/SWMM5 3-day training workshop in Cape Town, (September 15 - 17)

International Conference on Water Management Modeling in Toronto, ON (February 24 & 25)

PCSWMM/SWMM5 2-day training workshop in Regina, SK (August 12 & 13)

PCSWMM/SWMM5 2-day training workshop in Austin, TX (August 5 & 6)

PCSWMM/SWMM5 2-day training workshop in Windsor, ON (August 5 & 6)

PCSWMM/SWMM5 2-day training workshop in Vancouver, BC (July 29 & 30)

PCSWMM/SWMM5 2-day training workshop in Palo Alto, CA (July 15 & 16)

PCSWMM/SWMM5 2-day training workshop in Johannesburg, (June 3 & 4)

PCSWMM/SWMM5 2-day training workshop in Fort Collins, CO (June 24 & 25)

PCSWMM/SWMM5 2-day training workshop in Chicago, IL (June 3 & 4)

PCSWMM/SWMM5 2-day training workshop in Atlanta, GA (May 27 & 28)

PCSWMM/SWMM5 2-day training workshop in Winnipeg, MB (May 13 & 14)

Advanced Surface Water Modelling for Mines with EPA SWMM5 and PCSWMM 2-day training (June 3 &4)

PCSWMM/SWMM5 2-day training workshop in Guelph, ON (May 6 & 7, 2015)

PCSWMM/SWMM5 2-day training workshop in Minneapolis, MN (May 6 & 7)

PCSWMM/SWMM5 2-day training workshop in Richmond, VA (April 22 & 23)

PCSWMM/SWMM5 2-day training workshop in Ottawa, ON (April 15 & 16)

PCSWMM/SWMM5 2-day training workshop in Quebec on March 9 & 10 and May 13 & 14

PCSWMM/SWMM5 2-day training workshop in Cincinnati, OH (April 8 & 9)

PCSWMM/SWMM5 2-day training workshop in Barrie, ON (April 1 & 2)

PCSWMM/SWMM5 2-day training workshop in Seattle, WA (April 1 & 2)

International Conference on Water Management Modeling in Toronto, ON (February 25 & 26)

PCSWMM/SWMM5 2-day training workshop in Calgary, AB (March 11 & 12)

PCSWMM/SWMM5 2-day training workshop in Fort Lauderdale, FL (March 4 & 5)

Register 4 weeks before any of our regular scheduled workshops and receive a 10% discount!

Register today to ensure a spot at the International Conference on Water Management Modeling

CHI has just released the latest version of PCSWMM with many powerful new features.

Congratulations to Mark Randall (CHI) for winning the Best Paper Prize at the recent Urban Drainage Group conference in Nottingham, UK

CHI's equation T-shirts are again available for purchase! To purchase your t-shirt please click here and place your order. Available from S-XL, navy...

CHI is pleased to announce the latest version of PCSWMM (version 5.4).

Want to upgrade or purchase PCSWMM Professional 2D, come visit our licensing and pricing

The newest upgrade for PCSWMM was released May 31, 2013 for both PCSWMM Professional and Professional 2D

The CHI University Grant Program is an easy way for full time academics …

....all models are wrong, so honest modelers report their uncertainty first and foremost....

Rob James spoke about "Real-Time Flood Forecasting System for Three Urban Drainage Areas in Southern Ontario" at the Professional Engineers of Ontario...

From the Roman aqueducts to the latest research on what happens when you turn the tap, it’s an hour on water.

RELEASE DATE: PCSWMM 2011 2D is scheduled to be released in late 2011.

October 15, 2010 - PCSWMM 2011 is now available and new features include improved transferring of graphical data…

I am very excited to introduce the documentation panel, one of the newest features of PCSWMM.

Viewing and animating multiple profiles/HGLs simultaneously can aid in the analysis and presentation of many modeling projects.

In version 3.9 of PCSWMM 2010 Standard and Professional, we have release some significant new features which are documented in other posts.

One of the more common errors we encounter in the technical support department for PCSWMM is problems with SWMM5 input time series having its data out...

This update adds some exciting new tools, as well as many incremental improvements to the software which are designed to increase workflow efficiency,...

CHI has introduced an advanced easy-to-use tool for importing river models from HEC-RAS (version 4.0 and earlier) into PCSWMM for modeling with the...

In the latest version of PCSWMM 2009 (ver. 3.4), we have rolled out a compatibility mode for running earlier versions of the SWMM engine.

New in PCSWMM 2009 version 3.4 is an anti-aliasing feature that improves map rendering of all layers (raster and vector).

With the release of PCSWMM 2009 version 3.4, we have made a huge leap forward in GIS capabilities.

A couple of recent technical support questions inspired this post on selecting reasonable values for the various user-defined time steps required by...

In the near future, we will be rolling out a significant expansion of our GIS engine.

I'm pleased to report the general availability of PCSWMM 2009 Professional, our flagship software for advanced watershed, stormwater and wastewater...