The JWMM has published its first paper for 2025: "Development of Appropriate Synthetic Design Storms for Small Catchments in Gauteng, South Africa" by...

The Journal of Water Management Modeling is happy to announce the publication of “Numerical Modeling of Water Flow in Permeable Friction Course...

Understanding the dynamic characteristics of the groundwater flow budget is crucial for effective water management.

"Investigation of Water Drainage Capability for Porous Asphalt Material with Varying Slope and Porosity Based on Laboratory Experiment" by Anh Tuan...

The Journal of Water Management Modeling has published the first paper of several from the SCNSU 2024 Conference held in Vietnam this past August.

The JWMM has published another paper! Visit www.

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.

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...

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,...

The Journal of Water Management Modeling @chijournal.

"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...

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...

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

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

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

"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...

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

"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...

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

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

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...

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

"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

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...

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...

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...

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...

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

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...

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...

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...

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...

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...

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,...

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...

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

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...

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...

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

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

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,...

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...

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...

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,...

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

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...

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...

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

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...

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

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...

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...

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.

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...

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

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...

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...

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...

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...

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

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...

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...

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,...

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...

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...

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

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

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

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

"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...

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

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

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...

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

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

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

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...

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...

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

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

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

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

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...