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EPA’s Water Security Modeling and Simulation Research (SUMMARY)
A software framework for assessing the resilience of drinking water systems to disasters with an example earthquake case study (JOURNAL)
Water Security Toolkit User Manual: Version 1.3 (DATA)
User manual: Data Product/Software
Modeling Fate and Transport of Arsenic in a Chlorinated Distribution System (JOURNAL)
Better Water Demand and Pipe Description Improve the Distribution Network Modeling Results (PAPER IN NON-EPA PROCEEDINGS)
Distribution system modeling simplifies pipe network in skeletonization and simulates the flow and water quality by using generalized water demand patterns. While widely used, the approach has not been examined fully on how it impacts the modeling fidelity. This study intends to ...
Water Network Tool for Resilience (WNTR) User Manual (PUBLISHED REPORT)
The Water Network Tool for Resilience (WNTR) is a new Python package designed to simulate and analyze resilience of water distribution networks to a variety of disaster scenarios. WNTR can help water utilities to explore the capacity of their systems to handle disasters and gui...
What is EPA Planning for EPANET? (PRESENTATION)
Presentation at the ASCE Visioning Summit, April 3-4, 2018
APPLICATION OF EPANET TO UNDERSTAND LEAD RELEASE IN PREMISE PLUMBING (PRESENTATION)
This presentation describes the factors affecting lead concentration in tap water using an EPANET hydraulic model for a simplified home model, a realistic home model, and EPA's experimental home plumbing system.
Mixing at double-Tee junctions with unequal pipe sizes in water distribution systems (JOURNAL)
Pipe flow mixing with various solute concentrations and flow rates at pipe junctions is investigated. The degree of mixing affects the spread of contaminants in a water distribution system. Many studies have been conducted on the mixing at the cross junctions. Yet a few have focu...
Using WNTR to Model Water Distribution System Resilience (PRESENTATION)
The Water Network Tool for Resilience (WNTR) is a new open source Python package developed by the U.S. Environmental Protection Agency and Sandia National Laboratories to model and evaluate resilience of water distribution systems. WNTR can be used to simulate a wide range of di...
Using SCADA Data, Field Studies, and Real-Time Modeling to Calibrate Flint's Hydraulic Model (PRESENTATION)
EPA has been providing technical assistance to the City of Flint and the State of Michigan in response to the drinking water lead contamination incident. Responders quickly recognized the need for a water distribution system hydraulic model to provide insight on flow patterns an...
Water Quality Modeling in the Dead End Sections of Drinking Water Distribution Networks -journal article (JOURNAL)
Dead-end sections of drinking water distribution networks are known to be problematic zones in terms of water quality degradation. Extended residence time due to water stagnation leads to rapid reduction of disinfectant residuals allowing the regrowth of microbial pathogens. Wate...
RTX:LINK – AN EPANET-RTX APPLICATION FOR WATER UTILITIES TO IMPLEMENT REAL-TIME ANALYTICS (SUMMARY)
Enhancements to the EPANET-RTX (Real-Time Analytics) Software Libraries-2015 (SUMMARY)
Technical brief and software
Optimal Monitoring Location Selection for Water Quality Issues (PAPER IN NON-EPA PROCEEDINGS)
Development of a Probabilistic Timing Model for the Ingestion of Tap Water (JOURNAL)
Systems Measures of Water Distribution System Resilience (PUBLISHED REPORT)
Water Utility Case Study of Real-Time Network Hydraulic and Water Quality Modeling Using EPANET-RTX Libraries (PUBLISHED REPORT)
EPANET Extended to Include Multi-Species Modeling (SUMMARY)
Monochloramine Cometabolism by Ammonia-Oxidizing Bacteria. Report #4341 (EXTRAMURAL DOCUMENT)
Chloramine use is widespread in United States (US) drinking water distribution systems as a secondary disinfectant. In a recent survey of water utilities, 30% of the respondents used chloramines to maintain distribution system residual (AWWA Water Quality and Technology Division...
How Accurate Is A Hydraulic Model? (PAPER IN NON-EPA PROCEEDINGS)
Cometabolism of Monochloramine by Distribution System Relevant Mixed Culture Nitrifiers (PRESENTATION)
Monochloramine (NH2Cl) is increasingly used as a residual disinfectant. A major problem related to NH2Cl is nitrification in distribution systems, leading to rapid NH2Cl residual loss. Ammonia-oxidizing bacteria (AOB), which oxidize ammonia (NH3) to nitrite, can cometabolize chem...
EPANET Multi-Species Extension Software and User’s Manual (DATA)
Software and User's Manual
Modeling Reaction and Transport of Multiple Species in Water Distribution Systems (JOURNAL)
Formulation of Chlorine and Decontamination Booster Station Problem (PAPER IN NON-EPA PROCEEDINGS)