Science Inventory

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Modeling Water Age in Premise Plumbing Systems

EPANET, EPANET-MSX and the Water Network Tool for Resilience (WNTR) are powerful modeling tools for water distribution system modeling. This presentation highlights a range of work associated with these tools to provide real-world examples of how EPANET and associated tools are u...

The use of EPANET for modeling water age with specific discussions to highlight why determining water age is important, how to interpret results, and provides some best practices using EPANET. The results should be useful to anyone interested in water quality modeling using EPANE...

Resilience analysis of critical infrastructure is inherently complex and requires the integration of diverse data and disparate models in a cohesive analysis to produce meaningful decision support.  In this presentation, we discuss recent updates to the Water Network Tool for Res...

The U.S. Environmental Protection Agency and Sandia National Laboratories have developed the Water Network Tool for Resilience (WNTR) to quantify resilience of drinking water distribution systems. WNTR is a Python package designed to simulate disaster scenarios and analyze impact...

Drinking water utilities face multiple challenges, including aging infrastructure, water quality concerns, pipe breaks, natural disasters, environmental emergencies, and terrorist attacks. All of these have the potential to disrupt service to customers and damage critical infrast...

Upgrade of the tool to work with EPANET2.2

This presentation is an overview of ORD's drinking water, stormwater, wastewater and water reuse models that are being used to design, improve, optimize and enhance the resilience of water systems.  This is being presented by Regan Murray, Caleb Buahin, Terra Haxton and Jeff...

The delivery of safe, potable water to communities is the primary objective of drinking water utilities. However, the quality of the water can deteriorate as it is transported from the treatment plant through the distribution system to the customers due to interactions with the p...

This presentation provides a general overview of EPA's modeling tools and associated water quality sensor research. Tool functionality is described and how they interact or are informed by sensor research will be discussed during the presentation. Tools include EPANET, EPANET-MSX...

Drinking water utilities are vulnerable to both human-caused and natural disasters that can impact the system infrastructure and the delivery of potable water to consumers. Resilience analysis can help utilities identify high-risk areas in their system and understand how to bette...

This study illustrates the usage of multi-species modeling tool to analyze water quality and evaluate water safety within drinking water distribution system.

The two Category-5 hurricanes that impacted the U.S. Virgin Islands in 2017 exposed critical infrastructure vulnerabilities that needs to be addressed. While the water utility has first-hand knowledge about how the hurricanes impacted their systems, the use of modeling and simula...

EPANET-MSX enables the advanced water quality modeling of reactions that involve multiple reacting species. It will help researchers and practitioners better understand and analyze the water quality problems within drinking water distribution system. This manual documents the met...

Drinking water utilities are vulnerable to both human-caused and natural disasters that can impact the system infrastructure and the delivery of potable water to consumers. Resilience analysis can help utilities identify high-risk areas in their system and understand how to bette...

Our nation's water infrastructure is in need of billions of dollars of repairs, upgrades, and replacements. This presentation provides an overview of recent EPA Office of Research and Development research on the topic of resilient water infrastructure, including free models and t...

Many reactions that occur in water distribution systems cannot be completely described by the single species reactions available within EPANET, such as disinfectant byproduct (DBP) formation and associated disinfectant loss. To address this limitation, EPANET-MSX (Multi Species e...

Improve concentration modeling within premise plumbing systems to understand fate and transport/ Also related to improved premise plumbing model.

The U.S. Environmental Protection Agency and Sandia National Laboratories have developed the Water Network Tool for Resilience (WNTR) to quantify resilience of drinking water distribution systems. WNTR is a Python package designed to simulate disaster scenarios and analyze impact...

This chapter introduces the Water Network Tool for Resilience (WNTR) and how it can be used to evaluate drinking water distribution system (WDS) resilience. At the end of this chapter, the reader will be able to install and run WNTR, set up and run various disaster scenario simul...

EPANET has been used widely to model hydraulics and water quality changes within drinking water distribution systems. One limitation of the EPANET water quality analysis was that it tracks the transport of only one soluble substance. A decade ago, EPA released an extension of EPA...

A fully Lagrangian method to simulate the advection, dispersion and reaction of a single constituent within a pipe network is presented. Fixed computational grids required in Eulerian and Eulerian-Lagrangian methods are not needed in the fully Lagrangian method and the size of th...

This workshop on EPANET will be structured as two parts.  Part 1 will provide an overview and introduction to EPANET.  Part 2 will consist of presenting and discussing four example  EPANET applications that participants can follow to get familiar with and use EPANET.  The four ap...

The Water Network Tool for Resilience (WNTR) was first released in 2016. WNTR uses the methods in the EPANET toolkit API to simulate and analyze resilience of water distribution systems. WNTR has been recently updated to include new features designed to improve resilience analysi...

Water distribution systems are among the most critical civil infrastructure and must be prepared to withstand or quickly recover from any disruptive incident. With increasing threats to drinking water systems, including natural disasters, water shortages, power outages, bioterror...