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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...

Background and Purpose: A virtual embryo may be conceptualized as a compendium of computational systems models that integrate biological systems information with chemical specific information to make predictions about developmental toxicity in a digital twin.  A challenge to...

Aquatic ecosystem responses to wildfire can vary widely depending on the characteristics of fire and the spatial context of where a fire takes place. Assessment of wildfire risk to aquatic ecosystems requires an understanding of sources of such variability (see Ebersole et al. th...

Impacts of multiple stressors on wildlife populations are challenging to evaluate given their heterogeneous distribution within the landscape as well as their unpredictable interactions. The ubiquity of some pesticides and anthropogenic contaminants results in potentially cryptic...

Across the Pacific Northwest late summer stream temperatures are increasing while stream flows are becoming extremely low.  Stream nutrient and contaminant loadings from diverse sources are also on the rise. These environmental shifts have direct impacts on aquatic systems a...

 Increased nutrient loading to coastal ecosystems has fueled a series of intertwined water quality processes that leads to low dissolved oxygen (DO) or hypoxia (DO ≤ 2 mg L-1) and reduced pH, which is also known as nutrient enhanced acidification. While the cumulative imp...

Anthropogenic nutrient loading has resulted in eutrophication and habitat degradation within estuaries. Study of eutrophication in estuaries has often focused on larger systems, while there has been increasing interest in understanding the governing processes in smaller systems. ...

Coho salmon (Oncorhynchus kisutch), are highly sensitive to  6PPD-quinone (6PPD-q), a transformation product of the ubiquitously used tire rubber antiozonant 6PPD and found in stormwater runoff [1, 2]. Details of the hydrological and biogeochemical processes controlling spat...

For about half-a-century, similarity profile functions have been the only option to model planetary boundary layer (PBL) processes in meteorological and air quality models. These functions represent boundary layer stability conditions so that PBL processes are realistically model...

A comprehensive understanding of the kinetics of solute transport in groundwater and soils is essential for predicting the spatial and temporal distribution of these contaminants. In this research, a novel approach is presented to solute transport that is founded on the temporall...

Eco-evolutionary dynamics result when interacting biological forces simultaneously produce demographic and genetic population responses. Eco-evolutionary simulators traditionally manage complexity by minimizing the influence of spatial pattern on process. However, such simplifica...

The U.S. Environmental Protection Agency’s (EPA) Exposure Forecasting (ExpoCast) project has developed high-throughput (HT) models for estimating population exposures to thousands of chemicals for use in chemical prioritization. Within the ExpoCast Systematic Empirical Eval...

Assessing the effectiveness and measuring the performance of fuel treatments and other wildfire risk mitigation efforts are challenging endeavors. Perhaps the most complicated is quantifying avoided impacts. In this study, we show how probabilistic counterfactual analysis can hel...

Eutrophication and nutrient related water quality issues are an increasing threat to coastal, estuarine, and freshwater ecosystems across the globe. Managers and policy makers commonly rely on complex simulation models to address water quality impacts and to predict outcomes from...

With the emergence of cloud computing technologies, many earth system modeling groups have explored cloud-based solutions for managing large modeling input and output datasets. At EPA large (100s of GB to 10s of TB) modeling datasets from the Community Multiscale Air Quality (CMA...

This presentation highlights challenges and strategies for applying mechanistic simulation models to decision making. Case studies are presented using ORD's Coastal Generalized Ecosystem Model (CGEM), emphasizing different results and applications from the northern Gulf of Mexico...

Storm surges and coastal flooding cause large-scale damage to communities and the environments of the Atlantic and Gulf coasts. Recent investigations on the genesis, tracks, intensity, and landing of Atlantic tropic cyclones, and their compounding floods with sea level rise all s...

Closure of the caudal neural tube is a critical event that occurs early in development, around day 27 in human gestation. Its failure underlies spina bifida and other neural tube defects (NTD), which are among the most prevalent human congenital malformations. Human and environme...

Background: Environmental exposures, like air pollutants, are often correlated with each other, and may also be correlated with factors that require analytic control, like social determinants of health, that may act as confounders. Performance of methods for analysis of correlate...

Determination of the Effective Dispersion Coefficient in One-Dimensional Advection-Dispersion model using Random Walk Particle Tracking Approach Feng Shang and Jonathan Burkhart To accurately model the transport of water quality constituents within a pipe network, the one dimensi...

Toxicological outcomes in vivo result from complex interactions among molecular, cellular and tissue-level damage responses which are difficult to recapitulate in vitro or extrapolate from data-based Machine Learning or molecular-level computer simulations. Mechani...

A cohort simulation model was developed to predict the growth and survival of Age-0 juvenile Atlantic sturgeon in the Delaware River based on water quality conditions in the river.  The model utilizes a bioenergetics model predicting daily instantaneous growth rate of juveni...

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

Upgrade of the tool to work with EPANET2.2

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...