<< Previous

Next >>

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...

To evaluate the effectiveness of dispersed stormwater control measures (SCMs) it is important to consider groundwater-surface water interactions and their consequences for stream hydrologic responses relevant to channel geomorphic stabilty and ecology. A process-based block-conne...

We combined an existing bioenergetics-based model of juvenile Atlantic sturgeon growth with an empirical survival model to predict the effect of dissolved oxygen (DO) and water temperature on instantaneous potential production of juvenile Atlantic sturgeon, an oxygen-sensitive an...

The developmental potential of human pluripotent stem cells (hPSCs) in culture closely resembles the &lsquo;epiblast&rsquo; during gastrulation. ToxCast provides in vitro bioactivity data on over 1000 chemicals from a hPSC assay that predicts developmental toxicity with ~80% bala...

Wildfire activity in western US forests has increased over the last two decades, resulting in increased solids and nutrient loadings to streams, and in some cases threatening drinking water supplies. These increases are attributed to rainfall events and the distribution of water ...

Hydrologic modifications in urban ecosystems impact water quality via soil compaction, impervious surface cover, drainage, and channelization. &nbsp;Urban stream restoration strategies that are designed to regain lost ecosystem function such as nutrient uptake may have unintended...

New chemicals are introduced into commerce regularly, and existing chemicals are sometimes repurposed for new uses.&nbsp; In both cases the chemicals may present health risks to occupational workers that can be evaluated via exposure and risk assessments.&nbsp; In addition, chemi...

Magnitude of atmospheric turbulence, a key driver of several processes that contribute to aerosol (i.e., particle) deposition, is typically underrepresented in current models. Various formulations have been developed to model particle dry deposition; all these formulations mostly...

Computational screening for potentially bioactive molecules using advanced molecular modeling approaches including molecular docking and molecular dynamic simulation is mainstream in certain fields like drug discovery. Significant advances in computationally predicting protein st...

Surface water quality models are critically important tools for managing our nation's surface waters. At the U.S. Environmental Protection Agency, quantitative models are used to help local communities and environmental managers better understand how surface waters change in resp...

This paper compared simulation results from different model constructions of a Storm Water Management Model (SWMM) after radiological contamination from a hypothetical dirty bomb scenario. The model constructions included a utility-provided combined sewer stormwater model, a high...

Modeling large-scale hydrological impacts brought about by site-level green and gray stormwater remediation actions is difficult because urbanized areas are extremely complex dynamic landscapes that include engineered features that, by design, expedite urban runoff to streams, ri...

Lake Erie is threatened by eutrophication and harmful algal blooms due to excess nutrient loading from agricultural sources. To reduce nutrient loading to Lake Erie, widespread adoption of agricultural conservation practices (ACPs) has been proposed. However, identifying appropri...

This presentation highlights data collection considerations for us in complex simulation models. Case studies are presented based on SSWR StRAP3 and StRAP4 research, emphasizing application of continuous and survey based monitoring designs to coastal ecosystems. It is meant for w...

Metabolic similarity is a key consideration in read-across but approaches to characterise and quantify the contribution metabolism plays are still evolving. A major challenge lies in the lack of a standardized database of human xenobiotic metabolism pathways for environmental che...

This presentation highlights challenges and strategies of modeling eutrophication dynamics using complex simulation models. Case studies are presented using ORD's Coastal Generalized Ecosystem Model (CGEM), emphasizing results from the northern Gulf of Mexico and northern Gulf es...

Abstract and eventual presentation to be given at the 2023 World Congress on Alternatives, held in Niagara Falls Canada August 27-31, 2023. Topic area is modeling life stage TK variability to understand which children/populations may be prone to higher systemic concentrations and...

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...

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

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...

Visualizing Ecosystem Land Management Assessments (VELMA) is a spatially explicit process-based ecohydrological model used to assess potential watershed conditions. As part of the Puget Sound Integrated Modeling Framework connecting terrestrial, freshwater, marine, and social sys...

Visualizing Ecosystem Land Management Assessments (VELMA) is an ecohydrology model being leveraged in a recently initiated effort to identify practical, proactive watershed restoration strategies that can be initiated now to lessen long-term impacts of climate change on Puget Sou...

The normal probability density function (PDF) is widely used in parameter estimation in the modeling of dynamic systems. The values of random variables that obey the normal PDF are distributed at assumed infinite intervals. However, in practice, these random variables are usually...

Fairbanks, Alaska is a nonattainment area for the 24-hour PM2.5 National Ambient Air Quality Standards (NAAQS). Violations of the NAAQS typically occur in winter when the cold conditions are associated with strong temperature inversions and air stagnation. This leads to a buildup...

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.&nbsp; This is being presented by Regan Murray, Caleb Buahin, Terra Haxton and Jeff...