Refine by
Plume Modeling Articles & Analysis
96 articles found
Groundwater contamination is often framed in terms of what can be removed, degraded, or naturally attenuated over time. But chloride behaves differently. Unlike many organic contaminants, chloride does not break down, bind easily to soils, or dissipate quickly. Once introduced into an aquifer, it can persist for decades—moving with groundwater flow and spreading far beyond its original ...
ByLiORA
The National Park Rapid Plume Assessment showcases the efficiency of LiORA Trends real-time modeling, utilizing 8 sensors to deliver critical insights in a fraction of the time. Get insights on your plume immediately rather than years or ...
ByLiORA
When integrated into fixed methane monitoring systems, the WSD-05M enables gas plume modeling and leak source localization in on-site environments by combining real-time wind data with methane concentration measurements. ...
Both the AirSentry FTIR and UV Sentry data streams are readily integrated into plume dispersion models for source location and downstream impact. Integrated DQI eases QA when streaming data to the public. ...
Newly available global population data allowed the team to model the way wastewater plumes enter the ocean and affect ...
In Q3 and Q4 of 2019 we were able to quadruple the amount of sites we use when doing comparative remediation site modeling, up to well over 75,000 across the United States. This data was compiled, normalized, and annotated by our team of data curators who take information from state DEQ databases, voluntary remediation programs, underground storage tank programs, PDF downloads, ...
ByAzimuth1
Micro Pulse LiDAR remote sensing data are used to calculate a highly accurate Planetary Boundary Layer (PBL) height to improve plume models that help assess emissions sources. Poor air quality is a growing health issue that has a negative impact on the quality of life for millions of people. ...
The data were used to calculate mass flux and mass discharge to develop a high density conceptual site model, evaluate source and plume strength, and calculate injectate loadings. ...
Checking for data inconsistencies Loading 3,900 samples Loading 130,000 laboratory results Migrating stratigraphy data from the Modflow model to ArcGIS Migrating site data to ArcScene to prep the data in 3D Bringing boring and groundwater impact data for constituents of concern (COC) into Entervol for modeling in three dimensions Plotting groundwater ...
Approach To efficiently manage such a large dataset, and to enable efficient production of the required tables, graphs, 3D models, GIS, and other outputs required for conceptual model development, the contaminated site data management system ESDAT was employed. A rigorous conceptual model of the site and the degradation processes occurring was ...
The highest-priority remedial action objectives (RAOs) for Well 12A are to reduce risk from contaminated surface soil and achieve at least a 90% reduction in contaminant mass discharge from the source area (below and around the former recycling building known as the Time Oil Building) to the dissolved-phase contaminant plume. Other priorities are to achieve chemical-specific ...
The comparison of possible network configurations is performed on simulated experiments where a twin model is used to simulate observed data. An assimilation procedure based on the particle filter approach is run for each configuration of the network. Specifically, multiple realisations of segmented Gaussian plume models are computed, each with ...
The application of CALMET/CALPUFF modelling system is well known, and several validation tests were performed until now; however, most of them were based on experiments with a large compilation of surface and aloft meteorological measurements, not always available. Also, the use of an operational large smokestack as tracer source is not so usual. In this work, CALPUFF ...
Toxic load-based toxicity models have been increasingly applied to model the effects of atmospheric releases of hazardous materials. Although the majority of atmospheric transport and dispersion models predict only a ‘mean’ plume, real-world personnel are exposed to one of many possible individual realisations of a ...
We developed a fluctuating plume model able to evaluate all the higher order moments of concentration only requiring the knowledge of the first one. The simple algorithm used to calculate the meander centroid component is independent of the method used to obtain the mean concentration field and makes the computational time lower than most meandering ...
In this work, we present an offline alternative method based on the use of a detailed plume aerosol model combined to fluid trajectories calculated from 3D large–eddy simulations (LESs). ...
It has been observed that the toxic load model can better account for toxic effects from chemical exposures than Haber’s law. However, the toxic load model has been experimentally validated only for steady exposures. We compare four proposed extensions of the toxic load model to the case of time-varying exposures. We conclude that the choice of ...
An in-depth comparison of plume calculations from the Quick Urban and Industrial Complex (QUIC) dispersion model to street- and roof-level concentration measurements for a daytime and night time release taken during the Joint Urban 2003 field experiment held in downtown Oklahoma City is presented. A number of improvements to the empirical-diagnostic wind solver ...
In the literature, analytical models have been shown to be extremely useful for estimating the decay rates of coliform as fecal indicator microorganisms, providing reliable predictions of bathing conditions in coastal and continental waters. ...
In contamination events, the complex interactions among managers' operational decisions, consumers' water consumption choices, and the hydraulics and contaminant transport in the water distribution system may influence the contaminant plume so that a typical engineering model may not properly predict public health consequences. A complex adaptive ...