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Records 1 to 25 of 31099 records about 'Water'

2024
A Bayesian spatiotemporal model evaluation of forecasting cyanobacterial harmful algal bloom events.
(PRESENTATION) [Presented : Jun 07, 2024]
The U.S. Harmful Algal Bloom and Hypoxia Research Control Act calls for robust approaches to forecasting cyanobacterial harmful algal blooms (cyanoHABs). Accurate forecasting technology could save local communities healthcare costs through the early detection of cyanoHABs and the...
A Narragansett Bay Mesocosm Experiment: Effects of Eelgrass Density on Greenhouse Gas Fluxes
(PRESENTATION) [Presented : Apr 20, 2024]
Seagrass beds provide key benefits, including playing a critical role in climate mitigation. We tested the effects of different eelgrass densities on greenhouse gas (GHG) fluxes at the water-atmosphere interface by creating six treatments (4 reps ea) with different shoot densitie...
A blank slate: revealing the eco-geomorphic dynamics of emergent reservoir landscapes using remote sensing data
(PRESENTATION) [Presented : Jun 06, 2024]
As the world's reservoirs experience drawdowns from reduced precipitation and increased water demand, expanses of sediment are being exposed and colonized by both native and non-native vegetation. Within Lake Powell, the second largest reservoir in the U.S., drought in the Colora...
A call for consistency and integration in global surface water estimates
(JOURNAL) [Published : Jan 16, 2024]
Global shifts in climatic conditions and anthropogenic disturbances are dramatically modifying the Earth’s ecosystem. Ensuring water security, availability, and quality within this context largely depends on how accurately we can map Global Surface Water Extents (GWSE). Map...
A cheminformatics workflow for higher-throughput modeling of chemical exposures from biosolids (SOT 2024)
(PRESENTATION) [Presented : Mar 14, 2024]
Background and Purpose Biosolids are treated sewage sludge produced as a byproduct of the wastewater treatment process, often applied to land or disposed of in landfills. Under the Clean Water Act, the US EPA Office of Water (OW) has the responsibility to protect human health and...
A fecal score approximation model for analysis of real-time quantitative PCR fecal source identification measurements
(JOURNAL) [Published : May 15, 2024]
Numerous qPCR-based methods are available to estimate the concentration of fecal pollution sources in surface waters. However, qPCR fecal source identification data sets often include a high proportion of non-detections (reactions failing to attain a prespecified minimal signal i...
A screening level risk assessment of metal and organic contaminants in the Everglades National Park, Biscayne National Park and Big Cypress National Preserve (South Florida, USA)
(PRESENTATION) [Presented : Mar 07, 2024]
South Florida is a subtropical environment with diverse ecological and human communities that rely on a complex water system undergoing the costliest restoration in U.S. history. Pesticide and metal input to the aquatic systems of South Florida can impact the capabilities of main...
A workflow for the detection of Vibrio spp. in a tropical estuarine environment via enrichment dependent high throughput sequencing and qPCR methods
(PRESENTATION) [Presented : Jun 17, 2024]
Identification of potential pathogens that present risks to human health in recreational waters is necessary to advance in-depth water quality assessments. Despite the application of PCR techniques for environmental pathogen detection, only limited information is usually availabl...
Adaptation Organon for Resilient Natural Resources.
(PRESENTATION) [Presented : May 14, 2024]
An ‘organon’ is a thought instrument or system of logic that unifies a body of scientific principles. The Adaptation Organon (AO) is an interactive, web-based instrument for considering climate change and other environmental information to inform adaption and improve ...
Advances in Plume Dispersion Modeling Using Emissions Data from an Unmanned Aircraft System
(PRESENTATION) [Presented : May 16, 2024]
An in situ oil burn plume was characterized to provide a unique aerial data set for development and calibration of near-source dispersion models. Seven in situ burns (ISBs) were conducted on a subset of a 1 ha artificial pond. The Alaska North Slope crude oil burn plume was sampl...
Advancing the Stormwater Management Model for the Digital Water Transformation
(PRESENTATION) [Presented : Mar 01, 2024]
While SWMM has arguably played a pivotal role in pollution control in collection systems since its introduction, traditional applications using the model have been relatively static. They typically involve calibrating and validating SWMM models with data collected and curated for...
Algal taxonomic data: Embracing new protocols and analyses.
(PRESENTATION) [Presented : Jun 02, 2024]
Taxonomic data are the foundation of bioassessment and much basic and applied research. Difficulty in morphological species identification, evolving and varying taxon concepts, and nomenclatural changes can lead to significant inconsistencies in taxonomic datasets across analysts...
An evaluation of properly operated NSF/ANSI-53 Pb certified drinking water filters in Benton Harbor, MI
(JOURNAL) [Published : Feb 01, 2024]
Communities across the United States and particularly in the Midwest continue to grapple with the complications associated with aging infrastructure. This includes the presence of lead (Pb)-bearing plumbing components such as lead service lines (LSLs), downstream galvanized iron ...
Analysis of Emissions from Methods to Improve Combustion Efficiency of In Situ Oil Burns
(PUBLISHED REPORT) [Published : Feb 02, 2024]
In-situ burning (ISB) is the controlled burning of oil spilled from a vessel or pipeline. There were multiple ISB events after the Deepwater Horizon oil spill on April 20, 2010, including 410 ISBs conducted by the Coast Guard [1]. Proponents of ISB suggest that it offers a rapid ...
Analysis of continuous stream temperature data from long-term monitoring sites in the Northeast
(PRESENTATION) [Presented : Feb 14, 2024]
The Regional Monitoring Networks (RMNs) are a collaborative, volunteer effort to collect comparable long-term monitoring data at targeted sites nationwide to detect changes over time. Six Northeast states have participated in the stream RMN since it was first piloted in the North...
Analysis of microcystins in alum water treatment sludges: holding times, temperatures, linearity of response, and sensitivity to pre-coagulation cell titers
(JOURNAL) [Published : May 09, 2024]
The ELISA assay is a potential tool to screen for dissolved or cell bound microcystins in drinking water treatment plant sludges.  In order to evaluate this potential more thoroughly, a series of experiments were performed to: (1) evaluate the impacts of storage times and te...
Anatoxin-a: formulation and stability in support of rodent studies
(PRESENTATION) [Presented : Mar 13, 2024]
Anatoxin-a (ATX) is a cyanobacterial neurotoxin produced in freshwater lakes, streams, and reservoirs both in planktonic and benthic blooms. It is a potent and irreversible nicotinic acetylcholine receptor (nAChR) agonist that causes central and peripheral effects while it is the...
Application of Weight-of-Evidence Methods for Transparent and Defensible Numeric Nutrient Criteria
(PUBLISHED REPORT) [Published : May 22, 2024]
Water quality standards are important for protecting and restoring the condition of lakes, rivers, estuaries, and other water bodies in the United States. Given that nutrient pollution continues to be a widespread problem in aquatic systems, the development of numeric nutrient cr...
Applying High Throughput Toxicokinetics (HTTK) to Per- and Polyfluoro Alkyl Substances (PFAS)
(PRESENTATION) [Presented : Mar 14, 2024]
Background and Purpose: Per- and polyfluoro-alkyl substances (PFAS) are a large and diverse class of organic chemicals in which all (per-) or some (poly-) carbon–hydrogen bonds have been replaced with carbon–fluorine bonds. PFAS are commonly found in human tissues. S...
Applying Microelectrodes to Investigate Aged Ductile Iron and Copper Coupon Reactivity during Free Chlorine Application
(JOURNAL) [Published : Apr 01, 2024]
In drinking water distribution systems, including premise plumbing, dissolved oxygen (DO) and free chlorine (FC) are common oxidants and ductile iron (DI) and copper (Cu) are commonly used pipe materials. Microelectrodes are a tool that have been applied in previous corrosion res...
Applying forecasted data to better understand, quantify, and anticipate the social and environmental justice impacts of HABs
(PRESENTATION) [Presented : Feb 04, 2024]
This presentation is to the Research Area Coordination Team (RACT) for the Safe and Sustainable Waters Research program. This work contributes to SSWR Subproduct 404.3.2 Applying forecasted data to better understand, quantify, and anticipate the social and environmental justice i...
Approaches and Challenges to Assess Nitrogen Impacts using the Driver-Pressure-State-Impact-Response Framework
(PRESENTATION) [Presented : Feb 08, 2024]
The global nitrogen science-policy community lacks a holistic framework for assessing nitrogen (N) impacts on food production, ecosystems, health, and climate. This results in reduced effectiveness and societal welfare benefits in addressing N challenges and creates the potential...
Assessing community vulnerability to extreme events in the presence of contaminated sites and waste management facilities: An indicator approach
(JOURNAL) [Published : Jan 22, 2024]
Communities across the United States are enduring, often unexpectedly, the effects of extreme events, such as excessive heat, prolonged droughts, extreme floods, and wildfires. In places where contaminated sites and waste management facilities are also present, communities must c...
Assessing the condition of the Nation’s waters: How can stable isotopes help?
(PRESENTATION) [Presented : Apr 17, 2024]
Stable isotope ratios integrate, indicate, record, and trace fundamental processes in hydrology and ecology.  Stored within the atoms of samples, stable isotope ratios of specific elements unlock stories about ecological processes that impact water quality and quantity.&nbsp...
Assessing the nucleic acid decay of human wastewater markers and enteric viruses in estuarine waters in Sydney, Australia
(JOURNAL) [Published : May 20, 2024]
This research investigated the in-situ decay rates of four human wastewater-associated markers (Bacteroides HF183 (HF183), Lechnospiraceae Lachno3 (Lachno3), cross-assembling phage (crAssphage), pepper mild mottle virus (PMMoV) and three enteric viruses (human aden...