Related Topics: Water Research

Water Research Products in the Science Inventory

Records 1 to 25 of 4990

Willamette River Flow Sensitivity to Cascade Snowpack Variation: Insights from Water Stable Isotopes (PRESENTATION)
Much of the water that people in Western Oregon rely on comes from snowpack in the Cascade Range, and this snowpack is expected to decrease in coming years. In fact, the past 7 years have shown dramatic variation in snowpack, from a high of 174% of normal in 2010-11 to a low of ...
Contributions to the Nutrient Toolbox: Identifying Drivers, Nutrient Sources, and Attribution of Exceedances (PRESENTATION)
Nutrients are a leading cause of impairments in the United States, and as a result tools are needed to identify drivers of nutrients and response variables (such as chlorophyll a), nutrient sources, and identify causes of exceedances of water quality thresholds. This presentatio...
Chesapeake Bay Program Scientific and Technical Advisory Committee Workshop: Monitoring and Assessing Impacts of Changes in Weather Patterns and Extreme Events. "U.S. EPA National Stormwater Calculator" (PRESENTATION)
Stormwater discharges continue to cause impairment of our Nation’s waterbodies. In order to reduce impairment, EPA has developed the National Stormwater Calculator (SWC) to help support local, state, and national stormwater management objectives and regulatory efforts to re...
An integrated environmental and human systems modeling framework for Puget Sound restoration planning. (PRESENTATION)
Local, state, federal, tribal and private stakeholders have committed significant resources to restoring Puget Sound’s terrestrial-marine ecosystem. Though jurisdictional issues have promoted a fragmented approach to restoration planning, there is growing recognition that a...
Beneficial Use of Waste Materials: State of the Practice 2012 (PUBLISHED REPORT)
Solid wastes produced in today’s society originate from a myriad of sources, including households, government, businesses, and industry. Current U.S. federal regulations for solid waste management have been developed to promote sound management of these wastes in a manner protect...
Patterns and sources of nitrogen and microbial contamination in a Pacific Northwest estuarine watershed (PRESENTATION)
Tillamook Bay, a National Estuary Program site, is located on the northwest coast of Oregon. The Bay is one of Oregon’s leading producers of shellfish for human consumption. However, high levels of fecal indicator bacteria that exceed state water quality standards often r...
Moderate Perinatal Thyroid Hormone Insufficiency Alters Visual System Function in Adult Rats (JOURNAL)
Thyroid hormone (TH) is critical for many aspects of neurodevelopment, such as the visual system, but may be disrupted by many environmental contaminants. The experimental data demonstrating a role for TH on visual system development generally derives from studies in which deve...
Developmental Thyroid Hormone Insufficiency Induces Cortical Brain Malformation and Learning Impairments: A Cross-Fostering Study (JOURNAL)
Thyroid hormones (TH) are essential for brain development, but animal models of well-defined and sensitive downstream apical neurotoxic outcomes associated with developmental TH disruption are lacking. A structural anomaly, a cortical heterotopia, in the brains of hypothyroid rat...
Guidelines for Measuring Changes in Seawater pH and Associated Carbonate Chemistry in Coastal Environments of the Eastern United States (PUBLISHED REPORT)
This report begins with descriptions of the differences between coastal and ocean acidification, factors contributing to acidification on the US east coast, and basic characteristics of the seawater carbonate system and its parameters. A basic survey of available methods and cha...
GenX (FRD-902, ammonium (2,3,3,3-tetrafluoro-2-(heptafluoropropoxy)propanoate) Does Not Display Estrogenic, (anti)androgenic or Glucocorticoid-like Activity In Vitro Whereas In Utero Exposure Induces Dose-related Maternal And Fetal Rat Liver PPAR Pathway Gene Expression Without Affecting Fetal Testis Testosterone Production. (PRESENTATION)
GenX (CAS 13252-13-6) is an unregulated, persistent contaminant that has been found in both the Cape Fear River and in Wilmington NC drinking water. Concerns exist about the potential health effects of GenX exposure because it is not removed using traditional water treatment met...
Application of Physiologically-Based Pharmacokinetic/Pharmacodynamic Model for Interpretation of High-throughput Screening Assay for Thyroperoxidase Inhibition (PRESENTATION)
In vitro based assays are used to identify potential endocrine disrupting chemicals. Thyroperoxidase (TPO), an enzyme essential for thyroid hormone (TH) synthesis, is a target site for disruption of the thyroid axis for which a high-throughput screening (HTPS) assay has recently ...
Ammonium Perchlorate Induces Thyroid Hormone Insufficiency and a Cortical Heterotopia in the Rat Brain (PRESENTATION)
A morphological defect, a cortical heterotopia, has been observed in the brains of rat pups exposed in utero to moderate doses of the thyroid hormone (TH) synthesis inhibitor propylthioruracil (PTU). TH insufficiency during late gestation/early postnatal period is required to ind...
Thyroid Hormone Insufficiency in the Pregnant Rat Induces Cortical Heterotopia in Offspring: PTU vs Perchlorate (PRESENTATION)
We have previously reported the presence of a structural defect, a heterotopia in the brains of rat pups exposed in utero to the thyroid hormone (TH) synthesis inhibitor propylthioruracil (PTU). TH insufficiency during late gestation/early postnatal period is required to induce ...
Cortical Brain Malformation and Learning Impairments Induced by Developmental Thyroid Hormone Insufficiency: A Cross-Fostering Study (PRESENTATION)
Although it is clear that severe reductions in thyroid hormones (TH) during development alter brain structure and function, the impact of low level, timing, and duration of TH insufficiency is less well understood. We have previously reported the presence of a cortical heterotopi...
Matanuska-Susitna Index of Watershed Integrity (AK IWI) (PRESENTATION)
The US Environmental Protection Agency’s (EPA) Index of Watershed Integrity (IWI) is used to calculate and visualize the status of natural watershed infrastructure that supports ecological processes (e.g., nutrient cycling) and services provided to society (e.g., subsistenc...
Puget Sound Applications of the VELMA Ecohydrological Model (PRESENTATION)
This seminar will present an overview of EPA’s Visualizing Ecosystem Land Management Assessments (VELMA) model and its applications in the Puget Sound Basin. Topics will include a description of how VELMA simulates the interaction of hydrological and biogeochemical processe...
How Visualizing Ecosystem Land Management Assessments (VELMA) modeling quantifies co-benefits and tradeoffs in Community Forest management (PRESENTATION)
The Northwest Community Forest Coalition invited EPA-WED Research Scientist Bob McKane to present the Keynote Address for the 2018 Northwest Community Forest Forum on May 9‐11 in Astoria, OR. His address will describe "How Visualizing Ecosystem Land Management Assessme...
An integrated environmental and human systems modeling framework for Puget Sound restoration planning (PRESENTATION)
Local, state, federal, tribal and private stakeholders have committed significant resources to restoring Puget Sound’s terrestrial-marine ecosystem. Though jurisdictional issues have promoted a fragmented approach to restoration planning, there is growing recognition that a...
Cylindrospermopsin toxicity in mice following a 90-d oral exposure (JOURNAL)
Cylindrospermopsin (CYN) is a toxin associated with numerous species of freshwater cyanobacteria throughout the world. It is thought to have caused an episode of serious illness in Australia through treated drinking water, as well as lethal effects in livestock exposed to water ...
A critical review of the postulated role of the non-essential amino acid, β-N-methylamino-L-alanine, in neurodegenerative disease in humans (JOURNAL)
The compound BMAA (β-N-methylamino-L-alanine) has been hypothesized to play a significant role in four serious neurological diseases in humans: Amyotrophic Lateral Sclerosis/Parkinsonism Dementia Complex (ALS/PDC) found on Guam, and ALS, parkinsonism, and dementia that occur glob...
Relationships between Private Domestic Wells and Underground Storage Tanks: Evaluation of Mapping and Plume Transport Tool Implementations (PUBLISHED REPORT)
Well water from private domestic wells (hereafter private wells) is often not tested as private owners are exempt from sampling requirements of the Safe Drinking Water Act. Numerous incidents of contamination of water in private wells have been reported, however. Potential cont...
Proximity of Private Domestic Wells to Underground Storage Tanks in Oklahoma (PUBLISHED REPORT)
For protecting drinking water supplies, the locations of areas with reliance on private domestic wells (hereafter referred to as “wells”) and their relationship to contaminant sources need to be determined. A key resource in the U.S. was the 1990 Census where the sour...
Water Use Patterns in a Small Oklahoma City During Drought and Implications for Leaking Underground Storage Tanks (PRESENTATION)
The City of Ada Oklahoma obtains water from the Simpson-Arbuckle aquifer located 19 km south of town. During winter the typical water demand is approximately 15,000 m3 per day, while during the drought of 2011 demand more than doubled. In order to understand water use patterns,...
Locations with High Reliance on Private Wells: Not Always Where You Think They Are (PRESENTATION)
For developing contaminant management strategies and protecting drinking water supplies, the locations of areas with reliance on private domestic wells (PDWs) and their relationship to contaminant sources need to be determined. From 1960 to 1990, a key resource in determining are...
Flow cytometry microscopy and hyperspectral imaging of microcystis, cyanobacteria and algae (PRESENTATION)
The detection of algae and cyanobacteria is an important step in assessing water quality. Studies were initiated using microscopy, flow cytometry and hyperspectral imaging with two fresh water species that could be grown in the laboratory: Microcystis Aeruginosa (cyanobacteria),...