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Seagrasses have long been recognized as a habitat providing many important ecological services. Thus, this habitat is afforded protection under the federal Clean Water Act and many state Wetlands Protections Acts. Local, state and federal government natural resource managers ar...

The National Coastal Condition Assessment (NCCA) is part of the National Aquatic Resource Surveys (NARS). NCCA assesses the condition of estuaries every 5 years using a variety of characteristics including the condition of the benthic invertebrates, which are good indicators of...

We have used historical time series data for flow on the Ohio River and developed a theoretically rational means of characterizing the unique hydrologic conditions that coincided with the record-setting HAB in 2015. Two statistical techniques were used to derive significant model...

Over their lifetime, fish experience damage to their fins from a variety of natural sources (e.g., predators, abrasion). Generally, that damage is repaired through the process of fin regeneration. However, some chemicals have been shown to impair the fin regeneration process. Aqu...

Green infrastructure (GI) has been recommended and adopted widely to reduce runoff from the built environment. Reliance on public land for GI implementation causes a heavy financial burden on local government as they manage stormwater. Economic incentives and market-based mechan...

Using combined sewer systems to handle excess stormwater runoff is common in older urban areas. Combined sewer overflow (CSO) events occur when hydraulic capacity is exceeded, and untreated wastewater discharges to surface waters. As urban population density increases and more ...

Floodplains perform several important ecosystem services, including storing water during precipitation events and reducing peak flows, thus reducing flooding of downstream communities. Understanding the relationship between flood inundation and floodplains is critical for ecosyst...

For decades, toxicity tests with aquatic invertebrates have been conducted, and yet a small number of model organisms are routinely used. The US EPA effluent testing program uses short-term chronic freshwater tests (4 to 8d) with cladocerans (Cladocera, Ceriodaphnia dubia), green...

For decades, toxicity tests with aquatic invertebrates have been conducted and yet a small number of model organisms are routinely used. Test organisms are usually easily cultured in the laboratory, have rapid life-cycles, exhibit sensitivity to a variety of pollutants with repro...

Basic life history knowledge of a nonnative species is necessary to accurately determine if the species is truly &ldquo;invasive&rdquo;. One such species, tubenose goby (Proterorhinus semilunaris), is thought to have arrived in the Great Lakes in the 1990s via ballast water in tr...

Basic life history knowledge of a nonnative species is necessary to accurately determine if the species is truly &ldquo;invasive&rdquo;. One such species, tubenose goby (Proterorhinus semilunaris), is thought to have arrived in the Great Lakes in the 1990s via ballast water in tr...

We describe a collection of aquatic and wetland habitats in an inland landscape, and their occurrence within a terrestrial matrix, as a &ldquo;freshwater ecosystem mosaic&rdquo; (FEM). Aquatic and wetland habitats in any FEM can vary widely, from permanently ponded lakes, to ephe...

Dissolved oxygen (DO) has a fundamental effect on both the health and the biogeochemical function of aquatic ecosystems. In estuaries, changes in DO relevant to biotic systems often occur over a wide range of temporal and spatial scales, forced by tidal inundation and rainfall, o...

Drywells are increasingly used to capture stormwater runoff for surface infiltration and aquifer recharge, but little research has examined the role of ubiquitous subsurface heterogeneity in hydraulic properties on drywell performance. Numerical experiments were therefore 29 cond...

Graphene is a two-dimensional nanomaterial composed of sp2 hybridized carbon atoms with unique mechanical, thermal, electrical and optical properties. Due to their high strength and light weight, graphene family nanomaterials (GFNs), such as graphene oxide (GO) are increasingly b...

This presentation discusses the status of EPA&rsquo;s PFAS analytical program . This research is performed under multiple EPA National Research Programs (NRPs) including the Safe and Sustainable Water Resources (SSWR), Air and Energy (A-E), and Sustainable and Healthy Communit...

This presentation provides an overview introduction to the USEPA Office of Research and Development (ORD)'s ongoing green infrastructure (GI) research efforts for stormwater management. GI approaches that increase infiltration, evapotranspiration, and rainwater harvesting offer ...

Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals found in a wide range of consumer products that are persistent in the environment and in the human body. These chemicals, which may lead to adverse human health effects, have been found in drinking water...

This presentation serves as a briefing to the IEDRR workgroup on several aspects of EPA research. The topics covered are 1) The efficacy of surveying fishes via metabarcoding of eDNA samples vs. traditional net-based fish surveys (2016 and 2018 data); 2) The outcome of a 2017 su...

The primary objective of this pilot-scale project was to demonstrate and validate anaerobic membrane bioreactor (AnMBR) technology for domestic wastewater treatment. Specific objectives associated with this project included: 1) demonstrate the effectiveness of AnMBR at treating s...

In 1956 the Minnesota Department of Health asked the School of Public Health of the University of Minnesota to conduct a limnological study of Lake Superior. The original planning of the project was conducted in conference with individuals now widely recognized as early leaders ...

Per- and poly-fluoroalkyl Substances (PFAS) contamination of groundwater sources in the U.S. is a widespread problem for the drinking water industry. Well water supplies in the municipalities of Fountain, Security, and Widefield, Colorado, contain Perfluorooctanoic Acid (PFOA) a...

In terrain analysis and hydrological modeling, surface depressions (or sinks) in a digital elevation model (DEM) are commonly treated as artifacts and thus filled and removed to create a depressionless DEM. Various algorithms have been developed to identify and fill depressions i...

The EPA is considering elongated mineral particulates (EMP) measurements to augment the results of ongoing particulate matter (PM) monitoring and the recently completed occupational work conducted during the Minnesota Taconite Workers Study, which included epidemiological evidenc...

This study compared the thermodynamic efficiencies of struvite derived from wastewater and diammonium phosphate fertilizers in production, crop uptake, and runoff. It showed the trade-offs and insights for alternative nutrient management.