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Records with

  • Keyword = Nutrients.
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Records 1 to 25 of 2492

Optimal selection and location of nutrient recovery systems considering standalone and coordinated strategies
(PRESENTATION) [Presented : Nov 20, 2020]
Livestock farming and other agricultural activities have altered the natural nutrient cycles. This has been the result of the technification and intensification of agricultural production processes, which decreases the mobility and availability of nitrogen and phosphorus. Among t...
Exploring the potential value of satellite remote sensing to monitor chorophyll-a for U.S. lakes and reservoirs.
(JOURNAL) [Published : Dec 02, 2020]
Assessment of chlorophyll-a, an algal pigment, typically measured by field and laboratory in situ analyses, is used to estimate algal abundance and trophic status in lakes and reservoirs. In situ-based monitoring programs can be expensive, may not be spatially and temporally com...
Key components and contrasts in the nitrogen budget across a US-Canadian transboundary watershed & links to Puget Sound
(PRESENTATION) [Presented : Oct 28, 2020]
Watershed nitrogen (N) budgets provide insights into drivers and solutions for groundwater and surface water N contamination. We constructed a comprehensive N budget for the transboundary Nooksack River Watershed (British Columbia, Canada and Washington, US) using locally-derive...
Land Application Field Study II
(PRESENTATION) [Presented : Aug 20, 2020]
This presentation describes a field study which occurred from 2012 to 2015. The broad goal of this research study is to evaluate the fate of chemical and microbial species in biosolids after land application. In this study, Class B biosolids were applied to a field at agronomic l...
DNA metabarcoding effectively quantifies diatom responses to nutrients in streams
(JOURNAL) [Published : Dec 01, 2020]
Nutrient pollution from human activities remains a common problem facing stream ecosystems. Identifying ecological responses to phosphorus and nitrogen can inform decisions affecting the protection and management of streams and their watersheds. Diatoms are particularly useful be...
COW2NUTRIENT: a Python GIS tool for the assessment of nutrient recovery systems in livestock facilities
(PRESENTATION) [Presented : Oct 03, 2020]
Nutrient pollution is one of the major worldwide water quality problems, resulting in environmental and public health issues. One key source of nutrient releases is the agricultural economic sector that generates substantial amounts of organic waste, representing a challenge in t...
Critical Water Quantity and Quality (WQ2) Sensing, Monitoring and Modeling for Watershed Nutrient Pollution Management
(PRESENTATION) [Presented : Oct 27, 2020]
Slide presentation overviewing East Fork Watershed Study research and the critical water quality and quantity sensing, monitoring and modeling needs for watershed nutrient management as learned over the history of the East Fork Watershed Cooperative.
Expanding nutrient indicator monitoring with satellites
(PRESENTATION) [Presented : Nov 04, 2020]
New technologies are changing the way we can monitor pollution levels in the environment. While satellite technology cannot detect nutrients directly, EPA is studying their utility for monitoring indicators of nutrients through environmental responses in aquatic environments. Nut...
The U.S. consumer phosphorus footprint: where do nitrogen and phosphorus diverge?
(JOURNAL) [Published : Oct 16, 2020]
Phosphorus (P) and nitrogen (N) are essential nutrients for food production but their excess use in agriculture can have major social costs, particularly related to water quality degradation. Nutrient footprint approaches estimate N and P release to the environment through food p...
Key components and contrasts in the nitrogen budget across a US-Canadian transboundary watershed
(JOURNAL) [Published : Sep 01, 2020]
Watershed nitrogen (N) budgets provide insights into drivers and solutions for groundwater and surface water N contamination. We constructed a comprehensive N budget for the transboundary Nooksack River Watershed (BC, Canada and WA, US) using locally-derived data, national stati...
Using a Communications Plan for Strategic Stakeholder Engagement in a Solutions-Driven Research Pilot
(PRESENTATION) [Presented : Nov 19, 2020]
Effective stakeholder communication in scientific research demands a coordinated plan to strategically engage with various groups based on their interest, expertise, and influence. This is the focus of researchers at the U.S. Environmental Protection Agency’s Office of Rese...
Applying Stakeholder Mapping to Identify and Address Diverse Needs in Community-centric Project Planning
(PRESENTATION) [Presented : Nov 19, 2020]
The success of a stakeholder-centric project hinges upon identifying and managing the needs and expectations of a range individuals and organizations. For multi-sector projects involving many researchers, navigating a landscape of stakeholders to meet these varying needs can be c...
Biochar and Other Amendments Promote Douglas fir Survival and Growth on Mine Tailings
(PRESENTATION) [Presented : Nov 19, 2020]
In the western US, there are over 33,000 abandoned sites where heavy metal contaminated mine tailings contaminate local ground and surface water sources. At these sites, revegetation is required to prevent further erosion of heavy metal contaminated soils into nearby waters. Ho...
Investigating the ecology of microcystin synthesis in freshwater toxic harmful algal blooms via DNA/RNA metabarcoding
(PRESENTATION) [Presented : Nov 19, 2020]
The presence of the cyanobacterial hepatotoxin microcystin in drinking water and natural aquatic systems has become a global concern. Understanding the environmental factors that cause cyanobacteria to produce microcystin is crucial to the development of lake management strategie...
The Influence of Stormwater Management Practices and Wastewater Infiltration on Groundwater Quality: Case Studies
(PUBLISHED REPORT) [Published : Jun 30, 2020]
In 2015, U.S. EPA initiated a study to examine the potential impacts to groundwater quality from the use of GI and the results will be presented in this report. This study was conducted under the Safe and Sustainable Water Resources program (SSWR). An overarching objective of the...
Stable Isotopes in Tree Rings: Inferring Physiological, Climatic and Environmental Responses.
(PRESENTATION) [Presented : Aug 07, 2020]
We are editing a new book in the Springer Tree Physiology Series entitled “Stable Isotopes in Tree Rings: Inferring Physiological, Climatic and Environmental Responses” due out in 2020. Because trees produce annual growth increments that can be precisely dated, annua...
Are Tidal Salt Marshes Exposed to Nutrient Pollution more Vulnerable to Sea Level Rise?
(JOURNAL) [Published : Oct 01, 2020]
Over the past four decades, Long Island, NY, USA, has lost coastal wetlands at a rate of 4% per decade due to submergence. In this study, we examined relationships between the rate of tidal salt marsh loss and environmental factors, including marsh elevation, tidal range, and was...
Science to Support Nutrient-Related Water Quality Goals
(PRESENTATION) [Presented : Nov 03, 2020]
Nutrient pollution is the most widespread water quality problem facing the United States, with far-ranging consequences for environmental condition, economic prosperity, and human health and well-being. This work will advance the science to inform decisions related to nutrient an...
Model-driven spatial evaluation of nutrient recovery from livestock leachate for struvite production
(JOURNAL) [Published : Oct 01, 2020]
Nutrient pollution is one of the major worldwide water quality problems, resulting in environmental and public health issues. Agricultural activities are the main source of nutrient release emissions, and the livestock industry has been proven to be directly related to the presen...
Logistics Network Management of Livestock Waste for Spatiotemporal Control of Nutrient Pollution in Water Bodies
(JOURNAL) [Published : Nov 18, 2019]
Nutrient pollution is a widespread water quality problem, which originates from excess nutrient runoff from agricultural land, improperly managed farming operations, and point sources such as wastewater treatment plants. Some nutrient pollution impacts include harmful algal bloom...
Quantifying the Effects of Surface Conveyance of Treated Wastewater Effluent on Groundwater, Surface Water, and Nutrient Dynamics in a Large River Floodplain
(JOURNAL) [Published : Apr 01, 2019]
Restoration and reconnection of floodplain systems provide multiple societal and ecosystem benefits, while providing municipalities the opportunity to attempt alternative approaches to maintain infrastructure protection and function. In some restored floodplains, treated wastewat...
Developing spatially-explicit midpoint characterization factors for eutrophication potential
(PRESENTATION) [Presented : Sep 24, 2020]
Eutrophication is a global environmental issue that affects freshwater and marine ecosystems, as well as human health, recreation, and economies. Increased cycling of nutrients, especially nitrogen (N) and phosphorus (P), can lead to the rapid growth of algae, causing harmful alg...
A Meta-Analysis of Stressors from the Total Environment Associated with Children’s General Cognitive Ability
(JOURNAL) [Published : Jul 29, 2020]
General cognitive ability, often referred to as ‘general intelligence’, comprises a variety of correlated abilities including spatial and verbal abilities, information processing speed, and memory. Childhood general cognitive ability is a well-studied area of research...
Seasonal and Diel Oxygen and Phytoplankton Dynamics in an Estuarine Water Quality Model
(PUBLISHED REPORT) [Published : Mar 23, 2020]
We describe calibration and evaluation of a water quality model being implemented for Narragansett Bay to quantify the response of concentrations of phytoplankton chlorophyll a and dissolved oxygen in the Bay to loading rates of nutrients and other boundary conditions. We evaluat...
Introduction to a conference session entitled: Innovations in Onsite Waste Treatment Technology to Achieve Nitrogen Reduction Goals in Coastal Systems
(PRESENTATION) [Presented : Oct 01, 2020]
Many estuaries and coastal embayments across the US are significantly impaired due to over-enrichment with nonpoint source nitrogen. Onsite septic systems are an important source of nonpoint nitrogen in many of these ecosystems (up to 80-85% of controllable load). Traditional se...