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Records 26 to 50 of 63

Regenerative Stormwater Conveyance (RSC) for reducing nutrients in urban stormwater runoff depends upon carbon quantity and quality
(JOURNAL) [Published : Feb 01, 2019]
Regenerative stormwater conveyance (RSC), a relatively new stormwater management approach, is extensively implemented throughout the mid-Atlantic for nutrient control, but little is known of its pollutant reduction capabilities and controlling factors. This study examined effects...
‘A tale of two cities’: Nitrogen inventories in the Nooksack-Fraser Transboundary Watershed
(PRESENTATION) [Presented : Oct 14, 2018]
Spanning the border of U.S. and Canada, the Nooksack-Fraser transboundary area (2639 km2) is home to the communities of Lynden, Washington, and Abbotsford, British Columbia, with a strong base in farming, fisheries and outdoor recreation. Balancing these uses is a key issue in t...
Long-term nutrient addition increases respiration and nitrous oxide emissions in a New England salt marsh
(JOURNAL) [Published : May 01, 2018]
Salt marshes may act either as greenhouse gas (GHG) sources or sinks depending on hydrological conditions, vegetation communities, and nutrient availability. In recent decades, eutrophication has emerged as a major driver of change in salt marsh ecosystems. An ongoing fertilizati...
Nitrogen inventories in the Nooksack-Fraser Transboundary Watershed
(PRESENTATION) [Presented : Jul 20, 2018]
Excessive nitrogen (N) loading can lead to eutrophication in coastal and fresh waters, air quality issues, and nitrate contamination of groundwater. The Nooksack-Fraser Transboundary-Nitrogen (NFT-N) project was developed to explore ways to work with a community to balance the be...
The Application and Usefulness of Economic Analyses for Water Quality Management in Coastal Areas
(JOURNAL) [Published : Dec 27, 2017]
Economic studies are increasingly sought as tools to contribute to water quality management in estuaries and coastal communities, yet little is known about how the results from existing studies have been received and utilized by the organizations who solicited them. We interviewe...
Stable isotopes of algae and macroinvertebrates in streams respond to watershed urbanization, inform management goals, and indicate food web relationships
(JOURNAL) [Published : Jul 02, 2018]
Watershed development and anthropogenic sources of nitrogen are among leading causes of negative impacts to aquatic ecosystems around the world. The δ15N of aquatic biota can be used as indicators of anthropogenic sources of nitrogen enriched in 15N, but this mostly has bee...
Nitrogen input inventory in the Nooksack-Fraser Transboundary Region: Key component of an international nitrogen management study
(PRESENTATION) [Presented : Dec 15, 2017]
The Nooksack-Abbotsford-Sumas (NAS) Transboundary Watershed, spanning which spans a portion of the western interface of British Columbia, Washington State, and the Lummi Nation and the Nooksack Tribal lands , supports agriculture, estuarine fisheries, diverse wildlife, and urban ...
Barriers and Opportunities for the Use of Alternative Technologies to Reduce Nitrogen in Coastal Estuaries
(PRESENTATION) [Presented : Nov 05, 2017]
In coastal New England, many communities wrestling with nitrogen over-enrichment from insufficient wastewater management are considering alternative technologies to supplement traditional sewering technology. In particular, communities on Cape Cod, Massachusetts are actively comp...
Application of a structured decision making process for nitrogen pollution management on Cape Cod
(PRESENTATION) [Presented : Nov 06, 2017]
Significant release of reactive nitrogen into coastal water bodies has resulted in declining water quality in Southern New England. The Three Bays Preservation Association, in collaboration with the Cape Cod Commission, U.S. Environmental Protection Agency, and local water resou...
CMAQ modeling in the nitrogen inventory study in the Nooksack-Abbotsford-Sumas Transboundary Region
(PRESENTATION) [Presented : Nov 03, 2017]
Optimizing nitrogen (N) use for food production while minimizing the release of N and co-pollutants to the environment is an important challenge. The Nooksack-Abbotsford-Sumas Transboundary (NAS) Region, spanning a portion of the western interface of British Columbia, Washington...
Nitrogen input inventory in the Nooksack-Abbotsford-Sumas Transboundary Region: Key component of an international nitrogen management study.
(PRESENTATION) [Presented : Aug 11, 2017]
Background/Question/Methods: Nitrogen (N) is an essential biological element, so optimizing N use for food production while minimizing the release of N and co-pollutants to the environment is an important challenge. The Nooksack-lower Fraser Valley, spanning a portion of the w...
Nitrogen input inventory in the Nooksack-Abbotsford-Sumas Transboundary Region: Key component of an international nitrogen management study
(PRESENTATION) [Presented : Jun 30, 2017]
Nitrogen (N) is an essential biological element, so optimizing N use for food production while minimizing the release of N and co-pollutants to the environment is an important challenge. The Nooksack-Abbotsford-Sumas Transboundary (NAS) Region, spanning a portion of the western...
Canadian-US Demonstration Project Towards an International Nitrogen Assessment System
(PRESENTATION) [Presented : Dec 10, 2016]
Bellingham Bay will provide the test case for an international nitrogen (N) management system for North America. Spanning a portion of the western interface of the U.S. and Canada, the region supports intensive agriculture, freshwater and estuarine fisheries, diverse wildlife, ci...
Ecosystem services impacts associated with environmental reactive nitrogen release in the United States
(PRESENTATION) [Presented : Dec 10, 2016]
Nitrogen release to the environment from human activities can have important and costly impacts on human health, recreation, transportation, fisheries, and ecosystem health. Recent efforts to quantify these damage costs have identified annual damages associated with reactive nit...
Economic Tools for Managing Nitrogen in Coastal Watersheds
(PUBLISHED REPORT) [Published : Mar 24, 2016]
Watershed managers are interested in using economics to communicate the value of estuarine resources to the wider community, determine the most cost-effective means to reduce nitrogen pollution, and evaluate the benefits of taking action to improve coastal ecosystems. We spoke to...
Is it working? A look at the changing nutrient practices in the Southern Willamette Valley's Groundwater Management Area
(PRESENTATION) [Presented : Jul 27, 2016]
Groundwater nitrate contamination affects thousands of households in the southern Willamette Valley and many more across the Pacific Northwest. The southern Willamette Valley Groundwater Management Area (SWV GWMA) was established in 2004 due to nitrate levels in the groundwater ...
N-Sink: A Tool to Identify Nitrogen Sources and Sinks within aWatershed Framework
(COMMUNICATION PRODUCT) [Published : Sep 30, 2013]
N-Sink is a customized ArcMap© program that provides maps of N sourcesand sinks within a watershed, and estimates the delivery efficiency of N movement from sources to the watershed outlet. The primary objective of N-Sink is to assist land use planners, watershed managers, and la...
How to Calculate Your Institution's Nitrogen Footprint
(EXTRAMURAL DOCUMENT) [Published : Aug 01, 2015]
The Nitrogen Footprint Tool (NFT) allows institutions to estimate and manage their nitrogen footprint, and EPA’s Sustainable and Healthy Communities program is supporting an effort to test and expand this approach at multiple colleges, universities and institutions across t...
Effects of stormwater management and stream restoration on watershed nitrogen retention
(JOURNAL) [Published : Jun 18, 2014]
Restoring urban infrastructure and managing the nitrogen cycle represent emerging challenges for urban water quality. We investigated whether stormwater control measures (SCMs), a form of green infrastructure, integrated into restored and degraded urban stream networks can influ...
Is it working? A look at the changing nutrient practices in the Southern Willamette Valley’s Groundwater Management Area
(PRESENTATION) [Presented : May 01, 2015]
Groundwater nitrate contamination affects thousands of households in the southern Willamette Valley and many more across the Pacific Northwest. The southern Willamette Valley Groundwater Management Area (SWV GWMA) was established in 2004 to address the occurrence of high groundw...
Tracking the fate of watershed nitrogen: The “N-Sink” Web Tool and Two Case Studies
(PUBLISHED REPORT) [Published : Sep 16, 2014]
This product describes the application of a web-based decision support tool, N-Sink, in two case study watersheds. N-Sink is a customized ArcMap© program that provides maps of N sourcesand sinks within a watershed, and estimates the delivery efficiency of N movement from sou...
Adaptation of a Weighted Regression Approach to Evaluate Water Quality Trends in Tampa Bay, Florida
(PRESENTATION) [Presented : May 04, 2014]
The increasing availability of long-term monitoring data can improve resolution of temporal and spatial changes in water quality. In many cases, the fact that changes have occurred is no longer a matter of debate. However, the relatively simple methods that have been used to ev...
A Decision Support Tool to Evaluate Sources and Sinks of Nitrogen within a Watershed Framework
(PRESENTATION) [Presented : Feb 07, 2013]
Human transformation of the nitrogen (N) cycle is causing a number of environmental and human health problems. Federal, state and local authorities focusing on management of N loadings face both technical and non-technical challenges. One technical issue is that we need a bette...
Lessons Learned from the Bay Region Atmospheric Chemistry Experiment (BRACE) and Implications for Nitrogen Management of Tampa Bay
(JOURNAL) [Published : May 05, 2013]
Results from air quality modeling and field measurements made as part of the Bay Region Atmospheric Chemistry Experiment (BRACE) along with related scientific literature were reviewed to provide an improved estimate of atmospheric reactive nitrogen (N) deposition to Tampa Bay, to...
Utilizing Physical Input-Output Model to Inform Nitrogen related Ecosystem Services
(PRESENTATION) [Presented : May 17, 2013]
Here we describe the development of nitrogen PIOTs for the midwestern US state of Illinois with large inputs of nitrogen from agriculture and industry. The PIOTs are used to analyze the relationship between regional economic activities and ecosystem services in order to identify...