Browsing University of Waterloo by Subject "Nitrate"
Now showing items 1-9 of 9
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Assessment of Nitrate Export in Agricultural Sub-Catchments of the Grand River Watershed: An Isotope Approach
(University of Waterloo, 2015-02-20)Nitrate (NO3-) is one of the most widespread contaminants in freshwater systems globally. This is largely due to high fertilizer application rates that are required to maximize crop yield. Elevated NO3- concentrations can ... -
Bioretention cells under cold climate conditions: Effects of freezing and thawing on water infiltration, soil structure, and nutrient removal
(Elsevier, 2019-02-01)Bioretention cells are a popular control strategy for stormwater volume and quality, but their efficiency for water infiltration and nutrient removal under cold climate conditions has been poorly studied. In this work, ... -
Dissolved inorganic nitrogen cycling in a river receiving wastewater: the response to changes in wastewater treatment effluent
(University of Waterloo, 2016-01-27)Nitrogen is an essential element for all life forms, but when in excess in an aquatic ecosystem, it can cause an imbalance in the trophic status. A significant amount of nitrogen is released into the environment by wastewater ... -
The Effect of Fertilizer Application on Greenhouse Gas Emissions from Willow Short Rotation Coppice Systems in Southern Ontario, Canada
(University of Waterloo, 2016-09-27)Willow (Salix spp.) short-rotation coppice (SRC) systems on marginal lands are effective at providing carbon (C) neutral bioenergy. However, nitrogen (N) fertilizer application, used to enhance aboveground biomass productivity, ... -
Evaluating Regional Aquifer Vulnerability and BMP Performance in an Agricultural Environment Using a Multi-Scale Data Integration Approach
(University of Waterloo, 2009-06-19)The increased use of both organic and synthetic fertilizers on agricultural land has lead to rising groundwater nitrate concentrations in some areas of southern Ontario. This has occurred at the Thornton Well Field in ... -
Paradigm Shift: Does River Metabolism Mask the Isotopic Signal of Nitrate Sources?
(University of Waterloo, 2017-05-19)Nitrate (NO₃⁻) is the most ubiquitous contaminant in surface and groundwaters in Canada. Synthetic fertilizer application and manure production in intensive agricultural areas contribute large quantities of NO₃⁻ to the ... -
Quantification of the Long-Term Effects from Nutrient Reductions on Groundwater Nitrate Concentrations in an Agricultural Setting
(University of Waterloo, 2008-06-06)The Ontario Nutrient Management Act (2002) recommends agricultural Beneficial Management Practices (BMPs) that involve reductions in nutrient applications of nitrogen (N) to fields to improve underlying groundwater quality, ... -
The Role of Nitrate in Controlling Iron Release from Sediment during Anoxia in Dimictic, Fresh Water Lakes
(University of Waterloo, 2018-01-16)Recent research suggests the availability of reduced iron (Fe) is key in allowing cyanobacteria to outcompete eukaryotic phytoplankton. Cyanobacteria have a greater need for Fe than their eukaryotic competition and are ... -
Two centuries of nitrogen dynamics: Legacy sources and sinks in the Mississippi and Susquehanna River Basins
(American Geophysical Union, 2017-01-07)Global flows of reactive nitrogen (N) have increased significantly over the last century in response to agricultural intensification and elevated levels of atmospheric deposition. Despite widespread implementation conservation ...