Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 7 of 7
Full-Text Articles in Entire DC Network
Analyzing The Impact Of Road Salt In Stormwater On Phosphorus Removal By Duckweed (Lemna Minor), Jenna Fracasso
Analyzing The Impact Of Road Salt In Stormwater On Phosphorus Removal By Duckweed (Lemna Minor), Jenna Fracasso
UVM Patrick Leahy Honors College Senior Theses
Water and nutrients are vital resources to all life forms on Earth. Excess nutrients, however, can have detrimental impacts on aquatic ecosystems. In many watersheds, high phosphorus (P) levels can lead to eutrophication and harmful algal blooms. Stormwater runoff is a major contributor for introducing P into natural water bodies from sources such as agricultural fertilizers and yard waste. Another contaminant that makes its way into stormwater runoff is road salts. In cold climates, various salts are distributed onto roads and sidewalks in large quantities to lower the melting temperature of snow and ice. This study analyzed the intersection of …
Hydrologic Modeling Of A Small Wetland Complex To Inform Estimates Of Phosphorus Retention, Isabelle C. Augustin
Hydrologic Modeling Of A Small Wetland Complex To Inform Estimates Of Phosphorus Retention, Isabelle C. Augustin
UVM Patrick Leahy Honors College Senior Theses
Phosphorus (P) is an important nutrient in ecosystems and is often limiting in freshwater systems and the human application of P in agriculture has made P management a priority to maintain freshwater ecosystem health. Previous studies suggest that small wetlands play a disproportionately large role in landscape-scale nutrient processing. Modeling watershed P dynamics requires estimates of water budgets within the areas of interest. The objective of this work is to model the inflow, outflow, stage, and storage relationships of a small wetland with an active beaver dam in the Prindle Brook floodplain in Addison, VT using HydroCAD. A sensitivity analysis …
Quantifying And Predicting Gully Erosion And Its Contribution To Nutrient Pollution From Vermont's Roads, Frank Carl Piasecki
Quantifying And Predicting Gully Erosion And Its Contribution To Nutrient Pollution From Vermont's Roads, Frank Carl Piasecki
UVM Patrick Leahy Honors College Senior Theses
Water is a precious resource for human life and environmental health, however, human activity contributes a wide variety of contaminants to freshwater systems. Soil erosion adds nutrients, sediment, and pollutants to the water, and contributes to declining water quality downstream. Road networks are particularly important in this context, because roads interrupt the flow of water, often increasing the erosive power of adjacent materials, causing serious local erosion. Despite the importance of roads in the process of water quality impairment, little is known about the severity of this issue or the factors that drive it. This project investigates the magnitude of …
Quantifying Stream Phosphorus Dynamics And Total Suspended Sediment Export In Forested Watersheds In Vermont, Sophia C. Ryan, Beverley Wemple, Donald Ross
Quantifying Stream Phosphorus Dynamics And Total Suspended Sediment Export In Forested Watersheds In Vermont, Sophia C. Ryan, Beverley Wemple, Donald Ross
UVM Patrick Leahy Honors College Senior Theses
Globally the quantity of reactive phosphorus (P) in soils, streams and groundwater has greatly increased throughout the 20th and early 21st centuries. This phenomenon is problematic in Vermont, evidenced by the repeated cyanobacteria blooms in shallow bays in Lake Champlain. While many studies have focused on P dynamics in agricultural watersheds, there is limited information on P dynamics in forested watersheds. Current remediation plans under the Lake Champlain total maximum daily loads (TMDL) call for substantial reductions in P loadings from forested areas of the basin. However, the lack of information and knowledge regarding forest P dynamics limits management and …
Autumn Storms Trigger Enhanced Export Of Iron, Phosphorus, And Carbon From A Forested Vermont Catchment, Austin E. Wilkes
Autumn Storms Trigger Enhanced Export Of Iron, Phosphorus, And Carbon From A Forested Vermont Catchment, Austin E. Wilkes
UVM Patrick Leahy Honors College Senior Theses
Autumn leaf fall may be an important driver of annual stream loading in forested catchments due to the introduction of large amounts of labile organic matter. In light of climate change projections for an intensification of the autumnal hydrological cycle for northern temperate forests, there is an increasing demand to understand this leaf fall period, and the extent to which it may drive water quality. In this study, we examine the export and biogeochemical coupling of dissolved organic carbon (DOC), iron (Fe), aluminum (Al), and phosphorus (P) during autumn and summer storms to understand the effects of seasonality and storm …
Phosphorus Uptake In Emergent Macrophytes: An Evaluation Of Vermont-Native Wetland Plant Suitability For Floating Treatment Wetland Applications In Urban Stormwater Settings, Kelly Westhelle
UVM Patrick Leahy Honors College Senior Theses
The USEPA’s revised total maximum daily load (TMDL) for Lake Champlain has Vermont scientists and legislators seeking effective means for curbing phosphorus loads in the Lake Champlain Basin. Developed lands are a critical nonpoint source for phosphorus loading, and green stormwater infrastructure (GSI) ecologically and effectively slow and/or capture nutrients and other pollutants characteristic of urban stormwater runoff. Floating treatment wetlands (FTWs), buoyant mats fitted with wetland plants, are an inexpensive and effective option for improving the water quality of runoff. In urban settings, FTWs are frequently applied to wet stormwater ponds as retrofits. While there are studies demonstrating the …
Quantifying Nutrient And Sediment Loads During Spring Runoff In The Missisquoi River Basin, Baxter G. Miatke
Quantifying Nutrient And Sediment Loads During Spring Runoff In The Missisquoi River Basin, Baxter G. Miatke
UVM Patrick Leahy Honors College Senior Theses
The timing and magnitude of the spring runoff period and associated high nutrient loads, driven by snowmelt and rain, has recently been suggested as a critical driver of harmful summer algal blooms in receiving waters. This project focused on characterizing nutrient and sediment dynamics during the spring runoff period in the Missisquoi River Basin and quantifying loads during this critical time period. Analysis focused on total phosphorus (TP), total nitrogen(TN), and total suspended solids(TSS). Phosphorus was critical, as it has significant downstream impacts, such as lake eutrophication and harmful algal blooms (HAB’s). Nutrient and sediment loads were quantified during the …