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Groundwater-Surface Water Interactions and Agricultural Nutrient Transport in a Great Lakes Clay Plain System

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Title: Groundwater-Surface Water Interactions and Agricultural Nutrient Transport in a Great Lakes Clay Plain System
Author: Mackie, Ceilidh
Department: School of Engineering
Program: Engineering
Advisor: Levison, Jana
Abstract: Agricultural nutrient contamination is a serious concern for surface and groundwater quality within the Great Lakes Basin (GLB). A year-long field-based watershed-scale study was executed to investigate the spatiotemporal evolution of phosphorus and nitrate in surface and subsurface pathways in an agriculturally-dominated clay plain system within the GLB. Samples from were analyzed for total, total dissolved, soluble reactive, and particulate phosphorus, and nitrate-N to examine the dynamics of key hydrological pathways for transport of agriculturally-derived nutrients in this system. Surface runoff and tile drains were the dominant transport pathways in the watershed, while groundwater was not considered to be a significant contributor of nutrients to the stream. No distinct relationship was observed between nutrient concentrations in the hyporheic zone and the hydrologic connection between groundwater and surface water. The results of this research are imperative for refining and executing nutrient management strategies and agricultural best management practices in the basin.
URI: http://hdl.handle.net/10214/16959
Date: 2019-08
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