Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot

Surface water from a lagoon and groundwater samples from 17 wells within and near an abandoned feedlot in northwestern Minnesota, USA, were analyzed for carbon, nutrients, and field parameters. The feedlot is surrounded by wetlands that act as receptors of nutrients from the feedlot. Q- and R-mode m...

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Main Authors: P. Gbolo, P. Gerla
Format: Article
Language:English
Published: Copernicus Publications 2013-12-01
Series:Hydrology and Earth System Sciences
Online Access:http://www.hydrol-earth-syst-sci.net/17/4897/2013/hess-17-4897-2013.pdf
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spelling doaj-4e470604f7664d9da4fe7903a67bec452020-11-24T23:41:25ZengCopernicus PublicationsHydrology and Earth System Sciences1027-56061607-79382013-12-0117124897490610.5194/hess-17-4897-2013Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlotP. Gbolo0P. Gerla1Harold Hamm School of Geology and Geological Engineering, University of North Dakota, Grand Forks, ND, USAHarold Hamm School of Geology and Geological Engineering, University of North Dakota, Grand Forks, ND, USASurface water from a lagoon and groundwater samples from 17 wells within and near an abandoned feedlot in northwestern Minnesota, USA, were analyzed for carbon, nutrients, and field parameters. The feedlot is surrounded by wetlands that act as receptors of nutrients from the feedlot. Q- and R-mode multivariate analyses performed on total carbon (TC), inorganic carbon (IC), total organic carbon (TOC), nitrite-nitrogen (NO<sub>2</sub>-N), nitrate-nitrogen (NO<sub>3</sub>-N), ammonium-nitrogen (NH<sub>4</sub>-N), soluble or dissolved reactive phosphorus (DRP), and total phosphorus (TP) indicated three groups of the chemical species, which reflected variability in groundwater chemistry. Factor analysis indicated approximately 82% of the variability in factor 1 was caused by TC, IC, TOC, and DRP, while in factor 2 approximately 79% of the variability was caused by NO<sub>2</sub>-N, NO<sub>3</sub>-N, and TP. In factor 3, only NH<sub>4</sub>-N contributed 31% of the variability. Groundwater isotope and spatial distribution analysis indicated reduced nitrate concentration from the source to the wetlands, with variation in NO<sub>2</sub>-N, NO<sub>3</sub>-N, and NH<sub>4</sub>-N concentrations attributed to the plant nutrient uptake, high rate of denitrification and/or the dissimilatory nitrate reduction to ammonium. This study indicated the value of multivariate analyses in characterizing variability in groundwater quality.http://www.hydrol-earth-syst-sci.net/17/4897/2013/hess-17-4897-2013.pdf
collection DOAJ
language English
format Article
sources DOAJ
author P. Gbolo
P. Gerla
spellingShingle P. Gbolo
P. Gerla
Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot
Hydrology and Earth System Sciences
author_facet P. Gbolo
P. Gerla
author_sort P. Gbolo
title Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot
title_short Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot
title_full Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot
title_fullStr Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot
title_full_unstemmed Statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot
title_sort statistical analysis to characterize transport of nutrients in groundwater near an abandoned feedlot
publisher Copernicus Publications
series Hydrology and Earth System Sciences
issn 1027-5606
1607-7938
publishDate 2013-12-01
description Surface water from a lagoon and groundwater samples from 17 wells within and near an abandoned feedlot in northwestern Minnesota, USA, were analyzed for carbon, nutrients, and field parameters. The feedlot is surrounded by wetlands that act as receptors of nutrients from the feedlot. Q- and R-mode multivariate analyses performed on total carbon (TC), inorganic carbon (IC), total organic carbon (TOC), nitrite-nitrogen (NO<sub>2</sub>-N), nitrate-nitrogen (NO<sub>3</sub>-N), ammonium-nitrogen (NH<sub>4</sub>-N), soluble or dissolved reactive phosphorus (DRP), and total phosphorus (TP) indicated three groups of the chemical species, which reflected variability in groundwater chemistry. Factor analysis indicated approximately 82% of the variability in factor 1 was caused by TC, IC, TOC, and DRP, while in factor 2 approximately 79% of the variability was caused by NO<sub>2</sub>-N, NO<sub>3</sub>-N, and TP. In factor 3, only NH<sub>4</sub>-N contributed 31% of the variability. Groundwater isotope and spatial distribution analysis indicated reduced nitrate concentration from the source to the wetlands, with variation in NO<sub>2</sub>-N, NO<sub>3</sub>-N, and NH<sub>4</sub>-N concentrations attributed to the plant nutrient uptake, high rate of denitrification and/or the dissimilatory nitrate reduction to ammonium. This study indicated the value of multivariate analyses in characterizing variability in groundwater quality.
url http://www.hydrol-earth-syst-sci.net/17/4897/2013/hess-17-4897-2013.pdf
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AT pgerla statisticalanalysistocharacterizetransportofnutrientsingroundwaternearanabandonedfeedlot
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