title: Spatial assessment of water quality in the vicinity of Lake Alice National Wildlife Refuge, Upper Devils Lake Basin, North Dakota.
abstract: Runoff from concentrated animal feeding operations and croplands in the Upper Devils Lake Basin (Towner and Ramsey Counties), North Dakota, has the potential to impact the water quality and wildlife of the Lake Alice National Wildlife Refuge. Water samples were collected at eight locations upstream and downstream of the refuge, beginning in June 2007 through March 2011, to identify the spatial distribution of water quality parameters and assess the potential impacts from the upstream land use practices. Geographic Information Systems, statistical analysis, and regulatory standards were used to differentiate between sample locations, and identify potential impacts to water quality for the refuge based on 20 chemical constituents. Kruskal-Wallis analysis of variance (ANOVA) showed significant differences between sample locations based on boron, calcium, Escherichia coli, phosphorus, aluminum, manganese, and nickel. Hierarchical agglomerative cluster analysis of these constituents identified four distinct water quality groupings in the study area. Furthermore, this study found a significant positive correlation between the nutrient measures of nitrate-nitrite and total Kjeldahl nitrogen, and the percentage of concentrated animal feeding operation nutrient management areas using the non-parametric Spearman rho method. Significant correlations were also noted between total organic carbon and nearness to concentrated animal feeding operations. Finally, dissolved oxygen, pH, sulfate, E. coli, total phosphorus, nitrate-nitrite, and aluminum exceeded state of North Dakota and/or US Environmental Protection Agency water quality standards and/or guidelines. Elevated concentrations of phosphorus, nitrate-nitrite, and E. coli from upstream sources likely have the greatest potential impact on the Lake Alice Refuge.
authors: Department of Geography, University of North Dakota, Grand Forks, ND, 58202, USA, gregory.vandeberg@und.edu.
authors: Gregory S
authors: GS
authors: Vandeberg
authors: Cami S
authors: CS
authors: Dixon
authors: Brian
authors: B
authors: Vose
authors: Mark R
authors: MR
authors: Fisher
mesh_terms: D004777:Environment; D004784:Environmental Monitoring / Q000379:methods*; D004926:Escherichia coli; D060106:Lakes / Q000737:chemistry* / Q000382:microbiology; D009584:Nitrogen / Q000032:analysis; D009658:North Dakota; D010758:Phosphorus / Q000032:analysis; D014873:Water Pollutants / Q000032:analysis*; D060753:Water Quality
chemical_list: D014873:Water Pollutants; D010758:Phosphorus; D009584:Nitrogen
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