Modeling the influence of land use on groundwater chloride loading to lakes

McGinley, Paul M.

doi:10.1080/07438140809354055

Cited by 3 publications

(3 citation statements)

References 18 publications

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“…The calcium, magnesium and alkalinity concentrations increased with increasing nitrate concentrations in the high nitrate group in the upper Cambrian/Ordovician surficial geology consistent with the increased weathering of carbonate minerals expected following nitrification (Browne et al, 2008;Gandois et al, 2011). The increased concentrations of chloride and sodium with increasing nitrate concentrations in both surficial geology groups was consistent with the application of potassium chloride fertilizers and deicing salts, and mineral weathering (McGinley, 2008;Jin et al, 2008). Potassium increases in samples with elevated nitrate concentrations was also consistent with the addition of potassium fertilizer.…”

Section: Anthropogenic Nitrogen and Major Ion Chemistrysupporting

confidence: 72%

Impact of anthropogenic geochemical change and aquifer geology on groundwater phosphorus concentrations

McGinley

Masarik

Gotkowitz³

et al. 2016

Applied Geochemistry

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Section: Anthropogenic Nitrogen and Major Ion Chemistrysupporting

confidence: 72%

Impact of anthropogenic geochemical change and aquifer geology on groundwater phosphorus concentrations

McGinley

Masarik

Gotkowitz³

et al. 2016

Applied Geochemistry

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“…For example, Novotny et al (2008) demonstrated that sodium and chloride levels are 10-25 times higher in urban Minneapolis lakes impacted by road salt-containing runoff compared to non-urban lakes in the same region. Increasing chloride levels have also been observed in lakes in New Hampshire (Rosenberry et al 1999;Likens and Buso 2010), Wisconsin (McGinley 2008), New York (Godwin et al 2003), Ontario (Molot and Dillon 2008;Meriano et al 2009), Michigan (Tuchman et al 1984;Bridgeman et al 2000), Norway (Kjensmo 1997), and Sweden (Thunqvist 2004). Given that 66% of the salt used in the USA in 2009 was applied to highways for deicing and that use of salt for road deicing has risen steadily from ∼170,000 tons/year in the early 1940s to >15,000,000 tons/year between 2005 and 2009 (Salt Institute 2011), this is perhaps unsurprising.…”

Section: Introductionmentioning

confidence: 86%

Redox Stratification and Salinization of Three Kettle Lakes in Southwest Michigan, USA

Koretsky

Macleod

Sibert

et al. 2011

Water Air Soil Pollut

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Redox stratification, especially hypolimnetic anoxia resulting from eutrophication, and salinization resulting from application of salts for road deicing is investigated in three kettle lakes in southwest Michigan. Two of the lakes (Asylum and Woods Lakes) are located in urban Kalamazoo, Michigan, and the third (Brewster Lake) is located in rural Hastings, Michigan. In summer, the water columns of all three lakes are distinctly redox stratified, with anoxic hypolimnia and significant accumulation of reduced solutes (e.g., Mn(II), Fe(II), ammonia) in the lake bottom waters. Extremely elevated conductivity, chloride, sodium, and potassium levels are observed in the urban Asylum and Woods Lakes compared to the rural Brewster Lake, presumably due to runoff of road salt deicers applied in the surrounding watershed. These significant changes in water quality are of concern because they may detrimentally impact lake mixing, biodiversity, and ecosystem function in the urban lakes.

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“…Chloride continued an increase after 1970 at 1.7 mg/L/year ( r 2 = 0.92; p < 0.001), exceeding 50 mg/L by 1985. We attribute the increase in Cl to increases in KCl fertilizer use in the maize‐alfalfa system, as (1) KCl fertilizer dwarfs other sources such as road salt and septage in agricultural landscapes (McGinley 2006); (2) livestock animal units (and hence manure Cl) have been roughly constant; and (3) Springfield Corners ground water Cl trends generally followed national trends in fertilizer‐K (Figure 1). That ground water NO 3 and Cl parallel fertilizer use trends bolsters confidence that both are related to fertilizer use.…”

Section: Resultsmentioning

confidence: 99%

Agricultural Pollutant Penetration and Steady State in Thick Aquifers

et al. 2007

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The leakage of pollutants from agricultural lands to aquifers has increased greatly, driven by increasing fertilizer and pesticide use. Because this increase is recent, ground water pollutant concentrations, loads, and exports may also be increasing as pollutants penetrate more deeply into aquifers. We established in an aquifer profile a ground water recharge and pollutant leakage chronology in an agricultural landscape where 30 m of till blankets a 57-m thick sandstone aquifer. Pollutant concentrations increased from older ground water (1963) at the aquifer base to younger ground water (1985) at its top, a signal of increasing pollutant leakage. Nitrate-N increased from 0.9 to 13.2 mg/L, implying that leakage increased from 1.9 to 16.5 kg/ha/year. Nitrate load and export could increase from 130% to 230% before reaching a steady state in 20 to 40 years. Chloride increases were similar. Pesticide residues alachlor ethane sulfonic acid (ESA), metolachlor ESA, and atrazine residues partially penetrated the aquifer profile. Their concentration-age-date patterns exhibited an initial increase and then a leveling corresponding to the timing of product adoption and leveling of demand. Unlike NO(3), projecting pesticide residue steady states is complicated by the phasing in and out of pesticide products over time; for example, neither alachlor nor atrazine is currently used in the area, and newer products, which have not had time to transit to the aquifer, have been adopted. The circumstances that resulted in the lack of a pollutant steady state are not rare; thus, the lack of steady states in agricultural region aquifers may not be uncommon.

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Modeling the influence of land use on groundwater chloride loading to lakes

Cited by 3 publications

References 18 publications

Impact of anthropogenic geochemical change and aquifer geology on groundwater phosphorus concentrations

Impact of anthropogenic geochemical change and aquifer geology on groundwater phosphorus concentrations

Redox Stratification and Salinization of Three Kettle Lakes in Southwest Michigan, USA

Agricultural Pollutant Penetration and Steady State in Thick Aquifers

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