Examining Relationships Between Groundwater Nitrate Concentrations in Drinking Water and Landscape Characteristics to Understand Health Risks

Hamlin, Q. F.; Martin, Sherry L.; Kendall, A. D.; Hyndman, D. W.

doi:10.1029/2021gh000524

Cited by 12 publications

(7 citation statements)

References 98 publications

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“…The tile field pathway is a major contributor (>1053 kg/km 2 /yr TN, >27.71 kg/km 2 /yr TP) in agricultural areas (e.g., Southern Lake Michigan basin, Saginaw Bay, western Lake Erie, and Lake Ontario basins), likely due to high chemical fertilizer and manure inputs, along with higher tile drainage density. Lakes Erie, Ontario, and southwestern and the thumb area of Lake Michigan showed higher TN and TP delivery through groundwater flow, possibly due to higher groundwater withdrawal rates in these areas and elevated nitrate concentrations . The septic plume yields were the highest around large cities, where dense suburban populations are not yet connected to sewer systems.…”

Section: Resultsmentioning

confidence: 99%

“…Lakes Erie, Ontario, and southwestern and the thumb area of Lake Michigan showed higher TN and TP delivery through groundwater flow, possibly due to higher groundwater withdrawal rates in these areas and elevated nitrate concentrations. 90 The septic plume yields were the highest around large cities, where dense suburban populations are not yet connected to sewer systems. These results also show substantial variability across the US-GLB basins, with different dominant pathways in different Lake basins (Figure 7).…”

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confidence: 99%

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Important Role of Overland Flows and Tile Field Pathways in Nutrient Transport

Wan,

Kendall,

Martin

et al. 2023

Environ. Sci. Technol.

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Nitrogen and phosphorus pollution is of great concern to aquatic life and human well-being. While most of these nutrients are applied to the landscape, little is known about the complex interplay among nutrient applications, transport attenuation processes, and coastal loads. Here, we enhance and apply the Spatially Explicit Nutrient Source Estimate and Flux model (SENSEflux) to simulate the total annual nitrogen and phosphorus loads from the US Great Lakes Basin to the coastline, identify nutrient delivery hotspots, and estimate the relative contributions of different sources and pathways at a high resolution (120 m). In addition to in-stream uptake, the main novelty of this model is that SENSEflux explicitly describes nutrient attenuation through four distinct pathways that are seldom described jointly in other models: runoff from tile-drained agricultural fields, overland runoff, groundwater flow, and septic plumes within groundwater. Our analysis shows that agricultural sources are dominant for both total nitrogen (TN) (58%) and total phosphorus (TP) (46%) deliveries to the Great Lakes. In addition, this study reveals that the surface pathways (sum of overland flow and tile field drainage) dominate nutrient delivery, transporting 66% of the TN and 76% of the TP loads to the US Great Lakes coastline. Importantly, this study provides the first basin-wide estimates of both nonseptic groundwater (TN: 26%; TP: 5%) and septic-plume groundwater (TN: 4%; TP: 2%) deliveries of nutrients to the lakes. This work provides valuable information for environmental managers to target efforts to reduce nutrient loads to the Great Lakes, which could be transferred to other regions worldwide that are facing similar nutrient management challenges.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Important Role of Overland Flows and Tile Field Pathways in Nutrient Transport

Wan,

Kendall,

Martin

et al. 2023

Environ. Sci. Technol.

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“…All recorded values are negligible and within the acceptable limits of 50 mg/L for potability (SON, 2007;WHO, 2014;. Hamlin et al (2022) attributed this to the chemical composition and quality of groundwater, mostly on the soils accumulated in groundwater.…”

Section: ) Statistical Analysesmentioning

confidence: 85%

Physico-chemical and bacteriological assessments of shallow well water samples during the dry and rainy seasons

Ayeni,

Oyegoke,

Ndububa

et al. 2023

Nig. J. Technol. Dev.

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There is need to study the impact of seasonal variations on well water quality especially in Ado – Ekiti metropolis as this will assist in creating awareness on groundwater quality for domestic consumption. The quality of groundwater obtained during dry and rainy seasons from 60 privately utilized hand-dug closed wells in Ado Ekiti metropolis were assessed. Physicochemical and bacteriological investigations were carried out according to required standards. The temperature, colour, turbidity, pH, total solids, chlorides, sulphate, calcium, magnesium, nitrate, and iron, which are physico-chemical parameters of the well water samples ranged from 24.7 to 25.6 °C, 4.1 to 7.3 HU, 3.7 to 6.9 NTU, 7.3 to 7.5, 95.7 to 211.1 mg/L, 38.6 to 74.6 mg/L, 34.3 to 64.9 mg/L, 24.3 to 49.4 mg/L, 48.1 to 89.0 mg/L, 0.4 to 0.8 mg/L and 0.05 to 1.0 mg/L respectively. Despite the fact that the parameters were within the acceptable ranges, bacteriological studies showed the presence of E. coli (ranged from 19.5 to 81.6 CFU) throughout the seasons, thus, individuals who rely on groundwater for their health are exposed to disease-causing organisms. Deductions from the correlation matrix equally, demonstrated the relative dependence of the parameters on one another as they variate according to the change in weather. Mostly during the rainy seasons, higher concentrations of the physicochemical and bacteriological parameters were observed than during the dry seasons, proving that the rainy seasons aid anthropogenic activities from the surface to transmit dissolved harmful waste materials to the subsurface which eventually finds its paths into the groundwater. Improper disposal of faeces, faulty soak-pits, latrines, dumpsites and burial grounds are part of the factors that contribute to bacteriological pollutants in the groundwater source.

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“…Prof. Hamka, Air Tawar, Padang, Sumatera Barat, Indonesia, 25131 http://ejournal.unp.ac.id/index.php/kimia tinggi karena kontaminasi dari berbagai sumber. Tingkat nitrat yang ada dalam air tanah secara alami bergantung pada jenis tanah dan situasi geologis [15]. Konsentrasi nitrat dalam air biasanya diukur menggunakan metode kolorimetri and potensiometri [16].…”

Section: Pengukuran Anion Anorganik Menggunakan Sampel Air Tanah Dan ...unclassified

Pengukuran Anion Anorganik Secara Simultan dalam Sampel Air Tanah dan Air Ledeng Menggunakan Kromatografi Ion

Amin,

Oktavia

2023

Periodic

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Ion chromatography is an advanced and highly sensitive form of ion exchange chromatography that can effectively detect ion species, whether organic or inorganic ions. This research study utilized ion chromatography with a suppressed conductivity detection system to separate and measure the concentration of fluoride, chloride, nitrite, bromide, nitrate, phosphate, and sulfate ions in groundwater and tap water samples. The eluent solution used in this separation contained 6.0 mmol/L Na2CO3 and 0.25 mmol/L NaHCO3, which was crucial in ensuring the accuracy and selectivity of the detections. The samples were collected in 3 sub-districts in Ternate City, and the study's findings shed light on the water quality in the area.

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Examining Relationships Between Groundwater Nitrate Concentrations in Drinking Water and Landscape Characteristics to Understand Health Risks

Cited by 12 publications

References 98 publications

Important Role of Overland Flows and Tile Field Pathways in Nutrient Transport

Important Role of Overland Flows and Tile Field Pathways in Nutrient Transport

Physico-chemical and bacteriological assessments of shallow well water samples during the dry and rainy seasons

Pengukuran Anion Anorganik Secara Simultan dalam Sampel Air Tanah dan Air Ledeng Menggunakan Kromatografi Ion

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