Nitrate transformation and source tracking of Yarlung Tsangpo River using a multi-tracer approach combined with Bayesian stable isotope mixing model

Bao, Yufei; Sun, Meng; Wang, Yuchun; Hu, Mingming; Hu, Peng; Wu, Leixiang; Huang, Wei; Li, Shanze; Wen, Jie; Wang, ZhongJun; Zhang, Qian; Wu, Nanping

doi:10.1016/j.envres.2024.118925

Environmental Research

2024

DOI: 10.1016/j.envres.2024.118925

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Nitrate transformation and source tracking of Yarlung Tsangpo River using a multi-tracer approach combined with Bayesian stable isotope mixing model

Yufei Bao,

Meng Sun,

Yuchun Wang

et al.

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Cited by 3 publications

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Quantitative identification of nitrate pollution sources in karst water in carbonate basins combined with stable isotope tracer techniques

Liu,

Han,

et al. 2024

Ecohydrology & Hydrobiology

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Quantitative identification of nitrate pollution sources in karst water in carbonate basins combined with stable isotope tracer techniques

Liu,

Han,

et al. 2024

Ecohydrology & Hydrobiology

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Deciphering the impact of cascade reservoirs on nitrogen transport and nitrate transformation: Insights from multiple isotope analysis and machine learning

Bao,

Wang,

et al. 2025

Water Research

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How the δ¹⁸O_NO₃ versus δ¹⁵N_NO₃ Plot Can Be Used to Identify a Typical Expected Isotopic Range of Denitrification for NO₃-Impacted Groundwaters

Boumaiza,

Stotler,

Mayer

et al. 2024

ACS EST Water

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Stable isotope values of δ 15 N NOd 3 and δ 18 O NOd 3 of dissolved nitrate (NO 3 ) are commonly used to identify the occurrence of denitrification as there is a progressive increase of δ 15 N NOd 3 and δ 18 O NOd 3 values accompanied by a decrease in NO 3 concentration. Thus, denitrification results in a positive trendline on the dual plot of δ 18 O NOd 3 versus δ 15 N NOd 3 . The combination of two trendlines with different slopes provides the "typical expected isotopic range of denitrification (TEIRD)" on the δ 18 O NOd 3 versus δ 15 N NOd 3 plot. Many studies distinguished denitrified groundwaters by applying the TEIRD concept that is incorrectly introduced because it assumes a single NO 3 source even though multiple NO 3 sources exist. Also, most TEIRD applications rely on specific denitrification slopes although these are known to vary owing to the aquifer's changing biogeochemical conditions. Alternatively, an accurate delineation of the TEIRD requires the identification of all potential NO 3 sources in aquifer with their measured or reconstructed δ 15 N NOd 3 and δ 18 O NOd 3 values. This allows then for an accurate TEIRD to be traced with two denitrification trendlines having a slope corresponding to that from the correlation of the measured δ 18 O NOd 3 and δ 15 N NOd 3 values. Ultimately, each NO 3 source can have a specific TEIRD, although denitrification trendlines for multiple NO 3 sources can feature the same slope within a single aquifer.

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Nitrate transformation and source tracking of Yarlung Tsangpo River using a multi-tracer approach combined with Bayesian stable isotope mixing model

Cited by 3 publications

References 48 publications

Quantitative identification of nitrate pollution sources in karst water in carbonate basins combined with stable isotope tracer techniques

Quantitative identification of nitrate pollution sources in karst water in carbonate basins combined with stable isotope tracer techniques

Deciphering the impact of cascade reservoirs on nitrogen transport and nitrate transformation: Insights from multiple isotope analysis and machine learning

How the δ¹⁸O_NO₃ versus δ¹⁵N_NO₃ Plot Can Be Used to Identify a Typical Expected Isotopic Range of Denitrification for NO₃-Impacted Groundwaters

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Nitrate transformation and source tracking of Yarlung Tsangpo River using a multi-tracer approach combined with Bayesian stable isotope mixing model

Cited by 3 publications

References 48 publications

Quantitative identification of nitrate pollution sources in karst water in carbonate basins combined with stable isotope tracer techniques

Quantitative identification of nitrate pollution sources in karst water in carbonate basins combined with stable isotope tracer techniques

Deciphering the impact of cascade reservoirs on nitrogen transport and nitrate transformation: Insights from multiple isotope analysis and machine learning

How the δ18ONO3 versus δ15NNO3 Plot Can Be Used to Identify a Typical Expected Isotopic Range of Denitrification for NO3-Impacted Groundwaters

Contact Info

Product

Resources

About

How the δ¹⁸O_NO₃ versus δ¹⁵N_NO₃ Plot Can Be Used to Identify a Typical Expected Isotopic Range of Denitrification for NO₃-Impacted Groundwaters