Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 23
Articles | Volume 22, issue 23
https://doi.org/10.5194/bg-22-7647-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-7647-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 23
Research article
 | 
05 Dec 2025
Research article |  | 05 Dec 2025

Investigating relationships between nitrogen inputs and in-stream nitrogen concentrations and exports across catchments in Victoria, Australia

Olaleye Babatunde, Meenakshi Arora, Siva Naga Venkat Nara, Danlu Guo, Ian Cartwright, and Andrew W. Western

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Latest update: 27 Oct 2026
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Short summary
Excess nitrogen from agriculture can pollute streams and degrade water quality. We estimated fertiliser-nitrogen inputs across land uses, incorporated contributions from other sources, and compared these with long-term stream measurements. Only a small share of inputs left via rivers. Land use, rainfall, and flow regimes strongly influenced nitrogen dynamics and export. These findings support strategies to reduce stream pollution and protect water quality in agricultural areas.
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