An original approach combining biogeochemical signatures and a mixing model to discriminate spatial runoff-generating sources in a peri-urban catchment

Grandjouan, Olivier; Branger, Flora; Masson, Matthieu; Cournoyer, Benoit; Robinet, Nicolas; Dusseux, Pauline; Dominguez Lage, Angélique; Coquery, Marina

doi:10.5194/hess-30-591-2026

Articles | Volume 30, issue 3

https://doi.org/10.5194/hess-30-591-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-30-591-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 30, issue 3

Research article

|

03 Feb 2026

Research article |

| 03 Feb 2026

An original approach combining biogeochemical signatures and a mixing model to discriminate spatial runoff-generating sources in a peri-urban catchment

Olivier Grandjouan, Flora Branger, Matthieu Masson, Benoit Cournoyer, Nicolas Robinet, Pauline Dusseux, Angélique Dominguez Lage, and Marina Coquery

Data sets

Rainfall monitoring on the Yzeron catchment since 1997 M. Lagouy et al. https://doi.org/10.57745/VVQ2X9

Suivi hydrologique du bassin versant périurbain de l'Yzeron M. Lagouy et al. https://doi.org/10.17180/obs.yzeron

Analyses des indicateurs optiques de la matière organique dissoute mesurés dans les échantillons de sources des bassins versants du Ratier et du Mercier (Lyon, France) M. Masson et al. https://doi.org/10.57745/K3S9YV

Analyses des in- dicateurs optiques de la matière organique dissoute mesurés dans les échantillons de sources des bassins versants du Ratier et du Mercier (Lyon, France) M. Masson et al. https://doi.org/10.57745/HQPIFQ

Analyses des in- dicateurs optiques de la matière organique dissoute mesurés dans les échantillons de sources des bassins versants du Ratier et du Mercier (Lyon, France M. Masson et al. https://doi.org/10.57745/IYJ2VE

Short summary

This study presents a novel approach aimed at using biogeochemical data from surface water to decompose streamwater flow into spatial and vertical contributions. A selection of tracers was used in a mixing model to estimate contributions at the outlet of a peri-urban catchment. Results provided a better understanding of hydrological processes in the catchment and demonstrated the potential of biogeochemical data to discriminate spatial contributions according to land use.