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Modelling trace metal transfer in large rivers under dynamic hydrology: A coupled hydrodynamic and chemical equilibrium model

Garneau, Cyril and Simeoni-Sauvage, Sabine and Sanchez-Pérez, José-Miguel and Lofts, Steve and Brito, David and Neves, Ramiro and Probst, Anne Modelling trace metal transfer in large rivers under dynamic hydrology: A coupled hydrodynamic and chemical equilibrium model. (2017) Environmental Modelling & Software, 89. 77-96. ISSN 1364-8152

(Document in English)

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Official URL: http://dx.doi.org/10.1016/j.envsoft.2016.11.018


Trace metals (TMs) in rivers experience a complex chemistry that affects their partitioning between the dissolved and particulate fractions. Predictive modelling of this partitioning is challenging, particularly under variable hydrodynamic conditions in rivers. This paper presents a coupled hydrodynamic egeochemical model for trace metal dynamics in rivers, to highlight key parameters and set a basis for developing simplified models. A coupled model based on the hydrodynamic model MOHID and the chemical speciation model WHAM was applied to the middle part of the Garonne River (SW-France). The predictions of the coupled model are compared to those of a fixed Kd partitioning model. The model accurately simulates trace metal behaviour under varying hydrological conditions. The importance of the riverbed geomorphology and the diurnal variations in pH on TM concentrations in the water column are underlined. The sensitivity analysis ranked all physico-chemical parameters according to their influence on TM behaviour.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com. The original PDF of the article can be found at : https://www.sciencedirect.com/science/article/pii/S1364815216309628
HAL Id:hal-01713292
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Natural Environment Research Council - NERC (UNITED KINGDOM)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Universidade de Lisboa - ULisboa (PORTUGAL)
Laboratory name:
French Ministry of Higher Education and Research - Paul Sabatier University (ATUPS Program)
Deposited On:20 Feb 2018 13:03

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