Articles | Volume 20, issue 8
https://doi.org/10.5194/bg-20-1621-2023
https://doi.org/10.5194/bg-20-1621-2023
Research article
 | 
25 Apr 2023
Research article |  | 25 Apr 2023

How much do bacterial growth properties and biodegradable dissolved organic matter control water quality at low flow?

Masihullah Hasanyar, Thomas Romary, Shuaitao Wang, and Nicolas Flipo

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Cited articles

Bailey, R. T. and Ahmadi, M.: Spatial and Temporal Variability of In-Stream Water Quality Parameter Influence on Dissolved Oxygen and Nitrate within a Regional Stream Network, Ecol. Model., 277, 87–96, https://doi.org/10.1016/j.ecolmodel.2014.01.015, 2014. a, b, c, d
Billen, G.: Protein Degradation in Aquatic Environments, in: Microbial Enzymes in Aquatic Environments, edited by: Brock, T. D. and Chróst, R. J., 123–143, Springer New York, New York, NY, https://doi.org/10.1007/978-1-4612-3090-8_7, 1991. a
Billen, G., Lancelot, C., Becker, E., and Servais, P.: Modelling Microbial Processes (Phyto- and Bacterioplankton) in the Schelde Estuary, Hydrobiological Bulletin, 22, 43–55, https://doi.org/10.1007/BF02256781, 1988. a
Billen, G., Garnier, J., and Hanset, P.: Modelling Phytoplankton Development in Whole Drainage Networks: The RIVERSTRAHLER Model Applied to the Seine River System, Hydrobiologia, 289, 119–137, https://doi.org/10.1007/BF00007414, 1994. a, b, c
Billen, G., Garnier, J., and Rousseau, V.: Nutrient Fluxes and Water Quality in the Drainage Network of the Scheldt Basin over the Last 50 Years, Hydrobiologia, 540, 47–67, https://doi.org/10.1007/s10750-004-7103-1, 2005. a
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The results of this study indicate that biodegradable dissolved organic matter is responsible for oxygen depletion at low flow during summer seasons when heterotrophic bacterial activity is so intense. Therefore, the dissolved organic matter must be well measured in the water monitoring networks in order to have more accurate water quality models. It also advocates for high-frequency data collection for better quantification of the uncertainties related to organic matter.
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