1. Contribution of 3D coupled hydrodynamic-ecological modeling to assess the representativeness of a sampling protocol for lake water quality assessment
- Author
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Soulignac Frédéric, Anneville Orlane, Bouffard Damien, Chanudet Vincent, Dambrine Etienne, Guénand Yann, Harmel Tristan, Ibelings Bastiaan W, Trevisan Dominique, Uittenbogaard Rob, and Danis Pierre-Alain
- Subjects
Lake Geneva ,lakes ,3D modeling ,water quality ,water framework directive ,Aquaculture. Fisheries. Angling ,SH1-691 - Abstract
This study deals with the impact of spatio-temporal heterogeneities on the assessment of lake ecological status according to the European water framework directive (WFD). A method, based on three-dimensional coupled hydrodynamic and ecological modeling, is presented to assess the variability of lake ecological status, and to locate the most representative sampling station of Lake Geneva (France/Switzerland). Five variables used in the lake ecological status evaluation were simulated by using the free software Delft3D. The numerical simulation results showed that the simulated ecological status based on chlorophyll a and total phosphorus concentrations measured at the regulatory monitoring station depend on the choice of the sampling date. Results also indicated a strong spatial heterogeneity in ecological status that varies from “poor” to “good” along an East-West gradient. Finally, the numerical simulation results showed that the most representative point of a mean theoretical ecological quality for Lake Geneva would be located in the center of the upper basin, close to the historical sampling station.
- Published
- 2019
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