Performance Assessment of a 3D Hydrodynamic Model Using High Temporal Resolution Measurements in a Shallow Urban Lake

Soulignac, Frédéric; Vinçon‐Leite, Brigitte; Lemaire, Bruno J.; Martins, José Rodolfo Scarati; Bonhomme, Céline; Dúbois, Philippe; Mezemate, Yacine; Tchiguirinskaia, Ioulia; Schertzer, D.; Tassin, Bruno

doi:10.1007/s10666-017-9548-4

Cited by 37 publications

(40 citation statements)

References 18 publications

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“…The open source Delft3D software (version 4.03.00) used in this study has been applied to lakes of different sizes all around the world (Chanudet et al, 2012;Kacikoc and Beyhan, 2014;Razmi et al, 2013;Soulignac et al, 2017). Delft3D is composed of a 3D hydrodynamic and a 3D water quality modules.…”

Section: Modelingmentioning

confidence: 99%

Contribution of 3D coupled hydrodynamic-ecological modeling to assess the representativeness of a sampling protocol for lake water quality assessment

Soulignac¹,

Anneville²,

Bouffard³

et al. 2019

Knowl. Manag. Aquat. Ecosyst.

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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.

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Section: Modelingmentioning

confidence: 99%

Contribution of 3D coupled hydrodynamic-ecological modeling to assess the representativeness of a sampling protocol for lake water quality assessment

Soulignac¹,

Anneville²,

Bouffard³

et al. 2019

Knowl. Manag. Aquat. Ecosyst.

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“…The open source Delft3D software used in this study has been widely applied for lakes of different sizes all around the world (Chanudet et al, 2012;Kacikoc and Beyhan, 2014;Li et al, 2015;McCombs et al, 2014;Soulignac et al, 2017;Wahl and Peeters, 2014). A previous modelling effort was performed on Lake Geneva by using Delft3D.…”

Section: Delft3d Modelmentioning

confidence: 99%

“…At least five other 3D lake models including modeling of the water temperature were created using the open source Delft3D software: Lake Geneva in France/Switzerland (Razmi et al, 2017(Razmi et al, , 2014(Razmi et al, , 2013, Lake Constance in Switzerland/Germany/Austria (Wahl and Peeters, 2014), Lake Egirgir in Turkey (Kacikoc and Beyhan, 2014), Nam Theun 2 reservoir in Laos (Chanudet et al, 2012) and Lake Créteil in France (Soulignac et al, 2017). All these five models along with our proposed model, were validated using in situ measurements and proved to perform satisfactory, capable of accurately simulating the hydrodynamic and thermal structure of these lakes and proved to be ready to be used for research questions, for example climate research (Wahl and Peeters, 2014).…”

Section: Model Performancementioning

confidence: 99%

Using 3D modeling and remote sensing capabilities for a better understanding of spatio-temporal heterogeneities of phytoplankton abundance in large lakes

Soulignac

Danis

Bouffard

et al. 2018

Journal of Great Lakes Research

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Lake biological parameters show important spatio-temporal heterogeneities. This is why explaining the spatial patchiness of phytoplankton abundance has been a recurrent ecological issue and is an essential prerequisite for objectively assessing, protecting and restoring freshwater ecosystems. The drivers of these heterogeneities can be identified by modeling their dynamics. This approach is useful for theoretical and applied limnology. In this study, a 3D hydrodynamic model of Lake Geneva (France/Switzerland) was created. It is based on the Delft3D suite software and includes the main tributary (Rhône River) and two-dimensional high-resolution meteorological forcing. It provides 3D maps of water temperature and current velocities with a 1 h time step on a 1 km horizontal grid size and with a vertical resolution of 1 m near the surface to 7 m at the bottom of the lake. The dynamics and the drivers of phytoplankton heterogeneities were assessed by combining the outputs of the model and chlorophyll-a concentration (Chl-a) data from MERIS satellite images between 2008 and 2012. Results highlight physical mechanisms responsible for the occurrence of seasonal hot-spots in phytoplankton abundance in the lake. At the beginning of spring, Chl-a heterogeneities are usually caused by an earlier onset of phytoplankton growth in the shallowest and more sheltered areas; spatial differences in the timing of phytoplankton growth can be explained by spatial variability in thermal stratification dynamics. In summer, transient and locally higher phytoplankton abundances are observed in relation to the impact of basin-scale upwelling.

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“…algae growth, sedimentation, mineralization, etc.) in lakes [27,28]. The statistical models are relatively more accessible and more rapid for operational short-term applications.…”

Section: Future Outlooks Of the High-frequency Monitoring Systemmentioning

confidence: 99%

An Automatic Monitoring System for High-Frequency Measuring and Real-Time Management of Cyanobacterial Blooms in Urban Water Bodies

et al. 2018

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Urban lakes mitigate the negative impacts on the hydrological cycle and improve the quality of life in cities. Worldwide, the concern increases for the protection and management of urban water bodies. Since the physical-chemical and biological conditions of a small aquatic ecosystem can vary rapidly over time, traditional low frequency measurement approaches (weekly or monthly sampling) limits the knowledge and the transfer of research outcomes to management decision-making. In this context, this paper presents an automatic monitoring system including a full-scale experimental site and a data transfer platform for high-frequency observations (every 5 min) in a small and shallow urban lake (Lake Champs-sur-Marne, Paris, France, 10.3 ha). Lake stratification and mixing periods can be clearly observed, these periods are compared with the dynamic patterns of chlorophyll-a, phycocyanin, dissolved oxygen and pH. The results indicate that the phytoplankton growth corresponds with dissolved oxygen cycles. However, thermal stratification cannot totally explain the entire dynamic patterns of different physical-chemical and ecological variables. Besides, the cyanobacteria is one of the dominating groups of phytoplankton blooms during the lake stratification periods (8 August-29 September 2016). During the cooling mixed period (29 September-19 October 2016), the high concentration of chlorophyll-a is mainly caused by the other phytoplankton species, such as diatoms. Perspectives are discussed in order to apply this observation system for real-time management of water bodies and lakes.

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Performance Assessment of a 3D Hydrodynamic Model Using High Temporal Resolution Measurements in a Shallow Urban Lake

Cited by 37 publications

References 18 publications

Contribution of 3D coupled hydrodynamic-ecological modeling to assess the representativeness of a sampling protocol for lake water quality assessment

Contribution of 3D coupled hydrodynamic-ecological modeling to assess the representativeness of a sampling protocol for lake water quality assessment

Using 3D modeling and remote sensing capabilities for a better understanding of spatio-temporal heterogeneities of phytoplankton abundance in large lakes

An Automatic Monitoring System for High-Frequency Measuring and Real-Time Management of Cyanobacterial Blooms in Urban Water Bodies

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