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Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
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Meteolakes: An operational online three-dimensional forecasting platform for lake hydrodynamics.

Theo Baracchini1, Alfred Wüest2, Damien Bouffard3

  • 1Physics of Aquatic Systems Laboratory (APHYS) - Margaretha Kamprad Chair, ENAC, EPFL, 1015, Lausanne, Switzerland.

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Summary

Meteolakes.ch provides a user-friendly online platform for real-time lake data and 3D hydrodynamic simulations. This system aids scientists, policymakers, and the public in understanding and managing freshwater ecosystems.

Keywords:
3D hydrodynamicsData assimilationForecastingInformation disseminationLake modellingReal-time monitoring

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Area of Science:

  • Environmental science
  • Hydrology
  • Limnology

Background:

  • Environmental management requires accurate monitoring and interpretation of dynamic freshwater systems.
  • Lake ecosystems involve complex biogeochemical interactions influenced by physical processes like mixing and transport.
  • High-quality physical insight is crucial for effective lake management.

Purpose of the Study:

  • To present a unified approach for disseminating lake observations and 3D hydrodynamic simulations via a user-friendly online platform.
  • To bridge the gap between complex modeling and a broad audience, including scientists, the public, and governmental stakeholders.
  • To provide near real-time data, short-term forecasts, and data assimilation for freshwater systems.

Main Methods:

  • Development of meteolakes.ch, a scalable, modular, and distributed web-based platform.
  • Integration of local weather dynamics, regional anthropogenic stresses, and global environmental changes into the platform.
  • Open dissemination of lake observations and three-dimensional numerical simulations.

Main Results:

  • The platform has continuously provided timely synoptic lake information to over 250,000 users since 2016.
  • Demonstrated applications include analyzing upwelling and storm events, aiding scientific understanding and water management.
  • Facilitated guidance for field experiments, interdisciplinary studies, and policy planning.

Conclusions:

  • Meteolakes.ch successfully provides accessible and actionable insights into lake dynamics for diverse users.
  • The platform enhances scientific research, supports governmental water resource management, and promotes public awareness.
  • It serves as a valuable tool for understanding and responding to complex lake environmental events.