EGU22-8439
https://doi.org/10.5194/egusphere-egu22-8439
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Three-dimensional simulation of biochemical processes in inland waters

Daria Gladskikh1,2,3, Evgeny Mortikov2,3,4, and Victor Stepanenko2,3
Daria Gladskikh et al.
  • 1Institute of Applied Physics of the Russian Academy of Sciences, Nonlinear geophysical processes department, Nizhny Novgorod, Russian Federation (daria.gladskikh@gmail.com)
  • 2Lomonosov Moscow State University, Research Computing Center, Russian Federation
  • 3Moscow Center of Fundamental and Applied Mathematics, Russian Federation
  • 4Institute of Numerical Mathematics, Russian Academy of Sciences, Moscow, Russian Federation

Within the framework of this study, a three-dimensional numerical model of biochemical processes was developed, which complements the model of thermohydrodynamics of the lake. The proposed model includes equations to describe the transport, diffusion, and reactions of dissolved gases. To compare the calculations with the measurement data, the bottom topography and atmospheric forcing were taken into account. For the flux of short-wave radiation, the parameterization of the extinction coefficient was implemented. To assess the contribution of density stratification and velocity shear to the processes of small-scale turbulence in lakes, a modification of the standard two-parameter k-epsilon closure was proposed. The basis of the parameterization is the model that reproduces mutual transformation of the kinetic and potential energy of turbulent pulsations.

The work was supported by the RFBR (20-05-00776), by Moscow Center of Fundamental and Applied Mathematics (agreement with the Ministry of Science and Higher Education 075-15-2019-1621), and by grant of the RF President’s Grant for Young Scientists (MD-1850.2020.5)

How to cite: Gladskikh, D., Mortikov, E., and Stepanenko, V.: Three-dimensional simulation of biochemical processes in inland waters, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-8439, https://doi.org/10.5194/egusphere-egu22-8439, 2022.