Mathematical simulation of heat flux effects on plankton dynamics in early spring in Lake Dolgoe, Belarus
B.O. Tsydenov1, N.Yu. Sukhovilo2, A.A. Bart1, D.V. Degi1, N.S. Trunov1, A.Yu. Karpaeva3
1National Research Tomsk State University, Tomsk, Russia
2Belarusian State University, Minsk, Republic of Belarus
3State Scientific and Production Association "Scientific and Practical Center for Bioresources of the National Academy of Sciences of Belarus", Minsk, Republic of Belarus
Keywords: heat flux, numerical simulation, plankton, thermal bar, Lake Dolgoe
Abstract
Effects of heat flux during the early spring plankton vegetation period in Lake Dolgoe (Belarus) were studied based on a coupled mathematical model which reproduces thermohydrodynamic and hydrobiological processes in a freshwater lake. Calculations were performed under different values of heat flux which interacted with the water surface. The simulations showed the following: with increased insolation, which contributed to the intensive spread of inflow waters with a low content of organic matter into the lake, the concentrations of plankton decreased from the surface to some depth, and below that depth they again increased. It was also found that those depths were different for phyto- and zooplankton in the deepest part of the lake (18 m and 15 m, respectively).
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