Studying the influence of the Chulyshman River waters on thermohydrodynamic processes of Lake Teletskoye in summer

The Chulyshman River influence on the formation of density stratification of Lake Teletskoye in summer is considered. The relevance of this problem is determined by the importance of studying the specific features of the processes of impurity and pollutant transfer under the conditions of thermocline and thermal bar formation and water renewal in the lake. The above-mentioned problems are solved using the mathematical modeling methods and field data. To consider thermohydrodynamic processes in deep Lake Teletskoye and the Chulyshman River, the computer models have been built based on the open Delft3D package. For the lake, it is an improved 3D model and for the flow of the Chulyshman River in its mouth - a planned (2DH) model. The conjugation of 3D and 2DH models was implemented at the inlet of Lake Teletskoye. Field observations of the spatial thermal structure of the reservoir were carried out in the summer-autumn months of 2010–2023. The main results of the work performed are as follows: the revealed complex picture of density stratification and density currents in Lake Teletskoye during the period of summer heating of the reservoir and driving factors of its formation, distribution features of the Chulyshman River waters within the lake in summer.