Modelling of Thermal Stratification and Ice Dynamics with Application to Lake Teletskoye, Altai Republic, Russia

Numerical modelling of ice growth and transport of matter in lakes, estuaries, or coastal seas can provide crucial input for improving the environment. In this paper, the goal is to model the thermal stratification and ice dynamics in Lake Teletskoye, which is located in the Altai republic of Russia. Lake Teletskoye is a deep lake with a maximum depth of 325 m. The Delft3D modelling suite is applied for simulation of the temperature stratification and the ice formation in Lake Teletskoye, which is the first Delft3D application of ice melt and growth in a deep lake. Modelling deep lakes requires a special approach for the computation of the density. In Delft3D the UNESCO equation is applied, which is less suitable for deep lakes. Therefore, Delft3D has been extended with the TEOS-10 and the Chen-Millero density formulas, which yield accurate model results for Lake Teletskoye.