Modeling and analysis of the polluted lakes system with various fractional approaches

The purpose of this paper is to investigate the dynamics of the polluted lakes system through fractional derivative approach in the sense of fractal-fractional operator. Initially, we derive the model based on the assumptions and then apply the fractal-fractional operator. The model with fractal-fractional approach in the sense of Atangana-Baleanu derivative is considered. When, choosing the fractal order one we obtain fractional order, and when choosing the fractional order one a fractal system is obtained. Considering both the operators together we present a model with fractal-fractional. We present a novel numerical approach to solve the fractal-fractional system and then present the existence and uniqueness results for the system. We present various graphical results for the fractal and fractional operators and also for the fractal-fractional orders. The graphical results reveals the significance of the new operator to a practical problem in a better way. (C) 2020 Elsevier Ltd. All rights reserved.