Phosphorus has been widely used to describe a water body’s trophic level. However, few efforts still exist to study the phosphorus dynamic of freshwater ecosystems in Indonesia by modeling. This study aims to build Patenggang Lake’s phosphorus dynamic model. Water samples were taken in June, July, and August 2022 with four sampling sites. Based on mixing potential, Patenggang Lake is a polymictic lake that frequently experiences entire water mixing from bottom to surface. Linear regression shows that the hypolimnion's primary key parameters are dissolved oxygen and alkalinity. On the other hand, secondary key parameters consist of dissolved oxygen in the epilimnion, rainfall, and wind speed. Model creation is based on primary and secondary vital parameters. The model was run to approximate the coming year's dissolved oxygen, alkalinity, and phosphorus data based on rainfall and average wind speed converted into climate typical. The simulation results show that the phosphorus dynamic is indirectly related to rainfall and wind speed fluctuations.
Wulandari et al. (Mon,) studied this question.