What is one of the zones found in a facultative pond?

A facultative pond is designed to treat wastewater through natural biological processes, and it typically contains distinct zones that facilitate this treatment. The aerobic zone is one of the primary zones found in a facultative pond.

This zone exists near the surface of the water, where sunlight penetrates and promotes photosynthesis by aquatic plants and algae. In this aerobic zone, oxygen levels are high due to both the photosynthetic activity and the diffusion of atmospheric oxygen into the water. This high oxygen concentration supports aerobic microorganisms that are essential for breaking down organic material in the wastewater.

The presence of this zone is crucial for effective wastewater treatment, as it enhances the biological degradation of pollutants and helps maintain a healthier environment within the pond. In contrast, other zones, such as a deoxygenated zone, would typically occur deeper in the pond where oxygen levels are insufficient to support aerobic processes, leading to anaerobic conditions instead.