What does ecological flow refer to?

Ecological flow refers to the minimum flow required to maintain the health and sustainability of an aquatic ecosystem. This flow is crucial for supporting various ecological functions, such as the survival of fish and other aquatic organisms, nutrient cycling, and habitat integrity. It ensures that the water body maintains a quality that supports life, including appropriate temperature, oxygen levels, and the natural habitat structure necessary for organisms to thrive.

In contrast, the maximum flow during flood events does not pertain to ecological sustainability, as it can often disrupt ecosystems rather than support them. The average flow throughout the year may not be sufficient to meet the specific ecological needs, as ecosystems often require certain minimum levels at critical times. Seasonal variation impacts water availability in different contexts but does not specifically address the needs for maintaining ecosystem health. Thus, identifying the minimum flow necessary for ecosystem maintenance is central to the concept of ecological flow.