Instream Flow Incremental Methodology (IFIM)

The Instream Flow Incremental Methodology (IFIM) is a scientific approach used to determine the minimum water flow needed in a river or stream to sustain healthy ecosystems and support aquatic life. It involves assessing how different flow levels affect factors like habitat availability, fish populations, and water quality. By modeling these relationships, IFIM helps water managers decide on flow levels that balance ecological health with human needs, such as irrigation or hydroelectric power. Essentially, it provides a structured way to ensure streams have enough water to support their ecological functions while accommodating other demands.