Determining the amount of water needed in a stream or river to support healthy ecosystem functions is an important and complex process. Balancing the needs for water (irrigation, drinking water, power production, etc.) with instream uses (recreation, biota, water quality, aesthetics, etc.) can be challenging. At Trutta Environmental Solutions, we have extensive experience with instream flow, including sampling the river system at multiple discharge rates and modeling the results to provide better flow management.