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Evolution and Application of Instream Flow Methodologies to Small Hydropower Developments: An Overview of the Issues

Abstract
Methods for evaluating instream flow needs have evolved over the last 30 years resulting in two categories which are defined as 'standard-setting' and 'incremental.' Standard-setting methodologies refer to those measurement and interpretive techniques designed to generate a flow value(s) which is intended to maintain the fishery at some acceptable level. Incremental methodologies on the other hand are organized and repeatable processes by which: (1) a fishery habitat/streamflow relationship and the hydrology of the stream are transformed into a baseline habitat time series; (2) proposed water management alternatives are quantified and compared with the baseline; and (3) project operating rules are negotiated. A hierarchical approach to small-hydro instream flow analysis is suggested.
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article
Date
1985
Publisher
American Fisheries Society
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