Author(s): Scott Mcbain; William Trush

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Abstract: A variety of approaches have been used to address instream flow needs of riverine ecosystems, the most common include Instream Flow Incremental Methodology (Stalnaker et al., 1994), flushing flows (see Reiser et al., 1989 for discussion), and channel maintenance flows (e.g., USFS, 1984). To date, no standardized methodology has taken a comprehensive, interdisciplinary assessment of a riverine ecosystem, usually because the interrelationships between geomorphology and biology are many and complex. As a result, managers have rarely adopted a geomorphic approach in biological restoration for creating and maintaining the riverine ecosystem (Ligon et al., 1995). In this paper, we make explicit the inter-relationships between the physical system, human manipulation, and habitat conditions in four stages of the Tuolumne River ecosystem: Supply, Process, Form, and Biology (Figure 1). We then discuss how flow and sediment management can restore many crucial fluvial processes that create and maintain high quality salmonid habitat.

DOI:

Year: 1997