(regional curves) define naturally functioning channels, and provide the basis for natural 

 channel design. 



At the reach level, stream geomorphology is quantified in both project and 

 reference reaches. The reference reach should be naturally functioning, provide optimal 

 fish habitat, and serve as a model for the design channel. "BankfuU" indicators and other 

 geomorphic variables are measured in both reaches. Bankfull elevation, a geomorphic 

 indicator signifying the point of incipient flooding, coincides with the stage above which 

 the stream accesses its floodplain or flood-prone area (Rosgen 1996). By doing the work 

 that creates the average morphologic channel characteristics, bankfull discharge forms 

 and maintains the channel over time (Dunne and Leopold 1978). Channel pattern (plan 

 view characteristics), dimension (channel size and shape), and profile (longitudinal 

 elevations and gradients) are measured. Appropriate designs may include creating 

 aquatic habitat, prescribing a revegetation plan, and constructing an appropriate 

 floodplain. 



Synthesizing reference reach field data and incorporating regional stream 

 information helps identify design channel parameters. Regional data and dimensionless 

 ratios help predict channel attributes relative to the watershed area and bankfull 

 characteristics. Watershed discharge, sediment entrainment, and bankfull channel cross 

 sections are then hydraulically modeled to validate bankfull discharge. Design 

 dimensions are developed relative to bankfull discharge. Comparing design dimensions to 

 dimensionless ratios and a reference reach database further validates the design. 



The final restoration design seeks to mimic a stream in dynamic equilibrium with 

 its watershed, and to provide a diverse and complex channel capable of conveying flows, 

 transporting sediment, and integrating essential habitat features related to fish population 

 recovery goals. Vegetation colonization through mature shrub and sod mat transplanting, 

 as well as other revegetation efforts, along with woody materials and rock provide 

 immediate fish habitat and temporary bank stability. These structures allow for shrub 

 colonization which, when established, provides long-term channel stability and habitat 

 complexity. Proper land management is essential to the success of these methodologies. 

 Most restoration projects necessarily incorporate compatible grazing strategies and other 

 land management changes. 



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