Application of New Approaches to Instream Flow: Use of Two-Dimensional Modeling and Habitat-Use Guilds in a Southeastern Stream
Leonard, Paul M.
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Recent advances in the field of instream flow were applied to address the site-specific challenges encountered while conducting a study on Swift Creek, North Carolina. A two-dimensional hydraulic model was used to simulate the complex hydraulic features of the stream. A habitat modeling procedure was used to calculate usable aquatic habitat at varying stream flows by relating hydraulic simulations and substrate/cover data to guild-based habitat suitability criteria. Guild-based habitat suitability criteria representing groups of species that utilize similar habitats were developed in consultation with resource agencies to more fully represent the range of habitats important to Swift Creek’s diverse fish and macroinvertebrate assemblage. Results of the study will be used to evaluate the effect of alternative aquatic base flow regimes on the biota and instream habitats of Swift Creek.