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Gravel-bed river floodplains are dynamic landscapes that support a high level of ecosystem biocomplexity and biodiversity in large part because of the continual physical turnover of habitat. We evaluated the potential of a gravel-bed river to do geomorphic work on a series of floodplains below a dam by linking airborne hyperspectral imagery with corresponding groundtruth measures of flow velocity, water depth, floodplain surface topography, and vegetative cover. These data were analyzed in a geographic information system to map the spatial distribution of potential stream power over a range of discharge regimes. Nodes of flow separation at specific discharges that...

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