Assessing morphological adjustments of stream channels in the Piedmont region of Georgia, USA
Riley, Jeffrey William
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As part of a U.S. Geological Survey (USGS) study investigating the effects of altered flow on ecosystems in the Upper Flint River Basin information was needed regarding the stability of stream channels. This was to determine if ongoing channel adjustments could be of sufficient magnitude to mask the effects of hydrologic alteration and simultaneously use channel stability as a proxy for the persistence of in-stream habitat conditions. A combination of data analysis from USGS stream gage stations supported by field studies were used to evaluate channel adjustments. Results indicate that channels have been dynamic over the course of record. Some locations exhibited distinct trends of degradation while others appeared dynamically stable. It appears that local scale disturbances are more likely responsible, due to the discontinuous nature of channel adjustments, than watershed scale land cover changes.