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Title
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Assessment of bancs and streambank erosion rates in the northwest Florida Panhandle.
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Author
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Finch, Bryce Douglas
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Abstract/Description
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A previous study performed in the Northwest Florida Panhandle found the bank assessment of non-point source consequences of sediment (BANCS) model to be a relatively poor predictor of streambank erosion rates. Concern for whether these errors were related to how the project was constructed prompted the need for additional research. Some of the presumed errors were associated with the size of the study area and sites' exposure to extreme weather events during the study period. This study aims...
Show moreA previous study performed in the Northwest Florida Panhandle found the bank assessment of non-point source consequences of sediment (BANCS) model to be a relatively poor predictor of streambank erosion rates. Concern for whether these errors were related to how the project was constructed prompted the need for additional research. Some of the presumed errors were associated with the size of the study area and sites' exposure to extreme weather events during the study period. This study aims to utilize the BANCS model across a smaller study area than previously practiced with a focus on identifying specific flow events and drainage watersheds that are primarily undeveloped. Flow events were identified through the use of constructed gages and watersheds were verified with aerial imagery. Erosion incurred at the 18 study sites selected was measured over a given year following identified flood and bankfull events. These practices resulted in an improvement of BANCS' ability to predict streambank erosion rates. In particular, the bank erosion hazard index (BEHI) demonstrates strong relationships with erosion rates when plotted independently. The findings of the study indicate that a better understanding of return intervals of specific flow events, such as bankfull and floods, would enhance the capability to predict streambank erosion.
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Date Issued
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2020, 2020
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Identifier
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1232475100, WFE0000738
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Format
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Document (PDF)
