The Development of Bankfull Hydraulic Geometry Relationships for Streams of the Georgia Coastal Plain
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Bankfull hydraulic geometry relationships, also known as regional curves, relate bankfull stream channel dimensions to watershed drainage area. Established regional curves are important to channel assessment and stream restoration efforts as they can confirm identification of bankfull stage and channel dimension in ungaged watersheds and help estimate the appropriate bankfull dimension and discharge for natural channel designs. In Georgia, stream restoration for mitigation purposes relies heavily on the use of natural channel design. This paper describes results of bankfull hydraulic geometry relationships developed for streams of Georgia’s Coastal Plain and how the curve is being used for stream restoration purposes within Georgia. The relationships based on Georgia streams will be compared to relations from other Southeastern State coastal plains, in an effort to compliment and extend regional relationships. Results of this study will be discussed with particular attention to issues relevant to coastal stream restoration processes in the state of Georgia.