Abstract
An outburst flood from a failed beaver dam occurred in September, 1987, in Oglethorpe County, Georgia. The flood event tilted, scarred, and traumatized trees along the banks of Millstone Creek. Dendrogeomorphological techniques were employed to verify that the flood event was recorded in the annual rings of these trees, and to produce an index cutoff value for ring responses. Because of its recency, a very high number of sampled tree-rings recorded the flood; however, older floods are less likely to be so strongly recorded in the sampled trees, diminishing the usefulness of the index value concept. An alternative approach used consecutive-year ring responses, from which consecutive-year tree-ring index numbers were calculated. A consecutive index value of > c.45% can be used to invoke past occurrence of flood events.
Recommended Citation
Schipke, Katherine A. and Butler, David R.
(1991)
"The Use of Dendrogeomorphic Techniques to Date a BeaverDam Outburst Flood in Oglethorpe County, Georgia,"
The Geographical Bulletin: Vol. 33:
Iss.
2, Article 3.
Available at:
https://digitalcommons.kennesaw.edu/thegeographicalbulletin/vol33/iss2/3