Rainfall thresholds for triggering a debris avalanching event in the southern Appalachian Mountains. Neary, D. G. Pages 81-92 in J, 1987. Paper abstract bibtex In November 1977, a storm system produced intense rainfall that set off debris avalanching in steep terrain of the Pisgah National Forest, North Carolina. All the classical conditions of above normal antecedent moisture, heavy rainfall followed by intense downpours, steep slopes, and shallow soils were present. Peak hourly rainfall intensities of 90 to 100 mm/hr approach the suggested 24-hr threshold for initiating debris avalanches in mountainous regions and were the key to triggering these slope failures in well-drained and highly permeable forest soils of the Southern Appalachians. Long-return periods of 100 to more than 200 yr for destructive events obscure the perception of their importance as an erosional process. Although slope stability is not recognized as a general problem in mountainous areas of the East, debris avalanching is a major contributor to long-term erosion rates and influences formation of some of the more productive forest soils.
@article{neary_rainfall_1987,
title = {Rainfall thresholds for triggering a debris avalanching event in the southern {Appalachian} {Mountains}.},
url = {http://cwt33.ecology.uga.edu/publications/623.pdf},
abstract = {In November 1977, a storm system produced intense rainfall that set off debris avalanching in steep terrain of the Pisgah National Forest, North Carolina. All the classical conditions of above normal antecedent moisture, heavy rainfall followed by intense downpours, steep slopes, and shallow soils were present. Peak hourly rainfall intensities of 90 to 100 mm/hr approach the suggested 24-hr threshold for initiating debris avalanches in mountainous regions and were the key to triggering these slope failures in well-drained and highly permeable forest soils of the Southern Appalachians. Long-return periods of 100 to more than 200 yr for destructive events obscure the perception of their importance as an erosional process. Although slope stability is not recognized as a general problem in mountainous areas of the East, debris avalanching is a major contributor to long-term erosion rates and influences formation of some of the more productive forest soils.},
journal = {Pages 81-92 in J},
author = {Neary, D. G.},
year = {1987},
keywords = {CWT}
}
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