Response of extreme floods in the southwestern United States to climatic variations in the late Holocene

Special Issue. Geomorphic responses to short-term climatic change

Auteur(s) et Affiliation(s)



Description :
A regional synthesis of paleoflood chronologies on rivers in Arizona and southern Utah reveals that the largest floods over the last 5000 years cluster into distinct time periods that are related to regional and global climatic fluctuations. The flood chronologies were constructed using fine-grained slackwater deposits that accumulate in protected areas along the margins of bedrock canyons and selectively preserve evidence of the largest events. A positive relationship between the paleofloods and long-term variations in the frequency of El Niño events is evident over the last 1000 years.


Type de document :
Congrès

Source :
Symposium du Congrès International de Géomorphologie, 3, Hamilton, Canada, 1993, Geomorphology (Amsterdam), issn : 0169-555X, 1997, vol. 19, n°. 3-4, p. 175-201, Collation : Illustration, Références bibliographiques : 4 p.

Date :
1997

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier