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Discontinuous ephemeral streams

Special Issue. Geomorphic responses to short-term climatic change

Auteur(s) et Affiliation(s)

BULL, W.B.
Geosciences Dep., Univ. Arizona, Tucson, Etats-Unis
KOCHEL, R.C.
Dep. Geology, Indiana Univ.-Purdue Univ., Indianapolis, Etats-Unis


Description :
Many ephemeral streams in western North America flowed over smooth valley floors before transformation from shallow discontinuous channels into deep arroyos. These inherently unstable streams of semiarid regions are sensitive to short-term climatic changes, and to human impacts, because hillslopes supply abundant sediment to infrequent large streamflow events. Discontinuous ephemeral streams appear to be constantly changing as they alternate between 2 primary modes; either aggradation or degradation may become dominant. Attainment of equilibrium conditions is brief.


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. 227-276, Collation : Illustration, Références bibliographiques : 3 p.

Date :
1997

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

Langue :
Anglais
Droits :
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