Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
GSA Bulletin Don't get GSW? Talk to your librarian.
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
GSA Bulletin; December 2000; v. 112; no. 12; p. 1778-1786; DOI: 10.1130/0016-7606(2000)112<1778:TAUTOC>2.0.CO;2
© 2000 Geological Society of America
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Hooke, R. LeB.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Toward a uniform theory of clastic sediment yield in fluvial systems

Roger LeB. Hooke*,1

1 Department of Geological Sciences and Institute for Quaternary Studies, University of Maine, Orono, Maine 04469-5790, USA

Sediment is delivered to streams by creep, slope wash, rill and gully erosion, and collapse of oversteepened banks. The first three of these operate on all transport-limited slopes. Their efficacy varies directly with precipitation (or runoff) and inversely with vegetation cover. Sediment yield from these processes is also likely to increase with slope angle and, in the case of slope wash and rill erosion, with rainfall intensity and slope length.

Sloughing from oversteepened banks, however, occurs where rivers are actively cutting into valley sides. The frequency of occurrence of such locations increases with the mean slope angle, and the frequency of collapse increases with runoff. Thus, this process is likely to be dominant in mountainous areas with high runoff.

Expressing these effects analytically leads to a tentative general relation for specific sediment yield. If we had sufficient knowledge of the various parameters involved, this relation could be integrated over a basin to obtain the total yield. At present, however, its main value is to draw attention to the numerous assumptions implicit in many much simpler equations in common use.

Key Words: rivers • sediment yield • slopes • theory • watersheds




This article has been cited by other articles:


Home page
 Geological Society of America BulletinHome page
D. H. Mann and D. J. Meltzer
Millennial-scale dynamics of valley fills over the past 12,000 14C yr in northeastern New Mexico, USA
Geological Society of America Bulletin, November 1, 2007; 119(11-12): 1433 - 1448.
[Abstract] [Full Text] [PDF]

Home page
 Journal of Sedimentary ResearchHome page
H. R. Feldman, E. K. Franseen, R.M. Joeckel, and P. H. Heckel
Impact of Longer-Term Modest Climate Shifts on Architecture of High-Frequency Sequences (Cyclothems), Pennsylvanian of Midcontinent U.S.A.
Journal of Sedimentary Research, May 1, 2005; 75(3): 350 - 368.
[Abstract] [Full Text] [PDF]

Home page
 GeologyHome page
B. H. Wilkinson
Humans as geologic agents: A deep-time perspective
Geology, March 1, 2005; 33(3): 161 - 164.
[Abstract] [Full Text] [PDF]

Home page
 GeologyHome page
R. LeB. Hooke
Time constant for equilibration of erosion with tectonic uplift
Geology, July 1, 2003; 31(7): 621 - 624.
[Abstract] [Full Text] [PDF]

Home page
 The HoloceneHome page
C. K. Ballantyne and C. K. Ballantyne
A general model of paraglacial landscape response
The Holocene, April 1, 2002; 12(3): 371 - 376.
[Abstract] [PDF]


JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Geological Society of America