NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Modeling fluvial erosion on regional to continental scalesThe fluvial system is a major concern in modeling landform evolution in response to tectonic deformation. Three stream bed types (bedrock, coarse-bed alluvial, and fine-bed alluvial) differ in factors controlling their occurrence and evolution and in appropriate modeling approaches. Spatial and temporal transitions among bed types occur in response to changes in sediment characteristics and tectonic deformation. Erosion in bedrock channels depends upon the ability to scour or pluck bed material; this detachment capacity is often a power function of drainage area and gradient. Exposure of bedrock in channel beds, due to rapid downcutting or resistant rock, slows the response of headwater catchments to downstream baselevel changes. Sediment routing through alluvial channels must account for supply from slope erosion, transport rates, abrasion, and sorting. In regional landform modeling, implicit rate laws must be developed for sediment production from erosion of sub-grid-scale slopes and small channels.
Document ID
19950048055
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Howard, Alan D.
(Univeristy of Virginia, Charlottesville, VA United States)
Dietrich, William E.
(Univeristy of California, Berkeley, CA United States)
Seidl, Michele A.
(Univeristy of California, Berkeley, CA United States)
Date Acquired
August 16, 2013
Publication Date
July 10, 1994
Publication Information
Publication: Journal of Geophysical Research
Volume: 99
Issue: B7
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
95A79654
Funding Number(s)
CONTRACT_GRANT: NAGW-1926
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available