Date post: | 04-Jan-2016 |
Category: |
Documents |
Upload: | collin-powell |
View: | 217 times |
Download: | 0 times |
THE ROLE OF DEBRIS FLOWS IN LONG TERM DENUDATION AND LANDSCAPE EVOLUTION
OF THE CENTRAL APPALACHIANS
L. Scott Eaton, Ph.D.L. Scott Eaton, Ph.D.Department of Geology and Environmental Department of Geology and Environmental
ScienceScienceJames Madison UniversityJames Madison University
Death Valley, CA
La Conchita, CA
Landslide: the downslope movement of rock, soil, or artificial fill under the influence of gravity.
Research Question:Research Question:
In the Appalachians, are debris flows a In the Appalachians, are debris flows a
significant process in the significant process in the transportation of transportation of
sediment from sediment from mountainous terrain to mountainous terrain to thethe
lowland floodplains?lowland floodplains?
What is the frequency of debris flows in the What is the frequency of debris flows in the Appalachians?Appalachians?
How much sediment is transported during an event?How much sediment is transported during an event?
What are the long term erosion (denudation) rates in What are the long term erosion (denudation) rates in the central Appalachians?the central Appalachians?
What are the dominant geomorphic processesWhat are the dominant geomorphic processesoperating within the basin?operating within the basin?
Summary of Basin Denudation of Blue Ridge Systems
Event
BasinBasin Area (km2)
Volume ofSediment Eroded
(m3)
Mean Basin
Denuda-tion (cm)
HurricaneCamilleNelson Co.
Willis Cove
4.08 173,488 4.3
HurricaneCamille,Nelson Co.
Ginseng Hollow
1.75 88,727 5.1
HurricaneCamille,Nelson Co.
Polly Wright Cove
2.47 87,707 3.6
Rapidan Flood,Madison Co.
Jenkins Hollow
0.398 13,364 3.4
Rapidan Flood
Teal Hollow 0.123 2,492 2.0
Long Term and Episodic Denudation
0
1
2
3
4
5
6
7
8
9
10
Nelson County Madison County
Den
ud
atio
n (
cm) Long Term
Episodic
3,500 Years 1 Day
2,500Years 1 Day
HurricaneCamille
RapidanStorm