Journal article
The generation of turbidity currents by subaerial debris flows, California
Geological Society of America bulletin, Vol.101(2), pp.278-291
02/1989
DOI: 10.1130/0016-7606(1989)101<0278:TGOTCB>2.3.CO;2
Abstract
An integrated process study was carried out in the San Dimas Experimental Forest and adjoining reservoirs in the San Gabriel Mountains near Los Angeles. The initiation, movement, and dynamics of subaerial debris flows emanating from a series of experimentally burned watersheds, along with the subsequent movement of these flows subaqueously in two reservoirs, were studied using a network of instrumentation in addition to stratigraphy and mapping. Newly designed density sensors provided a continuous record of sediment concentration within the subaerial debris flows. These flows reached sediment concentrations of 60% by weight and velocities of 4-8 m s (super --1) , and they involved total sediment volumes ranging from several hundred to several thousand cubic meters. In terms of processes within the reservoirs, the study documents the ability of the flows to move substantial distances as subaqueous debris flows, to convert to turbidity currents by means of subaqueous hydraulic jumps, and to then move along the reservoir floor as turbidity currents. The findings illustrate the ability of the hydraulic jumps to control the location of sediment deposition.--Modified journal abstract.
Details
- Title: Subtitle
- The generation of turbidity currents by subaerial debris flows, California
- Creators
- Frank H Weirich - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Geological Society of America bulletin, Vol.101(2), pp.278-291
- Publisher
- Geological Society of America (GSA)
- DOI
- 10.1130/0016-7606(1989)101<0278:TGOTCB>2.3.CO;2
- ISSN
- 0016-7606
- eISSN
- 1943-2674
- Language
- English
- Date published
- 02/1989
- Academic Unit
- Civil and Environmental Engineering; Earth and Environmental Sciences
- Record Identifier
- 9984229179502771
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