HR: 14:30h
AN: H23C-05    [Abstracts]
TI: Impact of Humans on the Flux of Terrestrial Sediment to the Global Coastal Ocean
AU: * Syvitski, J P
EM: syvitski@colorado.edu
AF: INSTAAR, University of Colorado,, Boulder, CO 80309-0450 United States
AU: Vorosmarty, C
EM: charles.vorosmarty@unh.edu
AF: ISEOS, University of NewHampshire, Durham, CO 03824 United States
AU: Kettner, A J
EM: kettner@colorado.edu
AF: INSTAAR, University of Colorado,, Boulder, CO 80309-0450 United States
AB: Global predictions are provided on the terrestrial flux of sediment, on a river-by-river basis, under Modern and pre-Anthropocene conditions. Sediment delivery is influenced basin characteristics, regional climate, and reservoirs. Pre-Anthropocene sediment flux was likely 15.5 BT/yr. Human activities have increased fluvial sediment erosion by 2.3 BT/yr. Modern delivery of sediment is presently 12.6 BT/yr, due to an estimated trapping of 100 BT of sediment behind reservoirs. Africa and Asia have greatly reduced sediment loads, Indonesia now delivers much more sediment. Seasonal patterns of sediment delivery are conditioned by precipitation patterns, snow-release periods, and human-influenced water release from reservoirs.
DE: 1803 Anthropogenic effects
DE: 1815 Erosion and sedimentation
DE: 1857 Reservoirs (surface)
DE: 1860 Runoff and streamflow
DE: 3022 Marine sediments--processes and transport
SC: Hydrology [H]
MN: 2005 Joint Assembly