Short-term changes in seafloor character due to flood derived hyperpycnal discharge: Typhoon Mindulle, Taiwan, July 2004
Resource
GEOLOGY,38(9),779-782.
Geology 35 (9): 779-782
Journal
Geology
Journal Volume
35
Journal Issue
9
Pages
779-782
Date Issued
2007
Author(s)
Abstract
During Typhoon Mindulle in early July 2004, the Choshui River (central-western Taiwan) discharged ∼72 Mt of sediment to the eastern Taiwan Strait; peak concentrations were ≥200 g/L, ∼35%-40% of which was sand. Box-core samples and CHIRP (compressed high-intensity radar pulse) sonar records taken just before and after the typhoon indicate that the hyperpycnal sediment was first deposited adjacent to the mouth of the Choshui, subsequently resuspended and transported northward (via the Taiwan Warm Current), and redeposited as a patchy coastal band of mud-dominated sediment that reached thicknesses of 1-2 m within megaripples. Within a month most of the mud was gone, probably continuing its northward transit, but more mud appeared in late August in response to Typhoon Aere. Following autumn and winter storms, the entire nearshore area was again sand dominated by early spring. © 2007 The Geological Society of America.
Subjects
Hyperpycnal; Seafloor; Taiwan; Typhoon
SDGs
Other Subjects
Hyperpycnal discharge; Hyperpycnal sediment; Patchy coastal band; Seafloor; Climate change; Coastal zones; Ocean currents; Sediment transport; Storms; discharge; resuspension; ripple; seafloor; sediment transport; typhoon; Asia; Choshui River; Eurasia; Far East; Taiwan; Taiwan Strait
Type
journal article
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