NDLI: The use of$^{7}$Be and$^{210}$Pb$_{xs}$ to differentiate fine suspended sediment sources in South Slough, Oregon

Content Provider	Springer Nature Link
Author	Wilson, Christopher G. Matisoff, Gerald Whiting, Peter J.
Copyright Year	2007
Abstract	Suspended sediment was collected in the South Slough, National, Estuarine Research Reserve, Oregon, over 8 tidal cycles during and following a single runoff event. The sediment was analyzed for its radionuclide signature to determine the relative contributions of different sources of sediment to the efflux from the estuary. Suspended sediment in the estuary is a mixture of sediment from three potential sources: the river system, Coos Bay, and the estuarine bed. Each source material has a distinctive$^{7}$Be:$^{210}$Pb$_{xs}$ ratio. The ratios of the source sediments decreased, in magnitude in the following order: riverine >bay>bed. The ratios, of the suspended sediment collected within a subsection of the South Slough estuary reflected the relative mixture of the source areas. The$^{7}$Be:$^{210}$Pb$_{xs}$ ratios provided a means of not only differentiating, between resuspended bed sediment and freshly delivered sediment from both the river system and Coos Bay, but also calculating the relative amount of resuspended bed sediment in the suspended sediment collected in the estuary. The sampled subsection of the South Slough estuary was a net sink of sediment during a 100-h sampling period associated with the runoff event, but the radionuclide analysis suggests that approximately 39% of the sediment efflux was resuspended bed sediment.
Starting Page	348
Ending Page	358
Page Count	11
File Format	PDF
ISSN	15592723
Journal	Estuaries
Volume Number	30
Issue Number	2
e-ISSN	15592731
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environment Ecology Geosciences Freshwater & Marine Ecology Environmental Management Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics

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