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Title: Variations in sediment sources and yields in the Finger Lakes and Catskills regions of New York
Authors: Nagle, Gregory N.
Fahey, Timothy J.
Ritchie, Jerry C.
Woodbury, Peter B.
Keywords: bank erosion
sediment sources
New York State
Issue Date: 2007
Publisher: John Wiley & Sons Ltd.
Citation: Nagle,G.N., T.J. Fahey, J.C. Ritchie, and P.B. Woodbury. 2007. Variations in sediment sources and yields in the Finger Lakes and Catskills regions of New York. Hydrological Processes 21(6): 828-838.
Abstract: The proportional contributions of stream bank and surface sources to fine sediment loads in watersheds in New York State were quantified with uncertainty analysis. Eroding streamside glacial drift, including glaciolacustrine deposits, were examined to help explain variations in the proportional contributions made by bank erosion. Sediment sources were quantified by comparing concentrations of the bomb-derived radionuclide 137Cs in fluvial sediment with sediment from potential source areas such as agricultural soils, forest soils and stream banks. To compare sediment sources in streams containing abundant deposits of fine-grained glacial drift with watersheds that lacked moderate or extensive streamside deposits, samples were taken from 15 watersheds in the region. The mean contribution of bank erosion to sediment loads in the six streams with glaciolacustrine deposits was 60% (range 46?76%). The proportional contribution of bank erosion was also important in one stream lacking glaciolacustrine deposits (57%) but was less important in the remainder, with contributions ranging from 0 to 46%. Data from this study on the varying contributions of bank erosion and data from past studies of sediment yield in 15 watersheds of New York State suggest that eroding streamside glacial deposits dominate sediment yield in many watersheds. In other watersheds, past impacts to streams, such as channelization, have also resulted in high levels of bank erosion.
ISSN: 0885-6087
Appears in Collections:Natural Resources - Monographs, Papers and Research

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