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Please use this identifier to cite or link to this item: http://hdl.handle.net/10023/3016
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Title: Channel and floodplain change analysis over a 100-year period : Lower Yuba River, California
Authors: Ghoshal, S.
James, L.A.
Singer, Michael B.
Aalto, R.
Keywords: Fluvial geomorphology
Change detection
Channel migration
DEM differencing
Hydraulic mining sediment
Floodplain morphology
GB Physical geography
Issue Date: 19-Jul-2010
Citation: Ghoshal , S , James , L A , Singer , M B & Aalto , R 2010 , ' Channel and floodplain change analysis over a 100-year period : Lower Yuba River, California ' Remote Sensing , vol 2 , no. 7 , pp. 1797-1825 .
Abstract: Hydraulic gold mining in the Sierra Nevada, California (1853–1884) displaced ~1.1 billion m3 of sediment from upland placer gravels that were deposited along piedmont rivers below dams where floods can remobilize them. This study uses topographic and planimetric data from detailed 1906 topographic maps, 1999 photogrammetric data, and pre- and post-flood aerial photographs to document historic sediment erosion and deposition along the lower Yuba River due to individual floods at the reach scale. Differencing of 3 × 3-m topographic data indicates substantial changes in channel morphology and documents 12.6 × 106 m3 of erosion and 5.8 × 106 m3 of deposition in these reaches since 1906. Planimetric and volumetric measurements document spatial and temporal variations of channel enlargement and lateral migration. Over the last century, channels incised up to ~13 m into mining sediments, which dramatically decreased local flood frequencies and increased flood conveyance. These adjustments were punctuated by event-scale geomorphic changes that redistributed sediment and associated contaminants to downstream lowlands.
Version: Publisher PDF
Status: Peer reviewed
URI: http://hdl.handle.net/10023/3016
DOI: http://dx.doi.org/10.3390/rs2071797
ISSN: 2072-4292
Type: Journal article
Rights: © 2010 by the authors; licensee MDPI, Basel, Switzerland. This article is an Open Access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
Appears in Collections:Earth and Environmental Sciences Research
University of St Andrews Research



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