CGRG Bibliography of Canadian Geomorphology
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Author : Attard, M.; Venditti, J.; and Church, M.
Date : 2011.
Title : Progress towards acoustic suspended sediment transport monitoring: Fraser River, BC.
Publication : 2011 Annual Meeting of the Western Division of the Canadian Association of Geographers. March 10-12, 2011. Simon Fraser University, Burnaby, BC.
Issue :
Page(s) :
Abstract
The sediment budget of the Lower Fraser River provides a long-term perspective of the net changes in channels and in sediment delivery to Fraser Delta. The budget is based on historical sediment rating curves developed from data collected between 1965 and 1986 by the Water Survey of Canada. Dredging of navigation channels is altering the sediment rating curves. Here we explore the possibility re-establishing the sediment monitoring program using hydro-acoustics. We evaluate the use of a 300 kHz sidelooking acoustic Doppler current profiler (ADCP), mounted just downstream of the sand-gravel transition at Mission, for continuous measurement of suspended sediment transport. This is accomplished by correlation of acoustic backscatter and acoustic attenuation with water-sediment samples collected using conventional bottle sampling methods with a P63-sampler. These calibrated signals will be used to examine the 2010 sedigraph by calculating daily and annual sediment flux into the Fraser Estuary and to the delta front. The research will provide a methodology that is continuous, precise, and replaces the need for traditional labour intensive sampling techniques.
Bibliography of Canadian Geomorphology