CGRG Bibliography of Canadian Geomorphology
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Author : Droppo, I.G.; and Stone, M .
Date : 1994
Title : In-channel surficial fine-grained sediment laminae; Part I, Physical characteristics and formational processes
Publication : Hydrological Processes.
Issue : 8(2):
Page(s) : 101-111
Abstract
An in-channel surficial depositional feature (surficial fine-grained laminae) composed of loosely bound fine sediment deposited during low flow conditions has often been observed in river systems in south-western Ontario. The physical characteristics of this feature have been determined by a direct observation image analysis system. This sediment consists primarily of flocculated fine-grained material. The size distributions of surficial fine-grained laminae and suspended sediment were not significantly different. Each distribution is bimodal in nature and shows a characteristic grain size deficiency in the 4-5 mu m size range. This observation suggests that flocculation and not low discharge or low competence is the dominant mechanism for the formation of surficial fine-grained laminae under conditions of low flow in fluvial systems of south-western Ontario. A quantitative assessment of this feature shows its potential importance as a source of fine-grained sediment and associated contaminants for downstream transport.
Bibliography of Canadian Geomorphology