Examines the mechanisms of natural riverine sediment production in the Northern River Basins Study area, together with the routine data for suspended sediment in the area's rivers, as background for the examination of sediment-associated contaminants. Topics examined include: the causative mechanisms and boundary conditions affecting the sediment regime, including area topography, geology, and hydrology; availability and adequacy of data on suspended sediments in the area; time trends of fluvial suspended sediment dynamics on a seasonal (open water and ice regime) and annual basis, over the long term, and in critical events; sediment sources, pathways, and fates, and sediment dynamics at basin-wide, reach, and site levels; sediment quality, including sediment-associated characteristics of pulp mill effluents and sediment-contaminant relationships; and implications for sediment-associated contaminants. Recommendations are made for monitoring and assessment of the sediment component of the area's ecosystem.

This book comprises the proceedings of the Annual Conference of the Canadian Society of Civil Engineering 2021. The contents of this volume focus on specialty conferences in construction, environmental, hydrotechnical, materials, structures, transportation engineering, etc. This volume will prove a valuable resource for those in academia and industry.

Presents the analytical results and spatial trends for the following contaminants in bottom sediment samples collected from northern Alberta rivers in 1994-95: polychlorinated dibenzo-p-dioxins, dibenzofurans, resin acids, polyaromatic hydrocarbons, chlorinated phenolics, polychlorinated biphenyls, extractable organic halides, toxaphene, and mercury. Sampling locations were chosen to provide broad coverage of both the Athabasca and Peace river basins, coverage of key mixing zones downstream from four pulp mills, and replication with locations sampled previously. The 1994-95 survey objectives included: determination of within-site variability in bottom sediment contamination; testing of the assumption that the sand fraction is not an important repository of contaminants; and providing a data set for comparison with earlier bottom sediment collections in 1988-89 and 1992.

"The transport characteristics of the fine sediment are essential parameters for modelling the transport, fate and bioaccumulation of contaminants in river systems. In this study, which was carried out for the Northern River Basins Study (NRBS), sediments from the Athabasca River near Hinton, Alberta were tested in the rotating flume and their transport parameters measured. A brief description of the experimental procedure and some significant results are presented in this report"--Abstract.