Abstract
Various independent sets of data are used to investigate near-surface suspended sediment concentrations. The data include satellite (LANDSAT) imagery, field verification and near-synoptic surveys of specific areas and integrated, longer-term, surveys of the Channel. The information is used to identify areas of high turbidity, which relate to tidal and wave resuspension of the mobile sediments within the Estuary and Channel system. Thematic maps produced from the satellite imagery are comparable directly with the survey results and are combined with them, through a radiance/loge concentration relationship. Derived estimates of material present within the waters of the Channel range from 4.5 × 106 t to 13.4 × 106 t. Fluvial contributions are estimated to be of the order of 1.6 × 106 t/yr. Other evidence is available for the supply of material from the Celtic Sea. Isopleths of suspended sediment concentration are used to infer residual water and fine-grained sediment transport directions; these are compared with a more general model, which includes observed and predicted near-bed sand transport directions.Key words: Bristol Channel, Severn Estuary, suspended sediment, satellite imagery, sediment budget, sediment transport, residual water movement
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Canadian Journal of Fisheries and Aquatic Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
