Details of Grant 

EPSRC Reference:	GR/L02081/01
Title:	ENTRAINMENT OF GRADED SEDIMENT FROM WATER WORKED BEDS IN NON-EQUILIBRIUM TRANSPORT CONDITIONS
Principal Investigator:	McEwan, Dr I
Other Investigators:	Willetts, Professor B
Researcher Co-Investigators:
Project Partners:	University of Sheffield
Department:	Engineering
Organisation:	University of Aberdeen
Scheme:	Standard Research (Pre-FEC)
Starts:	07 October 1996	Ends:	06 October 1999	Value (£):	133,660
EPSRC Research Topic Classifications:	Coastal & Waterway Engineering
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:
Summary on Grant Application Form
The objective of this study is to perform a detailed examination of the physical factors which influence entrainment in graded sediments with particular emphasis on the role that the condition of the sediment surface has on entrainment. This will be accomplished through a programme of carefully designed flume experiments. There are three unique elements to this programme. Firstly the programme will examine entrainment from water worked sediment beds developed at flows different from the entraining flow. These will be an invaluable data set in assessing how the sediment system responds to changing flow rates. Secondly the programme will yield highly detailed texture maps of the waterworked sediment beds developed at different flows. These will provide an unique data source in assessing the influence of surface topography on entrainment. Thirdly experiments will be performed with a number of carefully controlled bimodal sediment mixes before progressing to continuous size distributions. This will greatly facilitate the identification of the key physical processes of mixed grain size entrainment which previously have either been neglected or obscured because of the complexities of interpreting continuous grain size distribution data. The outcome of the project will be an improved understanding of the physical mechanisms of entrainment in mixed grain size sediments which will lead to improvements in numerical models of sediment transport, by clarifying the hiding function concept.
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Organisation Website:	http://www.abdn.ac.uk