Philip J. Ashworth, Sean J. Bennett, Jim Best, Stuart McLelland
List of Contributors. Acknowledgements. Coherent Flow Structures in Smooth-wall Turbulent Boundaary Layers: Facts, Mechnaisms and Speculations (C. Smith). Generalized Scaling of Coherent Bursting Structures in the Near-wall Region of Turbulent Flow over Smooth and Rough Boundaries (A. Grass and M. M...
Philip J. Ashworth, Jim Best, Julie E. Roden, Charles Bristow et al.
The initiation and evolution of a kilometre‐scale, sand braid‐bar was monitored during a 28‐month survey period from 1993 to 1996 in one of the world’s largest braided rivers, the Jamuna River, Bangladesh. Repeated bathymetric surveys through two monsoon flood seasons, combined with bar‐top surveys ...
Jim Best, Philip J. Ashworth, Charlie S. Bristow, Julie E. Roden
Abstract The three-dimensional subsurface alluvial architecture of a large (approximately 3 km long, 1 km wide, 12 m high), mid-channel sand braid bar in the Jamuna River, Bangladesh is described. Evolution of the bar and its depositional characteristics are assessed from a unique combination of gro...
Jim Best, Philip J. Ashworth, Maminul Haque Sarker, Julie E. Roden
This chapter contains sections titled: Background Channel Scale Morphology and Historical Changes in the Course of the Brahmaputra-Jamuna River Bedform Types and Dynamics Bifurcations, Offtakes and Confluences Floodplain Sedimentation Sedimentology of the Jamuna River Applied Geomorphology and Engin...
Stuart McLelland, Philip J. Ashworth, Jim Best, Julie E. Roden et al.
Detailed vertical profiles of time-averaged flow velocities and sediment concentration were taken during three periods of mid-channel bar development in the Jamuna River, Bangladesh. Bar growth was initiated downstream from a major flow convergence and generated a bar 4 km long and 1 km wide in a ch...
Jim Best, Philip J. Ashworth, E. Mosselman, Maminul Haque Sarker et al.
Bangladesh is dominated by three great rivers – the Jamuna–Brahmaputra, Ganga, and Meghna – that combine to feed sediment into one of the World's largest deltas in the Bay of Bengal. The Jamuna River has developed in a region of significant tectonic activity associated with Himalayan uplift and deve...
Charlie S. Bristow, Jim Best, Philip J. Ashworth
A large (2 km X 1 km) sand bar has been surveyed using ground penetrating radar (GPR), augmented by vibracoring and trenching, to investigate the sedimentary structures and three-dimensional alluvial architecture. Around 8 Km of GPR profiles were collected with nine survey lines running transversely...
Charlie S. Bristow, Jim Best, Philip J. Ashworth
A large (2 km X 1 km) sand bar has been surveyed using ground penetrating radar (GPR), augmented by vibracoring and trenching, to investigate the sedimentary structures and three-dimensional alluvial architecture. Around 8 Km of GPR profiles were collected with nine survey lines running transversely...
Philip J. Ashworth, JL Best, Julie E. Roden, C.R. Bristow