Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events

Scour evolution and propagation around a cylinder in natural cohesive sediment was uniquely investigated under multi-flow event varying sequentially by velocity magnitudes. This flume study differs from others that only used test sediment with commercially available clays for single flow. The object...

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Autores principales:	Badal Mahalder, John S. Schwartz, Angelica M. Palomino, Jon Zirkle
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	cohesive sediments riverbed scour cylindrical bridge piers multiple flow events equilibrium scour depth Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/8af5a3d01fc54831a8235d487f24c87b
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spelling	oai:doaj.org-article:8af5a3d01fc54831a8235d487f24c87b2021-11-25T19:16:26ZScour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events10.3390/w132232892073-4441https://doaj.org/article/8af5a3d01fc54831a8235d487f24c87b2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/22/3289https://doaj.org/toc/2073-4441Scour evolution and propagation around a cylinder in natural cohesive sediment was uniquely investigated under multi-flow event varying sequentially by velocity magnitudes. This flume study differs from others that only used test sediment with commercially available clays for single flow. The objective of this study was to explore the potential differences in scour hole development in natural riverbed sediments subjected to varying flow velocity scenarios, advancing our understanding from existing studies on scour. The study consisted of 18 experimental runs based on: velocity, flow duration, and soil bulk density. Scour hole development progressed initially along the cylinder sides, and maximum depths also occurred at these lateral locations. Scour hole depths were less for higher soil bulk densities (≥1.81 g/cm<sup>3</sup>) compared with lower densities, and erosion rates were slower. It was observed with all flow sequences that scour depths were similar at the end of each experimental run. However, scour initiation was observed to be time dependent for soils with higher bulk density (1.81–2.04 g/cm<sup>3</sup>) regardless of flow velocity sequences. The observed time dependency suggests a process feedback with the scour hole development initiated at the cylinder sides, which influence local 3D hydraulics as the scour hole depth progresses.Badal MahalderJohn S. SchwartzAngelica M. PalominoJon ZirkleMDPI AGarticlecohesive sedimentsriverbed scourcylindrical bridge piersmultiple flow eventsequilibrium scour depthHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3289, p 3289 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cohesive sediments riverbed scour cylindrical bridge piers multiple flow events equilibrium scour depth Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	cohesive sediments riverbed scour cylindrical bridge piers multiple flow events equilibrium scour depth Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Badal Mahalder John S. Schwartz Angelica M. Palomino Jon Zirkle Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events
description	Scour evolution and propagation around a cylinder in natural cohesive sediment was uniquely investigated under multi-flow event varying sequentially by velocity magnitudes. This flume study differs from others that only used test sediment with commercially available clays for single flow. The objective of this study was to explore the potential differences in scour hole development in natural riverbed sediments subjected to varying flow velocity scenarios, advancing our understanding from existing studies on scour. The study consisted of 18 experimental runs based on: velocity, flow duration, and soil bulk density. Scour hole development progressed initially along the cylinder sides, and maximum depths also occurred at these lateral locations. Scour hole depths were less for higher soil bulk densities (≥1.81 g/cm<sup>3</sup>) compared with lower densities, and erosion rates were slower. It was observed with all flow sequences that scour depths were similar at the end of each experimental run. However, scour initiation was observed to be time dependent for soils with higher bulk density (1.81–2.04 g/cm<sup>3</sup>) regardless of flow velocity sequences. The observed time dependency suggests a process feedback with the scour hole development initiated at the cylinder sides, which influence local 3D hydraulics as the scour hole depth progresses.
format	article
author	Badal Mahalder John S. Schwartz Angelica M. Palomino Jon Zirkle
author_facet	Badal Mahalder John S. Schwartz Angelica M. Palomino Jon Zirkle
author_sort	Badal Mahalder
title	Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events
title_short	Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events
title_full	Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events
title_fullStr	Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events
title_full_unstemmed	Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events
title_sort	scour hole development in natural cohesive bed sediment around cylinder-shaped piers subjected to varying sequential flow events
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8af5a3d01fc54831a8235d487f24c87b
work_keys_str_mv	AT badalmahalder scourholedevelopmentinnaturalcohesivebedsedimentaroundcylindershapedpierssubjectedtovaryingsequentialflowevents AT johnsschwartz scourholedevelopmentinnaturalcohesivebedsedimentaroundcylindershapedpierssubjectedtovaryingsequentialflowevents AT angelicampalomino scourholedevelopmentinnaturalcohesivebedsedimentaroundcylindershapedpierssubjectedtovaryingsequentialflowevents AT jonzirkle scourholedevelopmentinnaturalcohesivebedsedimentaroundcylindershapedpierssubjectedtovaryingsequentialflowevents
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Scour Hole Development in Natural Cohesive Bed Sediment around Cylinder-Shaped Piers Subjected to Varying Sequential Flow Events

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