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Effect of sediment supply on suction scour under a rock berm

Effect of sediment supply on suction scour under a rock berm
Effect of sediment supply on suction scour under a rock berm

This paper presents a case study of sediment transport behaviour from between armor rocks in a rock berm placed on a fine sandy seabed model. The test was conducted in the Large O-tube facility at The University ofWestern Australia under steady current and combined irregular flow conditions (live bed). Suction removal of sediment from under the rocks has been identified as a mechanism that can lead to the sinkage of a berm by previous researchers. Suction removal was not observed in the reported tests. Instead the gaps between rocks were filled up gradually with sand. The main reason for this contrasting behaviour compared to previous studies was that there was sediment supply from upstream, thanks to the recirculating nature of the O-tube flume. This supply added sediment to the rock berm in excess of that which could be mobilised through suction scour. This result suggests that the influence of sediment supply should be considered to create improved physical modelling of suction scour, and to allow better design of rock berms for stability against sinking.

265-273
CRC Press
An, H.
7268aa4f-4ba9-497c-bd05-cfe591093a05
Cheng, L.
7053bc0f-65f2-4d10-9bd8-9cee29226747
Luo, C.
a4f621a4-1dfc-4aeb-ba21-6f5f0348a5ae
Draper, S.
0f43dd70-abdf-4ba3-a9e0-6b4ba932b61e
White, D.
a986033d-d26d-4419-a3f3-20dc54efce93
Jas, E.
4f663658-b5c6-4dcb-8bfb-e47a622c8b8d
Cheng, Liang
Draper, Scott
An, Hongwei
An, H.
7268aa4f-4ba9-497c-bd05-cfe591093a05
Cheng, L.
7053bc0f-65f2-4d10-9bd8-9cee29226747
Luo, C.
a4f621a4-1dfc-4aeb-ba21-6f5f0348a5ae
Draper, S.
0f43dd70-abdf-4ba3-a9e0-6b4ba932b61e
White, D.
a986033d-d26d-4419-a3f3-20dc54efce93
Jas, E.
4f663658-b5c6-4dcb-8bfb-e47a622c8b8d
Cheng, Liang
Draper, Scott
An, Hongwei

An, H., Cheng, L., Luo, C., Draper, S., White, D. and Jas, E. (2015) Effect of sediment supply on suction scour under a rock berm. Cheng, Liang, Draper, Scott and An, Hongwei (eds.) In Scour and Erosion: Proceedings of the 7th International Conference on Scour and Erosion, ICSE 2014. CRC Press. pp. 265-273 .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents a case study of sediment transport behaviour from between armor rocks in a rock berm placed on a fine sandy seabed model. The test was conducted in the Large O-tube facility at The University ofWestern Australia under steady current and combined irregular flow conditions (live bed). Suction removal of sediment from under the rocks has been identified as a mechanism that can lead to the sinkage of a berm by previous researchers. Suction removal was not observed in the reported tests. Instead the gaps between rocks were filled up gradually with sand. The main reason for this contrasting behaviour compared to previous studies was that there was sediment supply from upstream, thanks to the recirculating nature of the O-tube flume. This supply added sediment to the rock berm in excess of that which could be mobilised through suction scour. This result suggests that the influence of sediment supply should be considered to create improved physical modelling of suction scour, and to allow better design of rock berms for stability against sinking.

Full text not available from this repository.

More information

Published date: 2015
Venue - Dates: 7th International Conference on Scour and Erosion, ICSE 2014, Perth, Australia, 2014-12-02 - 2014-12-04

Identifiers

Local EPrints ID: 419774
URI: https://eprints.soton.ac.uk/id/eprint/419774
PURE UUID: 47f94614-7cfb-4994-8c8a-f87fb26bd64d
ORCID for D. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 20 Apr 2018 16:30
Last modified: 20 Jul 2019 00:25

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Contributors

Author: H. An
Author: L. Cheng
Author: C. Luo
Author: S. Draper
Author: D. White ORCID iD
Author: E. Jas
Editor: Liang Cheng
Editor: Scott Draper
Editor: Hongwei An

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