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BARDEX (Barrier Dynamics Experiment): Taking the Beach into the Laboratory

BARDEX (Barrier Dynamics Experiment): Taking the Beach into the Laboratory
BARDEX (Barrier Dynamics Experiment): Taking the Beach into the Laboratory
Although relatively common features, few laboratory studies have examined the dynamic response of gravel beaches and barriers to both tides and waves. To address this a prototype gravel barrier (5 m wide and 4 m high with seaward and lagoon facing slopes of 1:8 and 1:4) composed of sub-rounded gravel ( D50=10 mm) has been studied in the Delta flume. Detailed hydrodynamics and beach morphology were measured using video, buried PTs, ECMs and closely spaced bed location sensors on a scaffold frame spanning the entire barrier. Additional
measurements were obtained from instruments on an offshore frame. A series of systematic tests were undertaken using pumps to change water levels on the seaward (hs) and lagoon (hj) sides of the barrier. These included: 1) hydraulic conductivity tests (hs and hj levels were varied); 2) tests to assess the impact of waves (hs= 2.5 m with variable hj and waves of lm and periods 5-7 s; 3) tests examining the effect of tides (tidal simulation by varying hs from 1.75 m to 3.25 m with hi at high, medium and low levels and 1 m random and regular waves with periods 3 s, 5 s and 7 s); and 4) overwash tests (tidal simulation with variable hi and random waves of height ca. 1 m and periods 4.5s, 6s, 7s and 8s). This paper is intended primarily to make the community aware of the experiments and to describe the objectives and methods used.
0749-0208
158-162
Williams, J.
8d4fa85f-eb90-47ca-8115-c34793fad602
Masselink, G.
c03c49e8-8480-435e-a519-898225b8cbab
Buscombe, D.
fa06cfcb-5b3c-42c8-a50d-e0d43361c11e
Turner, I.
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Matias, A.
c763c7c2-e25c-49e4-890b-ec8f07d2968f
Ferreira, O.
05ded6ea-693e-4061-9b6f-23ef3e10f6cd
Bradbury, A.
7754bccc-946f-4e71-9d9d-87fb8c6ff2c4
Metje, N.
87608f83-cb14-472a-a6e6-9bd78af44ee7
Coates, L.
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Chapman, D.
550f508a-4659-4469-8d6a-1449b7976843
Thompson, C.
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Albers, T.
dc498ff4-6f1e-4b0d-9e37-4b31c5cba582
Pan, S.
a0257b99-abea-419c-8eb9-b102e603c198
Williams, J.
8d4fa85f-eb90-47ca-8115-c34793fad602
Masselink, G.
c03c49e8-8480-435e-a519-898225b8cbab
Buscombe, D.
fa06cfcb-5b3c-42c8-a50d-e0d43361c11e
Turner, I.
4262af65-f20d-4b4d-b243-344e5c6ebbff
Matias, A.
c763c7c2-e25c-49e4-890b-ec8f07d2968f
Ferreira, O.
05ded6ea-693e-4061-9b6f-23ef3e10f6cd
Bradbury, A.
7754bccc-946f-4e71-9d9d-87fb8c6ff2c4
Metje, N.
87608f83-cb14-472a-a6e6-9bd78af44ee7
Coates, L.
2be36c11-8cb2-4518-a001-953051aa6a23
Chapman, D.
550f508a-4659-4469-8d6a-1449b7976843
Thompson, C.
2a304aa6-761e-4d99-b227-cedb67129bfb
Albers, T.
dc498ff4-6f1e-4b0d-9e37-4b31c5cba582
Pan, S.
a0257b99-abea-419c-8eb9-b102e603c198

Williams, J., Masselink, G., Buscombe, D., Turner, I., Matias, A., Ferreira, O., Bradbury, A., Metje, N., Coates, L., Chapman, D., Thompson, C., Albers, T. and Pan, S. (2009) BARDEX (Barrier Dynamics Experiment): Taking the Beach into the Laboratory. Journal of Coastal Research, Special Issue 5, 158-162.

Record type: Article

Abstract

Although relatively common features, few laboratory studies have examined the dynamic response of gravel beaches and barriers to both tides and waves. To address this a prototype gravel barrier (5 m wide and 4 m high with seaward and lagoon facing slopes of 1:8 and 1:4) composed of sub-rounded gravel ( D50=10 mm) has been studied in the Delta flume. Detailed hydrodynamics and beach morphology were measured using video, buried PTs, ECMs and closely spaced bed location sensors on a scaffold frame spanning the entire barrier. Additional
measurements were obtained from instruments on an offshore frame. A series of systematic tests were undertaken using pumps to change water levels on the seaward (hs) and lagoon (hj) sides of the barrier. These included: 1) hydraulic conductivity tests (hs and hj levels were varied); 2) tests to assess the impact of waves (hs= 2.5 m with variable hj and waves of lm and periods 5-7 s; 3) tests examining the effect of tides (tidal simulation by varying hs from 1.75 m to 3.25 m with hi at high, medium and low levels and 1 m random and regular waves with periods 3 s, 5 s and 7 s); and 4) overwash tests (tidal simulation with variable hi and random waves of height ca. 1 m and periods 4.5s, 6s, 7s and 8s). This paper is intended primarily to make the community aware of the experiments and to describe the objectives and methods used.

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More information

Published date: 2009
Additional Information: Paper presented at 10th International Coastal Symposium (ICS 2009)

Identifiers

Local EPrints ID: 71851
URI: http://eprints.soton.ac.uk/id/eprint/71851
ISSN: 0749-0208
PURE UUID: 9ebf8ce4-dcf4-4b48-9ba7-9521b93f0e23
ORCID for C. Thompson: ORCID iD orcid.org/0000-0003-1105-6838

Catalogue record

Date deposited: 05 Jan 2010
Last modified: 13 Apr 2023 01:38

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Contributors

Author: J. Williams
Author: G. Masselink
Author: D. Buscombe
Author: I. Turner
Author: A. Matias
Author: O. Ferreira
Author: A. Bradbury
Author: N. Metje
Author: L. Coates
Author: D. Chapman
Author: C. Thompson ORCID iD
Author: T. Albers
Author: S. Pan

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