TY - JOUR
T1 - Experimental study of bore-driven swash hydrodynamics on impermeable rough slopes
AU - Kikkert, G. A.
AU - O'Donoghue, T.
AU - Pokrajac, D.
AU - Dodd, N.
N1 - Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/2/1
Y1 - 2012/2/1
N2 - A detailed experimental investigation of the hydrodynamics of large-scale, bore-driven swash on impermeable, rough beach slopes is described. The experiments were carried out on 1:10 impermeable, rough slopes with three different surface roughnesses based on 1.3. mm sand, 5.4. mm gravel and 8.4. mm gravel. The large-scale discrete swash event was produced by the collapse of a dambreak-generated bore on the beach. Simultaneous depths and velocities were measured using LIF, Laser-induced fluorescence, and PIV, particle image velocimetry, respectively, yielding better resolution of the hydrodynamics than previous studies. Depth time-series, instantaneous velocity profiles, depth-averaged velocities, instantaneous turbulent kinetic energy profiles, depth-averaged turbulent kinetic energy, Reynolds stress profiles and bed shear stresses are presented for five cross-shore measurement locations in the swash. The measurements resolve the backwash shoreline position, and the late backwash period when depths are shallow and velocities are high. The detailed data can be used to test and develop advanced numerical models for bore-driven waves on rough slopes.
AB - A detailed experimental investigation of the hydrodynamics of large-scale, bore-driven swash on impermeable, rough beach slopes is described. The experiments were carried out on 1:10 impermeable, rough slopes with three different surface roughnesses based on 1.3. mm sand, 5.4. mm gravel and 8.4. mm gravel. The large-scale discrete swash event was produced by the collapse of a dambreak-generated bore on the beach. Simultaneous depths and velocities were measured using LIF, Laser-induced fluorescence, and PIV, particle image velocimetry, respectively, yielding better resolution of the hydrodynamics than previous studies. Depth time-series, instantaneous velocity profiles, depth-averaged velocities, instantaneous turbulent kinetic energy profiles, depth-averaged turbulent kinetic energy, Reynolds stress profiles and bed shear stresses are presented for five cross-shore measurement locations in the swash. The measurements resolve the backwash shoreline position, and the late backwash period when depths are shallow and velocities are high. The detailed data can be used to test and develop advanced numerical models for bore-driven waves on rough slopes.
KW - dam-break
KW - swash
KW - laboratory experiments
KW - bore
KW - turbulence
KW - shear stress
UR - http://www.scopus.com/inward/record.url?scp=84855198206&partnerID=8YFLogxK
U2 - 10.1016/j.coastaleng.2011.09.006
DO - 10.1016/j.coastaleng.2011.09.006
M3 - Article
AN - SCOPUS:84855198206
SN - 0378-3839
VL - 60
SP - 149
EP - 166
JO - Coastal Engineering
JF - Coastal Engineering
IS - 1
ER -