Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Worldwide, the failure of river dikes causes a large number of casualties and flood damage. Different failure modes can induce the collapse of these structures; but overtopping is by far the most frequent one. Although many studies were conducted to better understand the breaching process, most of them focused on dam configurations (i.e. flow normal to the structure) or on coastal dikes. In this research, we aim to improve the current understanding of the breaching of river dikes (i.e. flow parallel to the structure), which differs significantly from the frontal configuration. The objective is to contribute to the development of a numerical tool able to predict the evolution of a breach and the induced flow in river dikes undergoing overtopping.
The present research is structured along two main lines. On the one hand, an experimental model was built in the laboratory of Engineering Hydraulics at the University of Liege in order to collect experimental data which give a better insight into the physical processes involved in the dike breaching. Specifically, the experimental observations highlight the influence of the upstream flow conditions (in the main channel) on the shape of the breach and on its dynamic evolution (deepening vs. widening).
On the other hand, three numerical models of increasing complexity were studied and compared with existing data. The three models include a hydraulic module and a breaching module; but they differ in the representation of the flow (simple assumption such as constant head vs. fully dynamic flow model). After successfully validating the upgrades that we coded in these models, we performed numerical simulations of our experimental tests. The results demonstrate that the model is operational and provides some indications on dike breaching process. However, the module computing the breach geometry evolution is still at an early stage and needs further refinements based on more experimental tests.

Dike --- Overtopping --- Failure --- Breach --- River --- Ingénierie, informatique & technologie > Ingénierie civile

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Due to the ongoing rise in sea level and increases in extreme wave climates, which consequently change the wave climate, coastal structures such as sea dikes and seawalls are exposed to severe and frequent sea storms. Even though much research related to wave–structure interactions has been carried out, it remains one of the most important and challenging topics in the field of coastal engineering. The recent publications in the Special Issue “Wave Interactions with Coastal Structures” in the Journal of Marine Science and Engineering include a wide range of research, including theoretical/mathematical, experimental, and numerical work related to the interaction between sea waves and coastal structures. These publications address conventional coastal hard structures in deep water zones as well as those located in shallow water zones, such as wave overtopping over shallow foreshores with apartment buildings on dikes. The research findings presented help to improve our knowledge of hydrodynamic processes, and the new approaches and developments presented here will be good benchmarks for future work.

Technology: general issues --- History of engineering & technology --- shallow waters --- wave energy --- coastal erosion --- beach restoration --- submerged breakwaters --- protected nourishments --- wave overtopping --- coastal safety --- flow velocity --- flow depth --- sea dikes --- overtopping reduction --- force reduction --- oblique waves --- storm return wall --- EurOtop manual --- validation --- wave modelling --- shallow foreshore --- dike-mounted vertical wall --- wave impact loads --- OpenFOAM --- average overtopping discharge --- individual volume --- overtopping flow depth --- overtopping flow velocity --- promenade --- vertical wall --- SWASH --- fluid-structure interaction --- waves --- smoothed particle hydrodynamics --- SPH --- Pont del Petroli --- storm Gloria --- inter-model comparison --- DualSPHysics --- wave pressure --- caisson breakwater --- stability --- RANS model --- solitary wave --- fully nonlinear wave --- three-dimensional wave --- partially submerged cylinder --- hollow circular cylinder --- tsunami --- wave --- bore --- flooding --- debris --- numerical modeling --- SPH-FEM coupling --- coastal structures

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This reprintshows recent advances in dam safety related to overtopping and the prevention, detection, and risk assessment of geostructural risks. Related to overtopping, the issues treated are: the throughflow and failure process of rockfill dams; the protection of embankment dams against overtopping by means of a rockfill toe or wedge-shaped blocks; and the protection of concrete dams with highly convergent chutes. In the area of geostructural threats, the detection of anomalies in dam behavior from monitoring data using a combination of machine learning techniques, the numerical modeling of seismic behavior of concrete dams, and the determination of the impact area downstream of ski-jump spillways are also studied and discussed. In relation to risk assessment, three chapters deal with the development of fragility curves for dikes and dams in relation to various failure mechanisms.

Technology: general issues --- History of engineering & technology --- hydraulic structure --- sky-jump --- spillway --- flip bucket --- chute --- basin --- erosion --- flow rate --- jet flow --- wave overtopping --- levee --- cover --- probabilistic framework --- slope stability --- piping --- overtopping --- fragility curves --- Monte Carlo simulation --- dam --- stilling basin --- bucket --- flood --- weir --- safety --- protection --- dam protection --- wedge-shaped block --- WSB --- dam spillway --- dam safety --- ACUÑA --- rockfill dams --- throughflow --- numerical modeling --- non-Darcy flow --- porous media --- Forchheimer equation --- high velocity --- crushed rock --- rounded materials --- hydraulic mean radius --- intrinsic permeability --- shape of particles --- angularity of particles --- surface roughness of particles --- river levees --- geogrid reinforcement --- First Order Reliability Method (FORM) --- Surface Response Method (SRM) --- high gravity dams --- dam-foundation-reservoir dynamic interaction --- earthquake input mechanisms --- hydrodynamic pressure --- foundation size --- reservoir length --- stacking --- blending --- combination --- meta-learner --- experts --- machine learning --- Cross Validation --- radial displacement --- rockfill dam --- dam failure --- overflow --- floods --- dam breach --- n/a --- ACUÑA

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This book presents 16 selected papers from the 7th International Conference on The Application of Physical Modelling in Coastal and Port Engineering and Science, Coastlab18. The conference was organized in Santander, Spain, from 22 to 26 May, 2018, by the Instituto de Hidráulica Ambiental de la Universidad de Cantabria, IHCantabria. Coastlab18 welcomed 175 attendees from 18 different countries. The technical program included three renowned keynote lectures and 120 presentations focused on theoretical and practical aspects related to physical modelling in the field of coastal and ocean engineering. Coastal and ocean structures, breakwaters, revetments, laboratory technologies, measurement systems, coastal field measurement and monitoring, combined physical and numerical modelling, physical modelling case studies, tsunamis, and coastal hydrodynamics were the main topics covered in the conference. This book attempts to cover, as completely as possible, all the topics presented during the conference. The papers were accepted after a peer-review process based on their full text.

History of engineering & technology --- hydraulic stability --- breaking wave conditions --- low-crested structures --- mound breakwaters --- armor layer --- overtopping --- dikes --- sea defenses --- bimodal seas --- swell --- oblique waves --- crossing seas --- wave basin --- mound breakwater --- armor stability --- Cubipod® --- breaking waves --- non-overtopping --- horizontal foreshore --- regular waves --- Stepped revetment --- wave impact --- physical model test --- rock slopes --- damage characterization --- damage parameters --- physical model tests --- linear waves --- nonlinear waves --- wavemaker theory --- wavemaker applicability --- outdoor wave basin --- long-term development --- vegetation development --- ecosystem services --- nature-based --- vertical barrier --- semi-submerged --- wind waves --- experiments --- laboratory --- operational system --- wave forecast --- wave modelling --- Mediterranean Sea --- monitoring program --- beach management --- bichromatic waves --- reflection separation --- bound waves --- stability --- erosion --- sea level rise --- repetition tests --- berm --- wave flume --- length effect --- aquaculture --- drag --- inertia --- Abbott-Firestone Curve --- laboratory tests --- physical model experiments --- scouring --- shingle foreshore --- sloping wall --- combined field experiment and numerical modeling --- overwash --- wave run-up --- infragravity waves --- XBeach --- coastal flooding --- dune erosion --- landslide waves --- tsunamis --- laboratory experiments --- momentum balance --- numerical wave modeling --- vertical cylinder --- DNS model --- pressure gradient --- wave force --- scour and shear stress

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

This book is the result of a stimulating Special Issue of Water, focusing on the “Interaction between waves and Maritime Structures”. This broadly inclusive title allowed the gathering of articles on different topics of engineering concern, making the book appeal to both scientists and practical engineers. Original contributions on evergreen problems, such as wave overtopping at conventional and unconventional coastal structures, wave-induced pressures at vertical walls, hydraulic stability of rubble mound breakwaters and dynamics of crown-walls indeed represent the main core of the book; however, other intriguing research topics are also tackled, including the solution of the Navier–Stokes equations for biphase flows, the downscaling of large maritime structures in a physical lab, floating bodies mechanics and the numerical modeling of coastline evolution.

Technology: general issues --- rock armor stability --- breakwater --- damage --- notional permeability factor --- crown wall failure --- dynamic response --- sliding --- overturning --- bearing capacity --- ship motions --- in-situ observations --- port operation --- transfer functions --- meteorological and ocean conditions --- vessel dimensions --- electrical platform --- hydrodynamic response --- strain --- acceleration --- hydroelastic similarity --- laboratory experiment --- wave overtopping --- flow velocity --- flow depth --- dike --- wave breaking --- experiments --- numerical modelling --- floating cylinder --- water filled --- motion capturing --- wave tank --- wave gauges --- fluid-structure interaction --- free surface --- sloshing --- image analysis --- green water --- wet dam-break bore --- 2D experimental study --- water elevation database --- Venetian lagoon --- flooding --- astronomical tide --- storm surge --- experimental investigation --- two-phase flows --- fluid-structure interactions --- wave decomposition --- floating body --- recurves --- recurve geometry --- vertical seawalls --- wave loads and pressures --- pulsating and impulsive conditions --- validation experiment --- shoreline evolution --- littoral drift --- equivalent wave --- one-line equation --- coastal defenses --- structure response