Estimating Incident and Reflected Waves Using a Fully Nonlinear Wave Model

Figueres, Miguel; Medina, Josep R.

doi:10.1142/9789812701916_0047

Cited by 22 publications

(29 citation statements)

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“…The deep water wave conditions were selected as a clear reference for wave characteristics in these experiments. Using the three wave gauges placed near the wave generator, incident and reflected waves were separated into non-linear and nonstationary waves using the LASA-V method developed by Figueres and Medina (2004).…”

Section: Wave Analysismentioning

confidence: 99%

Toe berm design for very shallow waters on steep sea bottoms

Herrera¹,

Medina²

2015

Coastal Engineering

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The toe berm is a relevant design element when rubble mound breakwaters are built on steep sea bottoms in breaking conditions. Different design formulas can be found in the literature to predict the damage caused to submerged toe berms placed on gentle bottom slopes. However, these formulas are not valid for very shallow waters in combination with steep sea bottoms where toe berms receive the full force of breaking waves. To guarantee breakwater stability in these conditions, new design formulas are needed for toe berms. To this end, physical model tests were carried out and data were analyzed to characterize rock toe berm stability in very shallow water and with a bottom slope m = 1/10. Based on test results, a new formula was developed with three parameters to estimate the nominal diameter (D n50 ) of the toe berm rocks:water depth at the toe (h s ), deep water significant wave height (H s0 ) and deep water wave length (L 0p ).

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Section: Wave Analysismentioning

confidence: 99%

Toe berm design for very shallow waters on steep sea bottoms

Herrera¹,

Medina²

2015

Coastal Engineering

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“…Tests were grouped in series of constant wave steepness having target Iribarren numbers 2.9<Irp=(2/3)Tp/(2πHm0/g) 0.5 <5.6, where Tp is the peak period and Hm0 is the incident significant wave height, which was increased progressively from zero damage to destruction. The LASA-V method (see Figueres and Medina, 2004) The crest freeboards of the double-layer cube and Cubipod models were Rc[cm]=+40.0 and +39.6, respectively (see Fig. 2).…”

Section: Laboratory Of Ports and Coasts At The Universitat Politècnicmentioning

confidence: 99%

Heterogeneous Packing and Hydraulic Stability of Cube and Cubipod Armor Units

Gómez-Martín

Medina

2014

J. Waterway, Port, Coastal, Ocean Eng.

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This paper describes the Heterogeneous Packing (HeP) failure mode of breakwater armors.HeP reduces the packing density of the armor layer near and above the mean water level (MWL) and increases the packing density below the MWL; armor units can move in the armor layer, although they are not actually extracted from it. When HeP occurs, armor layer porosity is not constant, and measurements obtained with conventional methods underestimate actual armor damage. First, in this paper the Virtual Net (VN) method is proposed to calculate armor damage considering both armor unit extraction (AUE) and HeP.The Cubipod concrete armor unit (CAU) is then described as a solution to the effects of HeP on conventional cubic block armors. The hydraulic stability of cube and Cubipod CAUs was compared in 2D laboratory experiments. Cube and Cubipod armor layers were tested in two wave flumes under non-breaking and non-overtopping conditions. The hydraulic stability was higher for double-layer Cubipod armors than for single-layer Cubipod armors, which had a higher hydraulic stability than conventional double-layer cube armors.2

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“…Water surface elevation was measured using capacity wave gauges at four points in the model area. The LASA-V method described by Figueres and Medina (2004) was used to estimate incident and reflected waves.…”

Section: Figure 2 Cross Section Of the 1/46 Scale Cube Units (Dimensmentioning

confidence: 99%

Influence of armour porosity on the hydraulic stability of cube armour layers

2014

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Armour placement and packing density directly affect construction costs and hydraulic performance of mound breakwaters. In this paper, the literature concerning the influence of armour porosity on the hydraulic stability of single-and double-layer armours is discussed.Qualitative and quantitative estimations for the influence of armour porosity and packing density on the hydraulic stability are given for the most common concrete armour units. The analysis focuses on specific 2D hydraulic stability tests of double-layer cube armours with different armour porosities and permeable core. The packing density showed a 1.2-power relationship with the stability number for cube units. The literature review and experimental results with small-scale breakwater models protected with a variety of armour units clearly indicate that a significant increase in armour porosity above the recommended values substantially decreases armour hydraulic stability. To avoid uncontrolled model effects, packing density should be routinely measured in small-scale tests, and armour placement techniques should be monitored at prototype scale. The actual packing density obtained in small-scale models and prototypes has to be explicitly reported, because packing density significantly affects hydraulic stability during service time. Key words:Breakwater, Heterogeneous Packing, Armour porosity, Packing density, Armour damage, Hydraulic stability, Armour unit, Cubic block. Highlights:(1) Armour porosity affects the hydraulic stability of armour layers. 1(2) Armour porosity or packing density is rarely included in armour stability formulae.(3) Packing density of randomly-placed double-layer cube armours is a relevant design factor affecting hydraulic stability and construction costs.(4) A significant 1.2-power relationship has been found between the stability number and packing density for double-layer cube armours.(5) The packing density of the armour layer has to be explicitly reported in small-scale tests and monitored at prototype scale.

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Estimating Incident and Reflected Waves Using a Fully Nonlinear Wave Model

Cited by 22 publications

References 0 publications

Toe berm design for very shallow waters on steep sea bottoms

Toe berm design for very shallow waters on steep sea bottoms

Heterogeneous Packing and Hydraulic Stability of Cube and Cubipod Armor Units

Influence of armour porosity on the hydraulic stability of cube armour layers

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