Prediction of irregular wave runup by John Ahrens

Cover of: Prediction of irregular wave runup | John Ahrens

Published by Dept. of Defense, Dept. of the Army, Corps of Engineers, Coastal Engineering Research Center in Fort Belvoir, Va .

Written in English

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Subjects:

  • Water waves.

Edition Notes

Book details

Statementby John Ahrens.
SeriesTechnical aid - U.S. Army, Corps of Engineers, Coastal Engineering Research Center -- no. 77-2., Coastal engineering technical aid -- no. 77-2.
ContributionsCoastal Engineering Research Center (U.S.)
The Physical Object
Pagination14 p. :
Number of Pages14
ID Numbers
Open LibraryOL15567446M

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Prediction of irregular wave runup (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: John P Ahrens; Coastal Engineering Research Center (U.S.).

Prediction of irregular wave runup by Ahrens, John; Coastal Engineering Research Center (U.S.)Pages: A technique for predicting the runup distribution of wind-generated waves is presented which extends the traditional method of runup prediction for regular.

Prediction of irregular wave runup / by John Ahrens. By John P. Ahrens and Coastal Engineering Research Center (U.S.) Topics: Water waves. Prediction of irregular wave runup / By John P. Ahrens and Coastal Engineering Research Center (U.S.) Topics: Water waves.

Irregular wave run-up on beaches has been studied on the basis of laboratory and field data, which confirmed that long-term wave run-up corresponding to surf beat (or infragravity waves) appears in case of a sea bottom slope gentler than Prediction of irregular wave runup book 1/ No guidance for prediction of irregular wave runup is currently available in the Prediction of irregular wave runup book Protection Manual (SPM) (U.S.

Army, Corps of Engineers, Coastal Engineering Research Center, ) or other Corps publications. Summary of Irregular Wave Runup Prediction for Smooth Slopes: Hughes (b) recommended the following equations for prediction of irregular wave runup on smooth, impermeable slopes for nonbreaking (surging/collapsing) waves and breaking (plunging/spilling) waves as delineated by values of H mo / L p.

The Coastal and Hydraulics Engineering Technical Note (CHETN) described herein provides a new formula for estimation of irregular wave runup on rough, impermeable slopes. The runup guidance. Mean runup is simply the average runup (R) of all waves observed.

The two percent wave runup (R 2%) is the runup that only two percent of the wave runup values observed will reach or exceed. Wave Runup Prediction Formulas. Five different formulas for predicting wave runup were investigated in this study.

Within the method's range of applicability it supersedes Section"Irregular Waves," of the Shore Protection Manual (U.S. Army, Corps of Engineers, Coastal Engineering Research Center, ); CETA "Prediction of Irregular Wave Runup" by John P.

Ahrens; and CETA "Revised Wave Runup Curves for Smooth Slopes" by Philip N. Stoa. Wave runup determines the extent over which waves act. Wave runup is therefore an important parameter to determine flood inundation extents from coastal storms.

Cross-shore and longshore sediment transport are a function of the hydrodynamics on the beach and are therefore related to wave Cited by: 4. Prediction of irregular wave overtopping (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors / Contributors: John P Ahrens; Coastal Engineering Research Center (U.S.).

It is clarified that wave run-up is affected by the effects of the irregularity of incident waves and the slope configurations of structures. A statistical model to estimate the run-up height from the incident wave properties is proposed considering 90 % confidence intervals.

Prediction of irregular wave runup Ahrens, John. Wave runup on a 1 on 10 slope Ahrens, John. Design of riprap revetments for protection against wave attack Ahrens, John. More>>. Hunt () studied wave-driven runup on sloped impermeable structures and proposed a direct empirical relation between the wave runup of monochromatic waves and the Iribarren number: (7) R H 0 = Kξ or R = Kβ H 0 L 0 where K is a constant (equals to for average waves and for storm conditions) and ξ is the Iribarren number, which is commonly associated to the Author: Paula Gomes da Silva, Giovanni Coco, Roland Garnier, Antonio H.F.

Klein. Hunt () studied wave runup on smooth and rough bed conditions and proposed empirical relations for runup prediction based on the shape of breaking wave in surf zone (Eqs.

(1), (2)). (1) R u H ≈ 3 (2) R u H = tan α (H L 0) ; R H = ξ where R u is the maximum vertical runup from still water level, L 0 is the deep water wave length [ L 0 = g 2 π T 2 ], α is Cited by: D Wave Runup D Overview. Wave runup is the uprush of water from wave action on a shore barrier intercepting stillwater level.

The extent of runup can vary greatly from wave to wave in storm conditions, so that a wide distribution of wave runup elevations provides the precise description. for a specific situation. An incident wave represents an irregular sea state with Gaussian spectrum.

The asymptotic of probability functions in the range of large amplitudes for estimation of freak wave formation in the shore is studied. It is shown that average runup height of waves with wide spectrum is higher than that of waves with narrow by: 2. Very often for global and transoceanic events, due to the initial wave transformation, refraction, diffraction and multiple reflections from coastal topography and underwater bathymetry, the tsunami approaches the beach as a very long wave train, which can be considered as an irregular wave field.

The prediction of possible flooding and properties Author: Ira Didenkulova, Dmitry Senichev, Denys Dutykh. A method of predicting wind wave run-up (for any desired quantile or statistic value) on smooth linear mild slopes has been presented.

The method is based on a re-analysis of an extensive laboratory measurement run-up data base of Mase [(), Random wave Cited by: 3. In addition, it is shown that non-linear deterministic wave prediction based on second-order NLSE as well as HOSM leads to a substantial improvement of the prediction quality for moderate and steep irregular wave trains in terms of individual waves and prediction distance, with the HOSM providing a high accuracy over a wider range of : Marco Klein, Matthias Dudek, Günther F.

Clauss, Sören Ehlers, Jasper Behrendt, Norbert Hoffmann, Mig. Large-scale physical model test measurements of wave run-up are compared with wave run-up prediction derived from the Shore Protection Manual (SPM).Noteworthy discrepancies between the results of these two methods have been identified that include substantial overestimation of wave run-up elevations using the SPM approach, and computation of roughness coefficient.

A numerical model has been developed to predict the wave motion on a rough impermeable slope and the hydraulic stability and sliding motion of armor units under the action of a specified normally incident wave train. The developed numerical model has been compared with riprap test results to calibrate and verify the model.

A model is presented for the prediction of the hydrodynamic forces experienced by submarine pipelines exposed to irregular waves only or combined with steady current. Full text of "Approximate upper limit of irregular wave runup on riprap" See other formats nx> CM 71 S U.S.

cu^^zreL.^.o^. led^ ir TECHNICAL REPORT CERC APPROXIMATE UPPER LIMIT OF IRREGULAR WAVE RUNUP ON RIPRAP by John P. Ahrens, Martha S. Heimbaugh Coastal Engineering Research Center DEPARTMENT OF THE ARMY Waterways Experiment. The existing wave runup, bottom slope, and deep water Iribarren number data for regular and irregular waves on smooth, impermeable plane slopes were used as case studies.

The comparison of results reveals that, the ANFIS model provides high accuracy and reliability for wave runup estimation, providing better predictions compared to other Cited by: Wave runup is an important issue that needs to be considered in the design of offshore structure such as wind turbine piles.

Most of the recent proposed formulas for the estimation of wave runup height on vertical piles are based on the calculation of wave kinematics using an appropriate wave theory. In this study, regular and irregular wave runups were investigated based on. A New Method for the Prediction of Wave Runup on Vertical Piles Article in Coastal Engineering 98 April with Reads How we measure 'reads'.

In the past this has been a difficult prediction to make, but now a new method for calculating the approximate upper limit of wave runup on riprap has been formulated. This method is based on laboratory data and is easy to apply through use of a recommended or an alternative formula.

An incident wave represents an irregular sea state with Gaussian spectrum. The asymptotic of probability functions in the range of large amplitudes for estimation of freak wave formation in the shore is studied.

It is shown that the average runup height of waves with wide spectrum is higher than of waves with narrow by: 2. WAVE RUNUP AND OVERTOPPING 2 FEMA COASTAL FLOOD HAZARD ANALYSIS AND MAPPING GUIDELINES FOCUSED STUDY REPORTS As used in this report, wave overtopping refers to the volumetric rate at which runup flows over the top or crest of a slope, be it a beach, dune, or structure.

This report provides recommendations for: development of wave runup and. The open-source CFD wave model REEF3D has shown good performances in simulating wave propagation over irregular bottoms and a good prediction of wave forces on a cylinder in a uni-directional wave.

Books | * * * login first. views. embed Share Comments (0) More By Author. Prediction of irregular wave runup Ahrens, John. Prediction of irregular wave overtopping Prediction of irregular wave runup Ahrens, John.

Prediction of irregular wave overtopping Ahrens, John. Wave runup on a 1 on 10 slope Ahrens, John. Introduction. Wave runup represents the landward limit of wave action on a beach.

It consists of a combination of two processes: swash and wave generated setup (Holman, ).The wave runup region is of crucial importance for coastal engineering and management applications: from wave overtopping of coastal barriers and engineering structures to predicting coastal erosion Cited by:   Wave Runup and Overtopping on Beaches and Coastal Structures (N Kobayashi) On Second Order Wave Loading and Response in Irregular Seas (R E Taylor & M P Kernot) Free Surface Tracking Methods and Their Applications to Wave Hydrodynamics (P Lin & P-F Liu).

Random Wave Run-Up on Coastal Dikes and Seawalls. Maxima of Irregular Wave Profiles; Nonlinearity of Sea Waves. He is a pioneer in the field of engineering applications of random sea waves as exemplified by his book Random Seas and Design of Maritime Structures, the third edition of which will be published in from the World.

Statistical estimates of characteristics of long-wave run-up on a beach Article in Izvestiya Atmospheric and Oceanic Physics 46(4) August with 12. Kobayashi, N.; Pietropaolo, J.A., and Melby, J.A., Wave transformation and runup on dikes and gentle slopes.

Coastal flood-risk mapping requires the prediction of wave runup and overtopping of dikes and beaches. The cross-shore numerical model CSHORE is adjusted to predict irregular wave runup on impermeable dikes. The model is compared with wave runup tests and 97 wave Cited by: 6. Second-order wave forces on a large diameter vertical circular cylinder, computed according to a semi-analytic nonlinear diffraction theory, are compared to results of 22 laboratory experiments with regular waves.

In general, predicted forces agree quite well with measured forces. In most tests, both measured and predicted maximum forces exceeded linear theory by 5 to 15%. Impulse waves are generated by landslides or avalanches impacting oceans, lakes or reservoirs, for example.

Non-breaking impulse wave runup on slope angles ranging from 10° to 90° (V/H: 1/ to 1/0) is investigated. The prediction of runup heights induced by these waves is an important parameter for hazard assessment and mitigation. An experimental dataset Cited by: 1.

2. Experimental Results The wind and wave test facility of the UPV is 30 m long, 1,2 m wide and m deep. A piston-type wave maker with a maximum stroke of 80 cm generates resgular and irregular waves without active wave absorption. Exhaust blowers provide wind flow, while air is pulled into the tunnel through a vertically-adjustable intake.Applying Equation 9 to irregular wave runup requires that regular wave height and period (H and T) used to estimate the wave momentum flux parameter using Equations 6, 7, and 8 be replaced with representative irregular wave parameters (H mo and T p).

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