Wave overtopping at berm breakwaters: Experimental study and development of prediction formula

Pillai, Karthika; Etemad-Shahidi, Amiri; Lemckert, Charles James

doi:10.1016/j.coastaleng.2017.10.004

Cited by 26 publications

(16 citation statements)

References 37 publications

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“…The model performance was evaluated by computing the root-mean-square error (RMSE) and percent relative error (RE) between the observed and simulated groundwater heads and TDS concentrations. RMSE was calculated as (Pillai et al 2017):…”

Section: Model Performance Evaluationsmentioning

confidence: 99%

“…where X obs is the observed groundwater head or TDS concentration, X sim is the predicted groundwater head or TDS concentration, and n is the number of observation wells (2) in the study area. The relative error (RE) was calculated as (Pillai et al 2017):…”

Section: Model Performance Evaluationsmentioning

confidence: 99%

“…Information obtained from the literature (Table 2) for different aquifers was used to develop a generic prediction model. To remove the scale impacts, dimensionless parameters were adopted to generate linear equations between SLR and ΔT50 (Pillai et al 2017). To obtain a high correlation coefficient between input and output data, different dimensionless parameters were examined.…”

Section: Model Performance Evaluationsmentioning

confidence: 99%

“…The M5 algorithm computes the standard deviation reduction index (SDR) for the partitioning of input area with the optimal structure of the tree (Frank et al 2004) as follows (Pillai et al 2017):…”

Section: Development Of M5 Treementioning

confidence: 99%

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Investigation of transient sea level rise impacts on water quality of unconfined shallow coastal aquifers

Ranjbar

Cherubini

Saber

2020

Int. J. Environ. Sci. Technol.

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This study analyzes the impacts of 1 m gradual and instantaneous sea level rise combined with pumping activity on seawater wedge toe location in a shallow coastal aquifer located in the southern shores of the Caspian Sea. The gradual sea level rise scenario investigates the transition variation of seawater wedge toe due to linear and parabolic between the years 2015 and 2100. Moreover, the maximum value of saltwater intrusion due to variations in hydraulic conductivity and aquifer's recharge rates is analyzed and compared with flux-controlled and head-controlled boundary condition systems. A tree model is also applied to develop a linear regression between the sea level rise and aquifer parameters derived from different real coastal aquifers in the literature. The results indicate that 1 m gradual sea level rise in the study area by the end of the year 2100 considering all 1320 pumping wells leads to a 6.5% depletion of freshwater volume. The results also show that the peak saltwater intrusion rate during nonlinear gradual sea level rise rises with increasing the aquifer depth and horizontal hydraulic conductivity and the time to reach the saltwater intrusion peak rate considering the current recharge rate of an aquifer is about 48 m. The maximum saltwater intrusion lengths estimated by the tree model are 48 m and 10.42 m for head-controlled and flux-controlled boundary conditions, respectively, indicating that the saltwater intrusion in the aquifer due to instantaneous seal level rise is closer to head-controlled boundary conditions.

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Section: Model Performance Evaluationsmentioning

confidence: 99%

Section: Model Performance Evaluationsmentioning

confidence: 99%

Section: Model Performance Evaluationsmentioning

confidence: 99%

Section: Development Of M5 Treementioning

confidence: 99%

See 2 more Smart Citations

Investigation of transient sea level rise impacts on water quality of unconfined shallow coastal aquifers

Ranjbar

Cherubini

Saber

2020

Int. J. Environ. Sci. Technol.

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“…Recently Van der Meer et al [2] has provided allowable values of mean overtopping rates as well as maximum overtopping volumes for different cases. Pillai et al ([4], [5]) reviewed the existing approaches for the estimation of mean overtopping rates and developed a more accurate formula for it. To our knowledge, no study has been conducted on the estimation of max overtopping volume and runup at berm structures.…”

Section: Introductionmentioning

confidence: 99%

Wave run-up on bermed coastal structures

Pillai

Etemad‐Shahidi

Lemckert

2019

Applied Ocean Research

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Reliable estimation of wave run-up is required for the effective and efficient design of coastal structures when flooding or wave overtopping volumes are an important consideration in the design process. In this study, a unified formula for the wave run-up on bermed structures has been developed using collected and existing data. As data on berm breakwaters was highly limited, physical model tests were conducted and the run-up was measured. Conventional governing parameters and influencing factors were then used to predict the dimensionless run-up level with 2% exceedance probability. The developed formula includes the effect of water depth which is required in understanding the influence of sea level rise and consequent changes of wave height to water depth ratio on the future hydraulic performance of the structures. The accuracy measures such as RMSE and Bias indicated that the developed formula is more accurate than the existing formulas. Additionally, the new formula was validated using field measurements and its superiority was observed when compared to the existing prediction formulas. Finally, the new design formula incorporating the partial safety factor was introduced as a design tool for engineers.

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Wave-Structure Interactions at Sea Defences Using Numerical Modelling Approaches: A Systematic Literature Review

Xu,

Keenahan,

Salauddin

2024

Lecture Notes in Civil Engineering

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Wave overtopping at berm breakwaters: Experimental study and development of prediction formula

Cited by 26 publications

References 37 publications

Investigation of transient sea level rise impacts on water quality of unconfined shallow coastal aquifers

Investigation of transient sea level rise impacts on water quality of unconfined shallow coastal aquifers

Wave run-up on bermed coastal structures

Wave-Structure Interactions at Sea Defences Using Numerical Modelling Approaches: A Systematic Literature Review

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