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A platform for research: civil engineering, architecture and urbanism
Design Scour Levels for Dune Revetments and Seawalls
A new method to determine design scour levels for dune revetments and seawalls is presented. The method is based on the thesis that toe scour is a function of the nearshore incident wave energy and was calibrated with results from several moveable bed model studies covering a large range of scales. The method determines scour levels to a still water level datum defined at the incident wave-breaking location. Therefore, the method incorporates many more parameters than those that pertain to existing methods including tidal stage, storm surge, wave setup, wave period, and seabed slope. However, application of the method is not difficult with a methodology being presented. The sensitivity of the method to variations in the values for the input parameters is examined and the limits of their applicability are presented. Recommendations for further research are given.
Seawalls are prone to collapse during storms if their footings are undermined by breaking waves. When designing seawalls, it is important to determine the level to which such scour can occur. However, existing methods for determining scour are simplistic and do not provide a scour level. This paper presents a new equation to predict scour levels for the design of seawall footings. The equation includes many of the important factors relating to storm scour including storm tide level, wave, and beach conditions. The equation was developed on the results of several scale model studies carried out in various laboratories over several decades with some comparisons with real-world experiences. The paper comprises all of the information used with clear diagrams. A simple application method is presented, the various factors that need to be considered for design are discussed, and recommendations for further studies are made.
Design Scour Levels for Dune Revetments and Seawalls
A new method to determine design scour levels for dune revetments and seawalls is presented. The method is based on the thesis that toe scour is a function of the nearshore incident wave energy and was calibrated with results from several moveable bed model studies covering a large range of scales. The method determines scour levels to a still water level datum defined at the incident wave-breaking location. Therefore, the method incorporates many more parameters than those that pertain to existing methods including tidal stage, storm surge, wave setup, wave period, and seabed slope. However, application of the method is not difficult with a methodology being presented. The sensitivity of the method to variations in the values for the input parameters is examined and the limits of their applicability are presented. Recommendations for further research are given.
Seawalls are prone to collapse during storms if their footings are undermined by breaking waves. When designing seawalls, it is important to determine the level to which such scour can occur. However, existing methods for determining scour are simplistic and do not provide a scour level. This paper presents a new equation to predict scour levels for the design of seawall footings. The equation includes many of the important factors relating to storm scour including storm tide level, wave, and beach conditions. The equation was developed on the results of several scale model studies carried out in various laboratories over several decades with some comparisons with real-world experiences. The paper comprises all of the information used with clear diagrams. A simple application method is presented, the various factors that need to be considered for design are discussed, and recommendations for further studies are made.
Design Scour Levels for Dune Revetments and Seawalls
J. Waterway, Port, Coastal, Ocean Eng.
Nielsen, Alexaer F. (author)
2023-05-01
Article (Journal)
Electronic Resource
English
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