![]() Provide the unit rate for the armour layer material which is used to calculate the cross-sectional breakwater costs. Using lineair wave theory, the wave height is transformed to nearshore conditions. In case the design storm conditions are provided at an offshore location, provide the offshore depth of that location. The maximum wave height is defined by the breaker parameter times the local waterdepth. This is used to calculate the total number of waves that is expected to reach the breakwater.ĭefines the wave height at which waves start to break. to MSL that is present during storm conditions. Provide the water level at the tip of the breakwater w.r.t. Wave peak period during design storm conditions. Significant wave height during design storm conditions. Using lineair wave theory the wave height is transformed to nearshore conditions in case offshore storm conditions are provided. Indicate whether the design storm conditions are provided at an offshore or nearshore (at the breakwater toe). By clicking on the ( ) button, you can also select extreme wave conditions from the generic data. In case the automated crest height calculation is switched off, provide the crest height of the breakwater. Provide the width of the top of the breakwater (crest). The inner and outer slopes are considered equal. Provide the outer slope of the breakwater (as 1. In case this option is not selected, provide a crest height. In case this is selected, the crest height will be automatically calculated based on the design criteria. In case a uniform depth type is selected, provide the water depth value. In case of a Varying depth type, the bottom depth provided by Generic Data is used. Select the design safety level which determines the amount of allowable wave overtopping.īased on the selected safety level, this shows the allowable overtopping for the breakwater design. Default values are provided for each input field. The following inputs are defined: Press the delete button to delete the output from the map.Ī number of user input fields are provided which can be used to adjust the calculation according to the local situation.Output properties This panel shows a summery of the input and output parameters per cross-section. The slider below the plots allows for selecting a different cross-section.At every cross-section a vertical line is shown, corresponding to the breakwater height at that specific cross-section. The water level, the depth profile and the crest height are all indicated in this plot. Longitudinal breakwater design This plot shows the breakwater dimensions along the breakwater's longitudinal axis.The cross-sections are numbered in offshore direction. The slider below the plots allows for selecting a different cross-section. Also the water level during storm conditions is indicated. Cross-sectional breakwater design For each cross-section along the breakwater (indicated by the grey dot), this plot shows the cross-sectional dimensions of the armour, filter and core layer.After the calculation, subwindows are presented below the map which hold the following information:.Press the play button to start the breakwater design calculation.After selecting the breakwater, grey dots are shown along the breakwater to indicate the cross sections that will be calculated. Provide input according to the user input field description below.Make sure that the breakwaters intersect with the coastline, a Cross-shore profile (both a slope and a spatial varying field are supported by this tool),. ![]() Results of the breakwater tool should therefore be interpreted with a considerable range of uncertainty. Computations of breakwater dimensions and costs are based on rough guidelines in the Rock manual. Optionally, any generic wave data can also be used, in order to fill the wave condition fields. The tool requires at least a breakwater and bathymetry data (you can inspect the generic data availability in the top panel of the tool). In this tool (breakwater design) you can compute required dimensions, overtopping, cross-sections and costs of rubble mound breakwaters.
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