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29 | P a g e <br />RFQ #16-06-01 Shoreline Surveying & Mapping Consulting Services <br />event frequency overall may be beneficial in maintaining adequate beach width for shore protection and <br />for recreational use. <br /> <br />Coastal Systems conducted a comprehensive coastal <br />engineering study for Sunny Isles to evaluate coastal <br />processes along the shoreline of Sunny Isles. Detailed <br />hydrographic surveys of two existing submerged <br />breakwaters were conducted along with beach profiling <br />to provide data for input into the numerical modeling <br />software. Offshore wave statistics were prepared <br />utilizing wave data from 1980-1999 to obtain annual <br />conditions that influence sediment transport. Wave <br />modeling was conducted by utilizing the Danish <br />Hydraulics Institute (DHI) MIKE-21 Spectral Wave (SW) <br />model to simulate offshore waves propagating onshore. <br />This model was coupled with the MIKE-21 <br />Hydrodynamic (HD) model to determine the littoral <br />current generated by breaking waves. The resulting <br />sediment transport was evaluated to identify erosion <br />trends along the shoreline. The numerical modeling <br />results indicated that the north segment is <br />characterized with the highest degree of erosion, while <br />the south section was mildly erosional, and the middle <br />section was relatively stable. <br /> <br />Two hot spots were identified in the northern section, <br />and wave focusing results were evaluated. Beach <br />management recommendations were prepared based <br />on the coastal engineering results, and coastal structure <br />concepts were prepared for shore stabilization. <br />Additional beach management recommendations were <br />provided as longer term solutions to reduce erosion <br />rates, mitigate local hot spots, and to extend the life of beach nourishment projects.