<p> The nearshore morphology of sand beaches in the Great Lakes usually consists of a ridge and runnel unit in the shallow, inner portion of the nearshore zone and one or more longshore bar and trough units in the deeper, outer portion. These two sets of features are morphologically and genetically different and exhibit spatial and temporal variations indicating the relative importance of environmental factors in controlling the form of each. </p> <p> Ridges and runnels form and evolve in response to a combination of the controlling factors of wave and water level variations. Ridge formation occurs in response to a rapid decrease in wave energy and lowering of the water level during the subsiding period of a storm. Ridges, with heights of 0.04-0.40 m, take 5-10 days to migrate 10-30 m across an inner nearshore terrace toward the shore. Ridge migration produces laminations dipping at 20°-30° toward the shore. Ridge attachment to the shore produces an accretional berm composed of laminations dipping at about 5° toward the lake. </p> <p> An annual cycle of erosion and deposition occurs in the inner nearshore and foreshore zones and is due to seasonal wave energy and water level variations. Erosion occurs in spring and summer because of rising water levels while the deposition of planar laminations dipping at less than 5° toward the lake is caused by lower water levels and higher energy waves in autumn. </p> <p> Based on the analysis of over 100 echo sounder profiles of the outer nearshore zone of 7 beaches, longshore bar and trough morphologic properties (maximum depth of bar formation, number of bars, and bar amplitudes), are controlled by three main environmental factors (wave energy or surf base, nearshore slope, and sediment size). Bars are present at depths of 3.5 m and at distances of 500 m from the shore, the number of bars ranges up to 6, and bar amplitudes range up to 2 m. Surf base ranges from 3-6 m, slopes from 0.009-0.02, and mean sediment size from 1.85 Ø - 3.30 Ø. There is a good correlation between the slope and sediment size. Temporal variation in bar morphology during the summer period of study is small or insignificant. </p> <p> Individual longshore bars probably only approach, rather than attain, equilibrium forms because of the temporal flucuations in the environmental controls of wave energy and water level. The geometrical trend in all longshore bar systems for the bar amplitude and spacing between bars to increase with increasing depth and distance from the shoreline, suggests a wave energy dissipation process which is somewhat analogous to dampened oscillation. </p> / Thesis / Master of Science (MSc)

This research paper was submitted to the Department of Geography in fulfillment of the requirements of Geography 4C6. / This study reports on the relationship between the foreshore slopes, grain size characteristics and the wave height on the Hamilton-Burlington Beach. This beach is a non-tidal, low-energy beach. At five stations along the beach, profiles were taken, sediment samples were collected and the average wave heights determined. The slopes were plotted against the mean grain size, the median grain size and the wave heights. There was no clear relationship between the variables tested. It was determined, however, that there existed three areas along this beach. The first area was he one affected only by the wave energy, the second are was affected by both the wave energy and the grain size characteristics, and the third region was affected by the grain size characteristics. / Thesis / Bachelor of Arts (BA)

<p> The beach at Manzanillo, Costa Rica, is composed of a mixture of terrigenous siliciclastic and marine calcareous sediment. The most abundant siliclastic grains are magnetite and diopside. The most abundant calcareous grains are red algae and molluscan fragments. These grains are found in much greater abundance in the beach sediment then in their source areas as a result of their resistance to breakdown.</p> <p> The distribution of the siliclastic minerals on the beach shows longshore drift to be from east to west. The main source of siliclastic sediment is the Rio Sixaola. Local rivers provide small inputs of sediment.</p> <p> The trace element chemistry of the beach indicates the possibility that some elements may be absorbed on the surfaces of grains as opposed to being substituted for other elements in mineral lattices.</p> / Thesis / Bachelor of Science (BSc)

The Blue Flag program is a French international eco-award for beaches, marinas, and tour boats. With a set of 33 criteria required for obtaining the award, the Blue Flag program has sites all over the world, but none in the United States. The American Shore and Beach Preservation Association (ASBPA) sought to change that and provided an opportunity for locations in the U.S. to apply for the award. One of those applicants was the Galveston Island Park Board of Trustees in Galveston, Texas. This thesis focuses on data obtained for the park board through a survey to determine beachgoer support and interest in the Blue Flag program. Data was collected through the use of a survey and ad hoc interviews during the summer of 2021. Examined through various theoretical lenses, the data was analyzed to determine its impacts on the local community, and its relationship with other historical conservation projects. The results for this project were provided through a paper report and presentation on the findings to the client and presented at the ASBPA National Coastal Conference in October of 2021.

A coarse-grain parallelization of SHORECIRC - a quasi-3D nearshore circulation model is implemented. The parallelization is based on the message-passing model for distributed memory architectures using the Message Passing Interface (MPI) standard. The parallel model confirms to the Single Program Multiple Data (SPMD) model. The results from the parallel model have been verified against those from the sequential model for an exact match. The parallel code is portable across different parallel architectures and its performance in terms of speed-up and scalability is studied. A test case simulating rip currents is discussed.

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Anyone who has been tempted to cross a beach or walk along a beach is aware of the potential conflicts that can arise between pedestrians and vehicles. The competing use of the beach space results in conflicts between vehicles and pedestrians; many times the pedestrian's disregard for signed pedestrian safety provisions in the close vicinity and on the space allocated for car lanes results in avoidable conflicts. This report addresses the pedestrian and vehicle interaction at Daytona Beach in Volusia County of the State of Florida. This report has consolidated accident data for the period January 1, 1977 through July 22, 1979. The information was obtained through the Volusia county Department of Highway Safety and Motor Vehicles. Based on this information, suggestions have been given for continued improvement of the traffic accident situation at Daytona Beach.

this house began as a desire to place a single floating mass on the horizon, but became an exploration of proportion, material, and volume, and how they relate to each other. / Master of Architecture