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GLY 4734

GLY 4734. Why is the coast important to study?. Societal Reasons Hazard/Event-based Reasons Geologic Reasons. Societal Reasons - Coastal Population.

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GLY 4734

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  1. GLY 4734

  2. Why is the coast important to study? Societal Reasons Hazard/Event-based Reasons Geologic Reasons

  3. Societal Reasons - Coastal Population 30 coastal states contain 62% of US population and 12/13 largest cities53% of US pop. lives w/in 50 miles of the shore (83% in Australia)in 1973: 440,000 km of global coastline / 3.3 billion humans = 13 cm eachtoday: 440,000 km of global coastline / 6.7 billion humans = 6.5 cm each

  4. Societal Reasons – Coastal Development Development along our coastlines continues to expand Sand Key, FL

  5. Societal Reasons – Coastal Infrastructure Populations Pressures Transportation Safety Infrastructure Alsea Bay, Waldport, OR - Photo credit: Paul Komar

  6. Societal Reasons - Agricultural Example: Nile Delta Concept of dynamic equilibrium Construction of Aswan Dam has shut off sediment supply Result: rapid coastal recession rates = 50-100 m/yr

  7. Coastal Hazards - Hurricanes

  8. Hazards/Climate Reasons – Example: Hurricanes Ivan and Katrina LIDAR data - newish technology Dauphine Island, Alabama

  9. Hazards/Climate Reasons – Landform changes caused by the storm events LIDAR surveys - Dauphine Island, Gulf Coast of Alabama

  10. Gainesville Hazards/Climate Reasons - Sea Level Rise

  11. Hazards/Climate Reasons - Sea Cliff Retreat Examples

  12. Biota, Habitat, Ecological Reasons Lithologic Response Wave Energy Imparted to Coast Uplift Sea Level Change Beaches Offshore Wave Climate Wave Transformation

  13. Geologic Reasons – Generation of Stratigraphy Lithologic Response Wave Energy Imparted to Coast Uplift Sea Level Change Beaches Offshore Wave Climate Wave Transformation

  14. History of Science of Coastal Geomorphology Greeks (Herodotus) and the Nile 'delta' da Vinci and the Pontine Marshes in Italy - 15th century Captain Cook's voyages shed light on many coastal reaches worldwide Early geologists (Hutton, Lyell) recognized the coast as a modern depositional environment responsible for sedimentary rock generation. Early geomorphologists (de Beaumont, Huxley) identified the link between process and form along the coast. Darwin theorized on the origins and evolution of reefs and atolls. Even Grove Karl Gilbert interpreted abandoned terraces in Utah to testify to the presence of Pleistocene lakes in the western U.S. Early 20th century: Douglas Johnson's application of William Morris Davis's "geographical cycle" -New England coast World War II and in the Cold War era which followed - scientists at Scripps Institution of Oceanography (Sverdrup, Munk, Shepard, and Inman) Lithologic Response Wave Energy Imparted to Coast Uplift Sea Level Change Beaches Offshore Wave Climate Wave Transformation

  15. Name and where are you “from”? What coast are you most familiar with or are you currently interested in? What are some issues there that grab your attention? During the semester, consider how each topic we cover affects your coast (i.e. tectonics, wave climate, sediment supply/local rivers, population/human infrastructure, hazard vulnerability). I'll start with an example... In-Class Exercise

  16. South-Central Alaska

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