Beaches Exam 2 Flashcards
What ways to hurricanes turn?
counterclockwise
WHat side is the worst side?
The east side with on shore forcing winds
What are the forcing factors?
storm size, hurricane winds, elevated storm water, storm waves, storm induced currents, duration of action, heavy rainfall
What is the grain size?
gravel >2mm
sand <2-0.0625
mud:silt and clay
How is sorting determined?
evaluated based on standard deviation, how uniform the sorting is.
What are the description of sorting?
very well sorted, well sorted, moderately well sorted, moderately sorted, poorly sorted, very poorly sorted, extremely poorly sorted
How do we measure sea level?
satellite and stilling well (same as tides)
What are causes of sea level change?
?
What has the sea level done over the alst 20,000 years?
it was 130m lower
20,000-8,000 rose 1 cm/year
8,000-3,000 rose 2mm/yr
3,000 to present 1mm/yr
How old are most deltas?
6,000-8,000 years old
sea level slowed
What is the definition of an estuary?
semi enclosed coastal body of water having a free connection with the open ocean, but measurably diluted by freshwater land drainage
What is a stratified estuary?
stagnant water- fresh on top, no mixing
What is a fully mixed?
fresh water and salt are completely mixed, very energetic
What forms a dune?
wind and sand
How does sand move along a beach?
long shore transport - up and down beach
short shore transport - on and off beach
