task 8
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Task - What Happened to the Coastline? Introduction
From atop the crow's nest, One-Eyed
Josephine hollers, "Land ho, port side!"
The crew members drop their mops and
buckets to race to the left side of the
ship. You slowly lower your face into your
hand. "Your other left, port side refers to the left side of the ship." Josephine was
correct; to the west you can make a
series of landmasses, or islands.
"Welcome to the Caribbean Sea mateys," the Captain says with
a smile. "Weather permitting, it's approximately seven good
sailing days to Florida. There's but a few items left for you to
tend to aboard the ship. For those of you that like coffee,
there are many coffee-producing countries here in the
Caribbean. If you want a pit stop at any of the islands you can
get some duty-free coffee beans."
As the ship approaches the Caribbean Islands, you notice the
beaches aren't what one might expect: the beaches are thin
and there's a lot of housing and development along the
coastline. There are many man-made structures constructed
in the water in attempts to modify the coastline, such as
jetties and groins. Oh dear, what is happening?
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The Captain's Orders Read the log book Seashores and Coastlines to learn about how humans have modified the coastline to suit their own
needs and desires and the effects it has on the environment.
Answer the questions below in complete sentences and
complete the following tasks using the log book and your
internet ready computer.
Objective Explore coastal processes and the effect of human attempts to
modify coastlines.
Task Questions 1. Which process dominates the East Coast of the United
States, deposition or erosion? Why?
2. Which process dominates the West Coast of the United States, deposition or erosion? Why?
3. What is the rate of sea level rise increase today?
4. What is the projected height for 2100?
5. During what month of the year would you expect the
berm on the beach to be smallest? Why?
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6. During what month of the year would you expect the
berm on the beach to be largest? Why?
7. What are the two primary sources of all beach sand
globally?
8. What are the two primary sinks for all beach sand
globally? I.e. what causes the decrease in beach sand?
9. Scenario: You live on the beach in a residential area.
Your neighbor builds a groin. You are down current from
the groin. What will happen to your beach? What are two
different options you can pursue to save your beach?
Quiz Questions 1. Which of these coastal structures is installed specifically
to prevent coastal erosion?
A. seawall B. jetty C. groin D. breakwater
2. Which of these coastal structures is installed specifically
to create protected low-energy water for boats?
A. seawall B. jetty C. groin D. breakwater
3. Which of these coastal structures results in bigger
beaches in a particular location?
A. seawall B. jetty C. groin D. breakwater
4. Which of these coastal structures results in increased
erosion in a particular location?
A. seawall B. jetty C. groin D. breakwater
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5. Which of these coastal structures results in increased
wave height in a particular location?
A. seawall B. jetty C. groin D. breakwater
6. Which of these coastal structures requires continued
maintenance?
A. seawall B. jetty C. groin D. breakwater
Drawing in the Sand Draw a picture of a beach with a groin constructed near a
beach resort hotel. Be sure to clearly indicate where the sand
accumulates, where it erodes, and the direction of longshore
current. List two reasons why the resort would want to build a
groin. List two negative side effects of building the groin.
Creativity and originality can earn you extra credit.
How to Submit Your Task Answer the Task Questions on a word processing document
and submit the document to the Captain's dropbox.
Answer the Quiz Questions in a separate word processing
document and use your answers to complete the Coastlines
Quiz. Beware the letters in the list of answers above may not match the letters in the list of answer on the quiz. There will be more quiz questions in addition to these, be sure you
understand the material in the log book.
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Submit your beach image along with the pros and cons to the
Captain's dropbox.