Beach Investigation
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Beach Investigation Lab
Date: 4/17/20
Physical Geology
Beach Investigation Lab
Respond to the prompts below once you have completed plotting the profiles on the corresponding Beach Profile graph. Your responses must be in your own words and thoughts. There are eight questions
and two optional extra credit questions.
Section 1: Beach Profiles
In order to answer the following questions, you must first complete the lab Reading and plot the
three beach profiles on the Beach Profile Graph. (10 points: 3 points per profile, 1 point for
labels)
1.
Refer to the restored beach curve for July 1989
on the Beach Profile Graph to answer the
following questions. (2 points)
a.
What is the distance (in feet) from the dunes when the July 1989
curve starts to drop in
elevation? {
300
}
b.
What is distance in feet from the dunes when the curve starts to increase in elevation
from the eroded 1989
beach
{
50
}
c.
Subtract 1b from 1a to determine how many feet was the shoreline extended outward
immediately after beach restoration in July 1989
. {
-250
} 2.
Similar to Question 1, refer to the restored beach curve for July 1991
on the Beach Profile
Graph to answer the following questions. (2 points)
a.
What is the distance in feet from the dunes when the July 1991
curve starts to drop in
elevation? {
225
}
b.
At what distance from the dunes do the July 1989
and July 1991
profile curve start to
separate from each other?
{
250
}
c.
Subtract 2a from 2b to determine how many feet was the shoreline eroded after the
beach restoration in July 1989.
{
-25
}
Page 1
of 4
GLY1010L - Physical Geology Lab- c.2457711
Beach Investigation Lab
3.
In a brief paragraph, give a possible explanation for the change and beach profile from July
1989 to July 1991. Why did the beach erode? Consider what physical structures and forces of
nature can erode beaches in Florida. (3 points)
I believe the beach erode because global warming happens along with natural weathering. I also
think the rain and storms contribute a huge role as well, due to the rain pushing down into the sand and breaking it down, allowing water to move inward towards the beaches profiles eventually changing them.
4.
Examine the completed profile of Dr. Von D. Mizell-Eula Johnson State Park. What is the
height (elevation) of one rectangular unit? What is the distance of one rectangular unit?
What is the area of a unit? Show your calculations for credit. (2 point) Area per unit square (ft
2
): 5100
{
10.2
} ft * {
500
} ft = {
5100
} ft
2
5.
Count the number of units that lie completely within the area between the eroded (July
1991) and reconstructed (July 1989) beaches above sea level (MSL)
. Record your answers in
Worksheet A, below. (2 points)
133
6.
Similar to Question 5, count the number of partial units that are crossed by the eroded and
reconstructed profile within the area between the eroded (July 1991) and reconstructed (July
1989) beaches above sea level (MSL)
. Record your answers in Worksheet A, below. (2 points)
169.2
Page 2
of 4
GLY1010L - Physical Geology Lab- c.2457711
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