mat95 weeks 1-3 Collaborative Project- (1)
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School
Wilmington University *
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Course
095
Subject
Geography
Date
Feb 20, 2024
Type
docx
Pages
4
Uploaded by MinisterWater41784
Collaborative Project: Weeks 1-3
Building a Seawall
Overview
In this activity you will design a seawall to protect a major coastal highway from erosion by ocean waves and address these questions: Erosion–can you fight it? How much energy is involved in waves and erosion? Can humans stop the erosion of the shoreline? Should we? Is it cost-effective?
Procedure
Problem Statement
Your engineering team has been charged to submit a bid for a design for a 600-meter seawall to protect a major coastal highway in Delaware. Your team must design the wall right at the edge of the water. The structure must be able to withstand the impact of the ocean waves. You cannot spend any more money on the project than is necessary, so it is crucial that the team know what materials can be used in construction and how much each material will cost. It is also important to know that there will be no funding available for beach nourishment (replenishment) in the future. Your design must help control beach erosion.
To determine the amount of wave energy, use an equation to calculate the amount of energy based on the height of a wave. First, determine the amount of energy for every square meter of the wave, the energy (joules) is equal to 1260.6 times the square of the wave
height.
Wave Energy
=
1260.6
∗(
waveheight
¿¿
2
)
¿
2. To determine the Total Energy in a wave, calculate the total surface area of the wave and multiply that by the wave energy.
Total Energy
=
Wave Energy
∗(
surfaceareaof the wave
)
For example, calculate the energy for an average open water wave that is 2 meters high, 7 meters wide and 500 meters long:
Wave Energy
=
1260.6
∗(
waveheight
¿¿
2
)
¿
Wave Energy
=
1260.6
∗
2
2
Wave Energy
=
1260.6
∗
4
Wave Energy
=
5042.4
joules
/
m
2
Total Energy
=
Wave Energy
∗
Surface Area
Total Energy
=
5042.4
∗(
7
∗
5
)
Total Energy
=
5042.4
joules
/
m
2
∗
3500
m
2
Total Energy
=
17,648,400
Joules
3. Along the Delaware shoreline wave heights average 3 meters. These waves will be 8 meters wide, and the section of the seawall that the waves will hit is 300 meters long.
4. Calculate the Total Energy of the wave. Record it here: 27,228,960 Joules
.
5. Using the table of materials below, your team must design a wall to withstand the wave energy calculated above.
Material
Strength
Cost/cubic meter
Amount needed
Total Cost
Natural Rock 30 million joules $50/cubic meter 900 cubic meters
$45,000
Masonry
40 million joules
$150/cubic meter
300 cubic meters
$45,000
Wood
4 million joules
$25/cubic meter
2000 cubic meters
$50,000
Steel
90 million joules
$225/cubic meter
300 cubic meters
$67,500
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