HCShore
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School
California State University, Sacramento *
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Course
103
Subject
Geography
Date
Feb 20, 2024
Type
docx
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3
Uploaded by ConstableSummerRedPanda36
It is time to assess the properties by figuring out how they might be affected by shoreline erosion. Determine whether the properties given are at risk for or safe from erosion by using your knowledge of the factors discussed earlier and information that is found at the Shoreline Erosion and
Streambank Erosion links.
Site 1 : Simpson- at risk
Site 1: Klaster- at risk
Site 2: Carter- at risk
Site 2: Froughton- at risk
Site 3: Property 1- at risk
Site 3: Property 2- safe
Site 4: Randall- at risk
Site 4: Wilson- safe
At Site 1, three groins are constructed. What would happen to the beach if the middle groin was not constructed?
There would be more erosion between the two remaining groins.
At Site 1, three groins are constructed. What would happen to the beach if five groins were constructed over the same distance?
The width of the beach will grow everywhere, but more significant erosion will occur on the downcurrent side.
Breakwaters are constructed to protect a portion of beach from wave action.
Over time, how might breakwaters become obsolete (essentially, no londer be needed) for a section of beach?
The sand could build up behind the breakwater so much that the beach connects with the breakwater.
The Clearwater River reaches the ocean just north of this beach. How might
damming the Clearwater River affect beach dynamics?
Damming the river would decrease the amount of sediment reaching the beach and cause the beach to shrink.
You are taking your family for a picnic along Muskett River. As you are trying to determine where to picnic, your priority is to place your family on
the side of the river where the water is moving the slowest. Where should you set up your picnic?
At a point bar
Rip-rap can reduce the velocity (hence, the energy and carrying capacity) of
the water in the river. How might placing a rip-rap along a streambank affect the beach where the stream meets the ocean?
More erosion could occur because the stream is carrying less sediment for its velocity than it should.
The Island Migration Case Study shows how Brown's Island in the Ohio River has migrated over time. The original map was published in 1954. The photo revision took place in 1983 and showed that the northern end of the island had eroded 5 feet (60 inches) over that time. At what rate was the northern end of Brown's Island eroding during that period?
approximately 2 inches/year
If Brown's Island were migrating at 1 foot/year, how long would it take to erode the entire length of the island?
almost 13,000 years
At what rate did the northern side of Clayton Point (Site 2) erode between the two maps provided?
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