Name______Date______Period______

Shoreline Webquest

Longshore Currents:

http://www.usoceansafety.com/safety/popup/lscurrent.asp

1.  What are longshore currents? ______

______

2.  Name 3 things that affect longshore currents

a.  ______

b.  ______

c.  ______

3.  How can longshore currents be dangerous to swimmers? ______

______

http://oceanservice.noaa.gov/education/tutorial_currents/03coastal2.html

4.  How can longshore currents affect beaches? ______

______

5.  Draw a picture of a longshore current:

Barrier Islands:

http://science.howstuffworks.com/environmental/conservation/issues/barrier-island.htm

6.  What are barrier islands?

7.  How far do barrier islands extend on the coast of North America?

8.  Name 2 ways in which barrier islands can form

a.  ______

b.  ______

9.  How are barrier islands beneficial in protecting coastal areas?

10.  Name 3 things that can change barrier islands and explain how these things affect barrier islands (Page 4):

a.  ______

b.  ______

c.  ______

Jetties/Groins:

http://www.beachapedia.org/Shoreline_Structures

11.  What is the definition of a groin?______

______

12.  What are groins designed to do? ______

______

13.  What problems do groins cause? ______

______

14.  Draw a picture of a groin:

15.  What is a jetty? ______

______

16.  What is the purpose of a jetty? ______

17.  What problems do jetties cause? ______

______

18.  How are groins and jetties different? ______

______

19.  How must jetties be maintained? What is bad about this? ______

______

20.  Draw a picture of a jetty:

Seawalls:

http://en.wikipedia.org/wiki/Seawall

21.  What is a seawall?______

______

22.  What is the purpose of a seawall?______

______

23.  Fill in the following chart on seawalls:

Advantages / Disadvantages

24.  Name the three types of seawalls:

a.  ______

b.  ______

c.  ______

25.  Draw a picture of a seawall:

Beach Nourishment:

http://www.brynmawr.edu/geology/geomorph/beachnourishmentinfo.html

26.  What is beach nourishment? ______

______

27.  Does beach nourishment completely stop erosion?______

28.  Name one advantage of beach nourishment ______

______

29.  Name one disadvantage of beach nourishment ______

______

http://www.capemay.com/Editorial/january09/beach-replenishment.html

30.  Draw a picture of a beach before and after beach nourishment: