Lab9.CoastalGeology C O file:///Users/twyla/Downloads/Lab9CoastalGeology.pdf The
ID: 295644 • Letter: L
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Lab9.CoastalGeology C O file:///Users/twyla/Downloads/Lab9CoastalGeology.pdf The figure below is from a long-term study of sand movement at a beach near Carmel, California. It shows surveys of the progressive growth and retreat of the berm from the dates 4/21/46 to 2/21/47 Each line in the figure corresponds to the date when the beach profile was measured (it might help to trace each line in a different color to make the profiles more distinct) 6 Growth 4-14-46 ?221-47 -Petreat -20-46 2 Mean Level w Wate Tt 50 100 OFFSHORE (METERS) Lab 9 Questions 1. Based on the figure above, between April 21, 1946 and July 29, 1946 (i.e., during the spring and summer), did the berm: retreat, grow, or remain the same? (2 pts.) 2. Between September 4, 1946 and February 21, 1947 (i.e., during the fall and winter), did the berm: retreat, grow, or remain the same? (2 pts.) 3. Between September 4, 1946 and February 21, 1947, did the slope of the beach just below the berm become gentler, steeper, or remain the same during that time?(1 (1 pt.) E-OC103 Page 3 of4 Lab #9 4. What causes a berm to retreat from the sea? (1 pt.) 5. What causes a berm to advance toward the sea? (1 pt.)Explanation / Answer
lab 9 questions-
1) according to the given figure we can see this that on 21/46 the line of beam is having a gradual decreament and the reductions of the slope due to which the beam will be grow as the another date is showing and increamented value.
2) as we can see in this case that the curved on the graph is in overlapping conditions and thus it will be remain same.
3) in this case the beam become steeper due to the fact that the elevations and the spread of the off shore is in situation of the increased values witht the increament slopes.
4) the beam get retreat from the sea due to the phenomenon of the reflection due as a property of beam light.
5) it is due to the affinity towards the water during the refractions as the angle of incident reduces and thus it will emerged out into the water or towards the sea shores.
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