. Beach changes at Atlantic City, New Jersey (1962-73). Beach erosion; Coast changes. Landward Boundary Survey A H AS. Unit Distance Parallel to Shore Figure 26. Change in unit storage volume at profile line, AV. intensity. Seventeen storms, predominantly northeasters, were selected for analysis based on the following criteria (see Table 5): (1) Existence of prestorm surveys no more than 4 weeks before the storm and poststorm surveys no more than 1 week after the storm; (2) data indicating wave heights of meters or greater dur- ing the storm (this value was arbitrarily chosen due to the 0
. Beach changes at Atlantic City, New Jersey (1962-73). Beach erosion; Coast changes. Landward Boundary Survey A H AS. Unit Distance Parallel to Shore Figure 26. Change in unit storage volume at profile line, AV. intensity. Seventeen storms, predominantly northeasters, were selected for analysis based on the following criteria (see Table 5): (1) Existence of prestorm surveys no more than 4 weeks before the storm and poststorm surveys no more than 1 week after the storm; (2) data indicating wave heights of meters or greater dur- ing the storm (this value was arbitrarily chosen due to the meter value for mean wave height determined by Thompson and Harris, 1972); and (3) no other known significant weather events occurring between surveys. Visual observations indicate that the predominant breaking wave directions during storms are from the east and southeast. Wave breaker types most com- monly observed were either plunging or spilling (Urban and Galvin, 1969). Analysis of the selected storms for which actual tide data were available demonstrated an average maximum storm-generated surge at high water of meter. An effect which must be considered is the timelag between the storm and the poststorm survey which varies from 0 to 6 days. The greater the lag, the more probable that the beach has already begun recovering, thereby not indi- cating the total storm change (Birkeraeier, 1979). (See App. C for plots of prestorm and poststorm surveys.) Figure 27 depicts the mean and standard deviation of unit volume changes above MSL, by profile, for the selected storms. Due to the relatively few storms analyzed, this information provides only a possible trend of unit volume changes at each profile line. Profile lines 2, 5, 6, and 7 underwent the greatest average unit volume loss of 6 cubic meters per meter or greater during these storms. This is partly explained by the fact that the general direction of longshore transport during storms is from northeast to southwest
Size: 2365px × 1056px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity
