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City of Solana Beach
Section 3
Shoreline and Coastal Bluff Management Strategies Draft MEIR
Environmental Impact Analyses
Table 3.1-2
Coastal Retreat Rates in Solana Beach and Vicinity
Coastal
Retreat Rate
Landform
(ft/yr)
Study Period
Location
Source
Short-term rates based on measurements
Beach
2
1954-1988
Oceanside to Del Mar
Everts, 1991*
Seacliff
0.04
1970-1976
San Diego Coast
Lee & others, 1976*,
face
(average)
measurements
Seacliff
0.01
1970-1976
Solana Beach
Lee & others, 1976*,
face
measurements
Seacliff
0.04
1970-1976
Leucadia to
Artim, 1985,
base
(average)
Point Loma
measurements
winters of 1977-
1982
Seacliff
1.3-1.6
1972-1978
Del Mar Beach Club,
Kuhn and Shepard, 1979
base
south Solana Beach
(ancient river
channel)
Seacliff
2.7-4.5
January-April
Del Mar Beach Club,
Kuhn and Shepard, 1979
base
1978
south Solana Beach
(ancient river
channel)
Seacliff
0.26
~1978-2001
Del Mar Beach Club,
Jim Jaffee (Flick, 2001)
base
south Solana Beach,
south end of the
seawall
Long-term rates
Seacliff
0.19-0.36
1932-56 maps,
Solana Beach
Benumof and Griggs,
face
1994 imagery
(average of
1999, historical
0.27)
long-term rate**
Estimated rates
Seacliff
0.36 (no
empirical graph
Oceanside littoral cell,
Everts, 1991, long-term
base
mean annual rate
beach), 0.2 (at
erosion rate vs.
Reach 7 (Everts, 1991)
beach width
(Solana Beach)
long-term
mean beach
width ~80 ft.)
*USACOE (1996)
**Based on measurements over a 68-year period, caution should be exercised when using data extrapolated for over
a 100-year period for long-term predictions.
For the purposes of this study, a long-term average erosion rate in the Solana Beach area of
0.4 feet per year (or 40 feet in 100 years) was utilized. This was chosen considering the
relatively storm-free period (prior to the El Nino storms of 1982-83 and 1997-98 [Flick, 2001])
during which the data were collected, the historically greater amount of protective beach
sand, and the new data (by Graham, San Diego Union-Tribune, February 4, 2001) indicating
a greater potential for future erosion due to more wave energy from a more southerly storm
Project No. 323530000
Page 3-30






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