EM 1110-2-1100 (Part III)
30 Apr 02
Table III-2-1
Longshore Transport Rates from U.S. Coasts (SPM 1984)1
Predominant
Longshore2
Direction of
Location
Transport, cu m/yr Date of Record
Reference
Transport
Atlantic Coast
Suffolk County, NY
W
153,000
1946-55
New York District (1955)
Sandy Hook, NJ
N
377,000
1885-1933
New York District (1954)
Sandy Hook, NJ
N
333,000
1933-51
New York District (1954)
Asbury Park, NJ
N
153,000
1922-25
New York District (1954)
Shark River, NJ
N
229,000
1947-53
New York District (1954)
Manasquan, NJ
N
275,000
1930-31
New York District (1954)
Barnegat Inlet, NJ
S
191,000
1939-41
New York District (1954)
Absecon Inlet, NJ
S
306,000
1935-46
New York District (1954)
Ocean City, NJ
S
306,000
1935-46
U.S. Congress (1953a)
Cold Spring Inlet, NJ
S
153,000
---
U.S. Congress (1953b)
Ocean City, MD
S
115,000
1934-36
Baltimore District (1948)
Atlantic Beach, NC
E
22,500
1850-1908
U.S. Congress (1948)
Hillsboro Inlet, FL
S
57,000
1850-1908
U.S. Army (1955b)
Palm Beach, FL
S
115,000
1925-30
BEB (1947)
to
175,000
Gulf of Mexico
Pinellas County, FL
S
38,000
1922-50
U.S. Congress (1954a)
Perdido Pass, AL
W
153,000
1934-53
Mobile District (1954)
Pacific Coast
Santa Barbara, CA
E
214,000
1932-51
Johnson (1953)
Oxnard Plain Shore, CA
S
765,000
1938-48
U.S. Congress (1953c)
Port Hueneme, CA
S
382,000
---
U.S. Congress (1954b)
Santa Monica, CA
S
206,000
1936-40
U.S. Army (1948b)
El Segundo, CA
S
124,000
1936-40
U.S. Army (1948b)
Redondo Beach, CA
S
23,000
---
U.S. Army (1948b)
Anaheim Bay, CA
E
115,000
1937-48
U.S. Congress (1954c)
Camp Pendleton, CA
S
76,000
1950-52
Los Angeles District (1953)
Great Lakes
Milwaukee County, WI
S
6,000
1894-1912
U.S. Congress (1946)
Racine County, WI
S
31,000
1912-49
U.S. Congress (1953d)
Kenosha, WI
S
11,000
1872-1909
U.S. Army (1953b)
IL State Line to Waukegan
S
69,000
---
U.S. Congress (1953e)
Waukegan to Evanston, IL
S
44,000
---
U.S. Congress (1953e)
South of Evanston, IL
S
31,000
---
U.S. Congress (1953e)
Hawaii
Waikiki Beach
--
8,000
---
U.S. Congress (1953f)
1
Method of measurement is by accretion except for Absecon Inlet and Ocean City, NJ, and Anaheim Bay, CA, which were
measured by erosion, and Waikiki Beach, HI, which was measured according to suspended load samples.
2
Transport rates are estimated net transport rates QN. In some cases, these approximate the gross transport rates Qg.
n = in-place sediment porosity (n . 0.4)
The parameter n is a pore-space factor such that (1 - n) QR is the volume transport of solids alone. One
advantage of using IR is that this immersed weight transport rate incorporates effects of the density of the
sediment grains. The factor (ρs - ρ) accounts for the buoyancy of the particles in water. The term "potential"
sediment transport rate is used, because calculations of the quantity imply that sediment is available in
sufficient quantity for transport, and that obstructions (such as groins, jetties, breakwaters, submarine
canyons, etc.) do not slow or stop transport of sediment alongshore.
Longshore Sediment Transport
III-2-9
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