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The Littoral Sand Budget, Hawaiian Islands
|Title:||The Littoral Sand Budget, Hawaiian Islands|
|Issue Date:||Apr 1968|
|Publisher:||University of Hawai'i Press|
|Citation:||Chamberlain T. 1968. The littoral sand budget, Hawaiian Islands. Pac Sci 22(2): 161-183.|
|Abstract:||Profile surveys were made across 80 selected Hawaiian beach and
nearshore environments at quarterly intervals for one and one-half years during
1962-63. Also 70 additional beaches were measured at less frequent intervals.
Using these profiles, supplemented by water-jet borings and measurements from
aerial photographs, the total sand volume of each of the major Hawaiian beach
systems was computed. The seasonal fluctuations of these volumes were also computed
and related to the wave and littoral current regimes.
The volume of littoral sand was found to be considerably less than the volume
for many sandy continental areas. About 4.0 X 10^7 cu yd of sand is held in
beach reservoirs on the seven major island s of the Hawaiian group; most is concentrated
on Kauai ( 1.4 X 10^7 cu yd) and on Oahu (1.0 X 10^7 cu yd). Individual
beaches containing more than 1 X 10^6 cu yd are Keawanui on Niihau; Hanalei,
Polihale-Barking Sands, and Kekaha-Nohili-Bonham on Kauai; Bellows-Waimanalo
on Oahu; and Papohaku on Molokai. The beaches on the island of
Hawaii hold the smallest volumes of sand.
Seasonal rates of erosion and accretion of beach sand reservoirs were found to
be generally on the order of a few tens of cubic yards of sand per linear yard of
beach per month . The higher rates were on exposed north and west coasts, with a
maximum rate of several hundred cubic yards of sand per linear yard of beach
per month recorded for Lumahai Beach, Kauai during 1962-63.
|Appears in Collections:||Pacific Science Volume 22, Number 2, 1968|
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