Littoral Sand Budget, Hawaii — Chamberlain 
167 
TABLE 5 
Beach Sand Reservoirs, Selected Beaches, Oahu 
BEACH* 
SAND 
VOLUME, 
10 3 yd 3 
5/62 
7/62 
11/62 
3/63 
5/63 
8/63 
AVERAGE 
Laie 
197.2 
219.3 
180.2 
221.0 
205.7 
163.2 
197.8 
Hauula (N) 
26.0 
20.0+ 
22.7 
40.0 
21.3 
18.0 
24.7 
Hauula 
13.0+ 
17.8 
15.4 
14.4 
13.0 
14.9 
14.8 
Punaluu 
59.0+ 
64.2 
59.8 
66.9 
59.0 
56.3 
60.9 
Kahana 
305.8+ 
305.8 
444.4 
522.5 
500.0+ 
496.1 
429.1 
Kailua (N) 
74.0 
97.5 
114.0 
89.3 
85.8 
134.0 
99.1 
Kailua 
35.2 
55.2 
52.9 
70.5 
49.4 
45.8 
51.5 
Kailua (S) 
37.6 
45.8 
70.5 
95.2 
67.0 
99.9 
69.3 
Lanikai (S) 
170.2 
179.4 
177.6 
192.4 
112.8 
198.0 
171.7 
Waimanalo 
942.2 
981.7 
704.6 
823.9 
650.6 
746.9 
808.3 
Waimanalo (S) 
254.1 
284.9 
157.8 
146.3 
219.4 
304.2 
227.8 
Makapuu 
19.6 
35.0 
36.0 
32.0 
10.6 
18.0 
25.2 
Sandy Beach 
142.0 
138.0 
101.0 
132.5 
112.0 
106.5 
122.0 
Kahala 
29.1 + 
31.2 
25.0 
35.4 
29.1 
37.4 
31.2 
Natatorium 
11.5+ 
10.7 
9.0 
21.3 
11.5 
10.2 
12.4 
Kuhio 
76.8+ 
91.2 
79.2 
80.4 
76.8 
85.2 
81.6 
Ewa 
174.0 
195.0 
177.0 
123.0 
123.0 
138.0 
155.0 
Kalanianaole 
24.0 
82.8 
33.9 
29.2 
43.2 
43.1 
42.7 
Maili 
933.9 
897.6 
828.3 
504.9 
699.6 
848.1 
785.4 
Pokai 
32.8 
40.0 
35.6 
30.2 
30.4 
41.6 
35.1 
Makaha 
148.1 
191.6 
138.0 
33.5 
76.4 
116.6 
117.4 
Keawaula 
24.0 
238.8 
81.6 
43.2 
182.4 
247.2 
136.2 
Camp Erdman 
92.4+ 
93.8 
79.8 
109.2 
92.4 
95.2 
93.8 
Mokuleia 
32.0+ 
61.0 
69.0 
35.0 
32.0 
46.0 
45.8 
Waialua 
5.8+ 
4.2 
3.9 
4.9 
5.8 
7.0 
5.3 
Kawailoa 
66.0+ 
71.4 
52.2 
41.4 
66.6 
76.2 
62.4 
Waimea 
109.4 
96.2 
85.5 
99.0 
45.6 
53.9 
81.6 
Sunset 
241.6 
417.6 
273.6 
406.4 
376.0 
393.6 
351.5 
* Listed clockwise from northeast coast of island, 
f Assumed value. 
ability of this reef flat reservoir and the rapid 
transport of sand from it onto the beach. 
River Mouth. Sand-size material derived 
from the erosion of the hinterland is trans- 
ported by streams and rivers to the ocean. Fol- 
lowing initial deposition at the mouth of the 
streams and rivers, much of the sand is moved 
along through the littoral system on and off 
the beach and eventually is carried out into deep 
water, blown inland, or otherwise lost. 
In the Hawaiian Islands the largest river- 
mouth sand reservoir is off the Waimea River, 
Kauai. The exact volume of this reservoir is 
not known, but subsurface probings have shown 
that over an area of about one square mile off 
the Waimea River the sand thickness is greater 
than 20 ft. Consequently, a sand reservoir on 
the order of 10 7 cubic yards is indicated. 
Smaller river mouth reservoirs are found off 
several other Hawaii rivers, notably Hanapepe 
and Hanalei, Kauai. 
Selected Beaches. Whereas an accurate vol- 
ume measurement of the total beach sand reser- 
voir for the Hawaiian Islands was fairly easily 
obtained, similar measurement for the total 
nearshore sand reservoir was not possible. The 
difficulty lay in obtaining a sufficient number of 
submarine measurements, compounded by surf 
and current conditions that in many localities 
prevented direct bottom measurements. Conse- 
quently, it was possible to measure only por- 
tions of the nearshore sand reservoir off certain 
selected beaches. The integration of these lim- 
ited data over extended lengths of the coast is 
prevented by the extreme variability of the size 
of sand channels and sand pockets. At best the 
data can be used to indicate the relative vol- 
