Littoral Sand Budget, Hawaii — Chamberlain 
TABLE 12 
Beach Sand Reservoirs, Miscellaneous 
Coastal Zones, Maui 
COASTAL ZONE * 
SUMMATION 
OF BEACH 
LENGTH 
( yards ) 
AVERAGE 
SAND 
volume! 
10 3 yd 3 
Opana-Hana 
1300 
52.0 
Hana-Hamoa 
600 
54.0 
Hamoa-Puu Olai 
1100 
44.0 
Puu Olai-Makena 
110 
9.9 
Kea wakap u-Ka lama 
1550 
139.5 
Waipuilani-Maalaea 
272 4 
408.6 
Maalaea-Papawai 
150 
6.0 
Papawai-Olowalu 
1420 
85.2 
Olowalu-Launiupoko 
1100 
99.0 
Launiupoko-Hahakea 
4620 
554.4 
Hahakea-Hanakaoo 
1500 
90.0 
Kaanapali-Napili 
5300 
477.0 
Fleming’ s-Honokahua 
385 
34.6 
Waihee-Wai Paoko Kaio 
2830 
113.2 
Wai Paoko Kaio-Kahului 
2400 
144.0 
Kahului-Spreckelsville 
2100 
252.0 
Spreckelsville-Paia 
1950 
234.0 
Paia-Opana 
650 
78.0 
* Listed clockwise from northern coast of island, 
t Volumes obtained from a single set of profiles in 1963, 
supplemented by aerial photographs and maps. 
other beaches along the southwestern and 
southern coast begin to accrete, and with the 
return of the northeast trades they undergo 
erosion. The behavior of the eastern beaches is 
not as clear; during the duration of the study 
they were generally eroding, but the data are 
incomplete. 
When the rates of accretion and erosion of 
171 
28 Oahu beaches (Table 17) were grouped 
into island sectors, the seasonal variation in 
the beach sand reservoirs was readily apparent 
(Fig. 6). With the commencement of winter 
Kona storms, the western beaches (leeward 
with regard to the northeast trades) erode 
rapidly. At the same time the beaches on the 
eastern side of Oahu accrete. With the cessa- 
tion of the westerly storms and the return of 
the northeast trades, the process reverses. The 
northern beaches follow the same pattern as 
the windward ones, accreting under Kona con- 
ditions and eroding under normal trade wind 
conditions. 
On Molokai, extremely rapid rates of change 
were measured at Kawaaloa and Papohaku 
(Table 18). Because nearly the entire beach 
sand reservoir is concentrated along the western 
sector of Molokai, the total Molokai beach 
reservoir fluctuates in a manner similar to the 
western sector reservoirs of Oahu and Kauai. 
With the commencement of Kona storms the 
Molokai beaches erode, and, during the periods 
of northeast winds and waves, they accrete 
(Fig. 4). 
On Lanai, low rates of change are indicated, 
except possibly at Polihua (see Table 19). Be- 
cause the major beach reservoirs are on the 
western end of Lanai, the Lanai beaches also 
fluctuate in phase with those of Molokai and 
of the western sectors of Oahu and Kauai. 
With the commencement of Kona conditions, 
erosion occurs. Under the northeastern winds 
and waves the beaches accrete (Fig. 4). 
TABLE 13 
Beach Sand Reservoirs, Selected Beaches, Hawaii 
SAND VOLUME, 
10 3 yd 3 
BEACH* 
4/62 
6/62 
9/62 
1/63 
4/63 
7/63 
AVERAGE 
Waipio 
372.3 
198.0 
120.1 
169.0 
242.9 
71.3 
195.6 
Hilo 
6.5+ 
4.0 
4.5 
5.5 
6.5 
5.5 
5.4 
Kaimu 
16. Of 
11.0 
11.0 
6.3 
16.0 
5.3 
10.9 
Punaluu 
8.8f 
9.8 
9.6 
9.0 
8.8 
10.1 
9.4 
Hookena 
15. Of 
17.8 
17.6 
15.4 
15.0 
14.3 
15.9 
Kealakekua 
3.5 
3.5 
2.3 
1.4 
1.6 
1.9 
2.4 
Disappearing 
Sands 
1.8 
3.8 
3.4 
0.8 
0.7 
2.2 
2.1 
Hapuna 
131.5 
127.0 
104.0 
102.5 
89.0 
129.5 
113.9 
Kawaihae 
4.6 
4.1 
4.5 
4.1 
4.1 
3.4 
4.1 
* Listed clockwise from northern coast of island, 
t Assumed value. 
