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<br />E6
<br />
<br />FLOODS OF 1965 IN THE UNITED STATES
<br />
<br />frequency reports used, the data limit the det=ination of recurrence
<br />intervals to 50 years. In a few reports the limit is less than 50 years.
<br />The severity of a flood whose recurrence Interval eX'COOds the limit of
<br />determination is expressed as the ratio of its peak discharge to the dis-
<br />charge of the flood that has a recurrence interval equal to the limits of
<br />determinwtion.
<br />
<br />SUMMARY OF FLOODS
<br />FLOODS OF JANUARY AND FEBRUARY IN HAWAII
<br />
<br />After STUART H. HOFF ARD (1965)
<br />
<br />Damaging floods occurred in January and February in four is-
<br />lands-Kauai, Maui, Oahu, and Molokai. Two weather fronts invaded
<br />Kauai on January 5-6 and January 9-10, On January 5-6 the rainfall
<br />was relatively uniform over the island, and every rain gage registered
<br />more than 2 inches of rain; 3.5 inches was common along the southern
<br />coast, and between 4 and 5 inches of rain fell in several areas. Most
<br />of the rain on January 9-10 fell in 7 hours, and at some places the
<br />intensity was greater than 2 inches per hour. The total rainfall of
<br />January 9-10 was greater than that of January 5-6 except in an area
<br />from Wailua to Makahuena Point. Rainfall at many gages exceeded
<br />4 inches and at several gages exceeded 6 inches. Rainfall was heaviest
<br />in a small area on the southern coast near Hanapepe-Makaweli re-
<br />ceived 7,77 inches of rain, and Eleele received 6.32 inches. In northern
<br />Kaual, Wainiha had 4.86 inches of rain, and Kilauea Plantation had
<br />3.95 inches. .
<br />The rains of January 5-6 caused high stages in the Wailua, Hana-
<br />pepe, and intermediate basins (fig. 2) but no flooding. The heavy rains
<br />of January 9-10 sent water pouring over the highway at six places
<br />between Kalaheo and Waimea. Runoff from Hanapepe Height flooded
<br />a section of Hanapepe behind the new levee on the west bank of the
<br />Hanapepe River, Heavy crop damage occurred in the Hanapepe-
<br />Waimea area. Flood damage in the Kalaheo-Waimea area was $12,000
<br />to public property and $158,000 to private property. Although rain-
<br />fall and runoff were intense on Kauai, no record peak discharge oc-
<br />curred at any gaging station with 10 or more years of record (table 1)_
<br />On January 23 heavy rains fell along the east coast of Maui, from
<br />Paakea where 8.12 inches fell, southeastward to Hana where 7.85 inches
<br />fell, and to Hanahuli where 8,46 inches fell (fig. 3). At Kaupo Ranch,
<br />4,52 inches fell at an altitude of 500 feet, and 7 inches fell at an altitude
<br />of 3,570 feet,
<br />
<br />1-:
<br />I
<br />
<br />i
<br />\
<br />I
<br />
<br />I
<br />
<br />SUMMARY OF FLOODS
<br />
<br />
<br />oMana /'
<br />---------..
<br />/'
<br />
<br />EXPLANATION
<br />
<br />.,
<br />Flood-determination point
<br />Numbercorrespl)'l'Uisto
<br />th4tintablel
<br />
<br />Makahuena Point
<br />
<br />5 0
<br />I I I , , I
<br />
<br />5 MILES
<br />I
<br />
<br />FIGURE 2.-Location of flood.determination points, floods of January 5-9 in
<br />Kaual, Hawaii..
<br />
<br />TABL~ I.-Flood stages and discharges, January in Kauai, Hawaii
<br />
<br />Maximum lioods
<br />
<br />No. Stream and place of determination
<br />
<br />Drainage
<br />"..
<br />(sqmi)
<br />
<br />Peaks of Gage
<br />January height
<br />1965 (feet)
<br />
<br />Known before
<br />January 1965
<br />Period Year
<br />
<br />1 Kawaikoi Stream near Waimeah___.
<br />
<br />4.11909-16, 1916
<br />1919-64.
<br />
<br />'"
<br />7.42
<br />19.3
<br />1236
<br />lU7
<br />7.58
<br />a83
<br />19.82
<br />lare
<br />22.'
<br />la23
<br />19.88
<br />7."
<br />lU
<br />~..
<br />
<br />2 Walmea. River near Walmea__._u.n_
<br />
<br />u._.nuuunuu. 10
<br />57.81910-19, 1949 __..._uu
<br />1943-<!-
<br />
<br />3 Hanapepe River below Manuahi
<br />Stream near Eleele.
<br />
<br />18.8 -i9ii':zi,-hmi96iu
<br />1926-6<.
<br />
<br />10
<br />
<br />4 Hulei8Streamnea.rLihue._..uuuu
<br />
<br />uuuuu_.....u._ 5
<br />17.6 -i9ii=i6;uh-i963--_______~~_
<br />1962-<4.
<br />___uu.......__.u_ 10
<br />22.4 1911-Muu 1963 _uuWu
<br />___.uunnuunu 5
<br />18.7 1952-64____ 1955 m"_'_"
<br />__nuu_n_n_nu_ 5
<br />10.2 1952-64__n 1956 uumm
<br />,
<br />
<br />5 SouthForkWaUuaRivernea.rLibueu
<br />6 North Fork Wailua River near Kapaa.
<br />7 WainihaRlvernearHane.leLu._nu_
<br />
<br />E7
<br />
<br />Kapaao
<br />
<br />ailua
<br />
<br />D"-
<br />~.
<br />
<br />10,700
<br />1,760
<br />37,100
<br />13,300
<br />39,000
<br />6,480
<br />4,980
<br />13,200
<br />7,120
<br />87,300
<br />11,100
<br />",200
<br />..',.
<br />40,000
<br />4,870
<br />
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