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<br />E100
<br />
<br />FLOODS OF 19'65 IN THE UNITED STATES
<br />
<br />7
<br />
<br />6
<br />
<br />PrecipitatjO~
<br />near Kento,~"'"
<br />
<br />~5
<br />~
<br />"
<br />"
<br />~
<br />~4
<br />Z
<br />o
<br />>=
<br />;,:,
<br />i:
<br />U
<br />~
<br />'"
<br />0.2
<br />
<br />;
<br />/,/.i
<br />
<br />,
<br />!
<br />
<br />,
<br />/'
<br />
<br />20
<br />15
<br /> >-
<br /> ~
<br /> ~
<br /> ~
<br /> "'
<br /> "
<br /> ;':
<br /> ~
<br />5
<br />
<br />/
<br />
<br />Stage, Cimarron
<br />River
<br />
<br />i
<br />
<br />
<br />,
<br />j
<br />!
<br />
<br />
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<br />
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<br />
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<br />
<br />Stage, TesesQuite
<br />-<,creek
<br />'--
<br />
<br />00
<br />
<br />o
<br />2000
<br />
<br />0500 1000
<br />OCTOBER 17, IN HOURS
<br />FIGURE ro.-Accumulated precipitation near Kenton and stage hydrographs of
<br />Cimarron River and Tesesquite Creek.
<br />
<br />1500
<br />
<br />The time distribution or this rainrall is given in figure 50,
<br />The maximum discharge !rom 27,5-sq-mi drainage area above the
<br />stage gage on Tesesquite Creek was 6,770 cis, based on an estimate rrom
<br />field surveys' or the channel. This discharge is equivalent to runoff or
<br />246 crs per sq mi rrom the basin or 0,38 inch per hour. Recurrence in-
<br />tervals cannot be computed ror areas this small; however, comparison
<br />or the peak discharge with that rrom 50 sq mi indicates that the peak
<br />discharge on Tesesquite Creek was probably much greater than that
<br />ror a 50-year flood.
<br />The occurrence or three crests in the creek, as graphed in figure 50, is
<br />probably typical or runoffs in tributaries upstream from Kenton. Se-
<br />quential flood peaks rrom recurrent storms over small drainage areas
<br />usually merge in the main river to rorm a sustained accrual in the flood
<br />wave. For this reason the flood - rrequency relations or the small streams
<br />would not correlate with those or large drainage areas.
<br />
<br />FLOODS OF NOVEMBER AND DECEMBER IN SOUTHERN CALIFORNIA
<br />
<br />Severe flooding occurred in southern Calirornia (fig. 51) in late
<br />November and in late December as a result or three great storms, Rain
<br />rell on most or the days during the periods November 13-26 and
<br />
<br />,
<br />
<br />1
<br />t
<br />
<br />S~RY OF FLOODS
<br />
<br />E101
<br />
<br />December 23-31. Most or the total was distributed in three periods-
<br />November 13-19, November 21-26, and December 23-31. More than 12
<br />inches or precipitation rell at Mount Baldy and at Big Bear Lake on
<br />November 23, and more than 15 inches rell at Mount Baldy on Decem-
<br />ber 29,
<br />Peak discharges were generally the greatest since 1943, The Los
<br />Angeles River at Sepulveda Dam and the Santa Clara River at the
<br />Los Angeles-Ventura County line had peak discharges greater than
<br />those or March 1963, the greatest previously known,
<br />Eleven deaths are attributed to the storms and the floods, and the
<br />amount or damage in the roothills and valley areas was estimated at
<br />more than $11 million, Flood -control, water-conservation, and power-
<br />production reservoirs effected a substantial reduction in the magnitude
<br />or the flood and prevented more exteru3ive damage in many areas,
<br />These floods are rully described in an open-file report by Hedman'
<br />and Pearsc)ll (1966). The report gives a general description or storm
<br />precipitation, floods, storage regulation, and flood damage, Maximum
<br />stages and discharges are given at 205 discharge stations, and detail
<br />stages and discharges are 'given at 22 selected stations.
<br />
<br />36'
<br />
<br />,"'.
<br />
<br />lIS'
<br />
<br />116"
<br />
<br />114"
<br />
<br />
<br />G
<br />
<br />,,\1'1'1- I
<br />"Q~~<> \
<br />o~ t
<br />~-f'. 1
<br />'~
<br />N","~,
<br />('-'
<br />.
<br />
<br />~ l(
<br />
<br />'-
<br />
<br />C~
<br />'^'
<br />Mount
<br />B:ldy - Big
<br />-""'"
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<br />,'"
<br />.'"
<br />
<br />'"
<br />
<br />
<br />E'4
<br />
<br />
<br />~c/.../
<br />C>
<br />uro_
<br />
<br />Are.
<br />of report
<br />
<br />o
<br />C>
<br />.,p
<br />...
<br /><t-
<br />
<br />,,.
<br />
<br />50 0
<br />" , I I I
<br />
<br />'I'
<br />
<br />100 MILES
<br />,
<br />
<br />FIGURE 51.-Flood area, November and December in southern California.
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