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B34 FLOODS OF 195.5 IX THE U~;ITED STATES SOUTH PLATTE RIVER BASI~, COLORADO, JrXE 1965 B35 ~:_\:,ooo._,,-~~._--~--__ -_________ - --T o z o j -c"~rn'.n ;n-----' ~ ~ ~ :;, ~ ~ U " "' ~ 10_000.-- < '" :5 ~ ~ :5 ~ L o o o " . o J I , I The sites are numbered C'onsecutiyely in down::itream order, and these numbers identify the locations in figure 1. The permanent sta- tion numbers for the gaging stations correspond to the numhers in the annual reports. ;; ~ , < i :; )faximmn stages allll diseharge~ :tt, ;.!:agillg stations and mi~('t:l- JallE:'OllS sites wit.hin the Hood area are sllll1mal'ized in table 4. The !lum- bers in rhe first eoiullJll correspond to those in figure 1 to facilitate identification of the sift's for \~;hi('h flood <.lata are tabulated. The first column under "maximum flood pre\.iously h.-nown~' sho\ys the period of known floods before J line 19G5. This period is olten longer than the period of continuous records of discharge becilllse records of historical floods ha\"c been obtained. The last column contains two sets of llumbers. If the llumber is not footnoted, it is the recurrence inten'al of the .Tune 1;)65 peak dis- charge, in years; if the recurrence inter\"al of the .Jnne 1965 flood is more than 50 years} the number is footnoted, and is the ratio of the peak discharge in June ID65 to the discharge of the 50-year flood. ~ z SUMMARY OF FLOOD STAGES AXD DISCHARGES 0 < - " , ~ 25y( ~ /"\ i /n ~ , I --1 $ 3 i i -::J -i ., i -j , o '" $ . . co " , i 1 0: 1000350--- -300 I -250 200 150 MilES UPSTREAM fROM MOUTH i ~-_.._- "'0 " o J.o'lGl:RE 12.--- Relation of peak discharge and selected flood frequencies to lUiies abo,'e mouth. South Platte Ril"er. DATA FOR INDIVIDUAL SITES STREAMFLOW DATA The data tahuiated for each site where floodflows were determined may include a station description, a short table of daily mean dis. charges for the days comprising the flood period, and a list of stages and discharges at indicated times during the rise to. and the recession from, the flood peak. Only the station description is presented for miscellaneous sites. The station description contains .information concerning the loca- tion, datum, t.ype of gage, and drainage area. The method used to de- termine the stage during the flood period, the detinition of the stage- discharge relation. and the conditions that might ha"e affected that relation are explained. The maximnm stage and (or) discharge at eaeh site are 1!i\~en for the flood period ill.T;me 1965, fOl' the indicated period of discharge record, and for floods prior to the period of record. Remarks Oil regulation and di,'ersions and other pertinent information are included where applicable. Tables of stages and discharges at. indicated times arc included so that these data and the daily mean discharges before and after the detailed period can be used to define both stage and discharge hydrogmphs. indirect measurements of the peak flow hy the slope-area method, com- putations of rlow through contractions such as bridges and cllh-erts and oyer dams and road embankments, or a combination of these methods. ~\t miscellaneous sites where high rltlloft' oceurred, the peak discharges were determined by indirect measurements. .A total of 2~ in(lirect measurements were made; 12 at acti\.e or discontinued g'ag-ing stations and Hi at miscellaneolls sites. EXPLAXATION OF DATA J)(.tailed Hood information, ill addition to that in the regular allllual I'('ports of the Geological ~l1n.e'y, is eOlllpiled lwre for use in future hydraulic and h'ydrolo~i(" studies. Heeords of stage and. discharg-e at 24 gaging stations, elenltiollS and ("()lIlpllts of one l'eseJToir, and ppak discharges at 2,) miscellaneous f;ites are gin.n.