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<br /> FL'TURE FLOODS
<br /> ~ 0 0 0 0 8
<br /> only '0 Nre instance" hol~ , stre"," e"pcrienced COo lilr- 0 0 0 0
<br /> , 0 ~ , 0
<br /> . ~I
<br />'lest flo"d {Xls,"ible. ,;evere the:maxil'lUlT. knowr. nooo< """' . , ~ , . ~
<br />" milY rl rl rl rl
<br /> 0
<br />""0 CO 0 'liven _~tr"""', " i. generally accepted ,"", e ldr'ler I ,
<br /> "
<br />nood will OCCelr. Larg" floods haye been experienced ~tre"",~ I .
<br /> 00 .,
<br /> 0 ~
<br />.",ith "liniLir geographical 000 physiographical characteristics 0 0 0 0 0
<br />o. " 0 0 0 , 0
<br /> i " , rl , 0 0
<br />those ~tre= ill COo study Severe stonns undoubtedly ",i,ll . .
<br /> are". , " 0 0 0 , 0
<br />OCOUr '0 CO, Cuohar"s River woltersh"d '0 ,,,.Cl.se future floods ,"", , .
<br /> 0
<br /> I 0
<br />will equal 00 surP<lSS "'O~ hist"ric floods. Di"cu~sion 0' future
<br /> 0 ~
<br />floods '0 this report " limited <0 those ,"", have been designated ,
<br /> , 0 0 0 0 0
<br /> , 0 0 0 , 0
<br /> th" lOO-ypar '0' SOO.Y""T floorls, how<,v"r, da.t" Coo CO, lO-y""r , 0 . 0 0 0
<br />" , 0
<br /> 0 , . , , .
<br />.-,nd 50-year floods are presented. Descriptions 0< these possible "
<br />future flood" are found '" the Glos""ry 0' Terms section 0' this 'i
<br /> rl
<br />report. " ~ 0
<br /> i 0 0 0 0
<br /> 0 0 ~ > "
<br /> 0 0 . N 0
<br /> .
<br /> ;1 rl rl , , N
<br />nood Magnitudes and Their E'requoncies 0
<br /> "
<br /> Stllnd..rd hydrologio end !'ydreulic l"lethc<ls used 00 ~I ,
<br /> wer~ 00
<br />d~t_"r",in'o the "'"gnitUd" 0' ft,,,.,d,, 0' ~h~ 'Jel."."tc'd r"~"rn fr""r~e".cip". ~
<br /> 0
<br />, discharge-frequency rolationship '0. ". Cueh,,-"a" Ri.~e" ". .
<br /> was
<br /> "
<br />vdopBd from fn,qu"ncy 0' pua~. flows ,"'" com;tructed 0
<br />" CCl.tv>.> wa" 0 0 0
<br /> ~ 0 0
<br />f-rorn oJ.vaililblc str"",,,, datil. Regional frequency an"lyses . .
<br /> were . ., "
<br /> ~ 0
<br />used 00 develop discharge-frequency rela.tionship" '00 ", Middle . l
<br /> 0
<br />c,.""k 0" Hayes Reservoir drainago ", CorDS 0< Engineers' < ;i 0
<br /> areas. 0 0 0
<br /> i 0 . .
<br />IlEC-2 step-backw"ter computor used 00 dm:elop the flooded , . .
<br />progr"'" 0.. . ,
<br /> - -
<br />.~~.,~ :l."d Eood .,~,,'" ,~~ T.'l.!:.'le , "hO'....2 pC:l.l< ,';~n",~~~~ .of the 10- ~ ~
<br />c_____~_. ____u__,__ , .. ..
<br /> rl " . .
<br />SQ-, W(l-, "nd SOo-y,'ar fl"od~ ." ~"l"ctDd l.ooationR ,"c Cuehi\r"~ 0 ,
<br /> ()t1 ~ . ~ , ,
<br /> 0 0
<br />Riv"r "nd Middle Creek. Floods larger th"..." tho 50o-year flo<:>d , . , ~ 0
<br /> ,uc 0 ., ..
<br /> , . 0 . 0
<br />\.>O~aibl.., t~l~ ""mbin..ll,m ", f""t.or~ ~'w" , " 0 0 " 0 .
<br />"", "e''''~~''--'-y " produ"" 0 , 3 , , 0
<br /> ., ~ , " ~ 0
<br />lar')e nows would 00 extr"",ely 0 , , . , ~
<br /> rare. , 2 , .
<br /> 0 0 . ~ . ~ 0
<br /> Th" lOO-y""r fr"'1"""C;Y flood " definod flood h""i"g S " , 0 .
<br /> as , " , , , u ,
<br /> , , 0 0 < 0 .
<br /> , l , , , , " ~
<br />'" aver"g~ trC'luenGY ,,' ocCUrrenCe '" the order ,,' 0""" '" lOll-years " '- " rl , "
<br /> . < 8 0 " . ,
<br />" d"~'-,,,,,,~_f"] l""Mi"n, "HJ,,,,,,-,,, en" ,,~ '0 , " , u " ,
<br />., "'~y ...,,,,,,,,. ,'n". ....PM. " , ,
<br /> " " , .
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