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<br />
<br />the summer months. There isrl.n' I1e:cor.d<il,t.' stream gaging stations in the
<br />watershed. Flood peaks were 'estilllated from precipitation recorded at
<br />
<br />Trlinitidad'hiRunOff wasideftielrt~t~d,~QJtm! acorrde~niattiionlolf rainfd alldi"'I'rtgunoff .
<br />re It ons p curves, ,11. '. re.:..im::ra)lSjatl .J. a oss epen on
<br />al1tecedent conditions~ 'iL'heestimated: runoff for each storm was applied
<br />to a synthetic unit 'hydrograph developed for the drainalge area ,above
<br />the dam site. The 14 Jtily 1948':fl\!l!l>!<il'p~t\k was $stimated by the sJ,.ope-
<br />area method from datafurnish'ed. by ,the city of Trinidad. . The 13 Juif
<br />1945 flood and the 25 JulyJ:950 :fli:lQdf!Wj!l]li'e correlated on a magnitrlde
<br />basis to the 1948 flood from informat;l.on obtained from local test.imony.,
<br />Flood peaks were estil1lated attheWiUow Street crossing (a point..
<br />selected to determine damllges'and beni!l;4ts) by increasipg the esti- . I
<br />mated peak discharge at the. dam sit,e Py the ratio of the square roots of
<br />the'i'espeotive 'drainage areas" i..The,efStimated floQJi Jl\llik\lisch~/lies for
<br />Pihcni Oahon lu.royo aresp.ownin. table'.J.,fQr the .peri9d":1914'",thrQ1J&h ,1950.
<br />.. , . ' ,. '.- '.', '^""., ,I,' I
<br />
<br />; "
<br />
<br />,'~! "
<br />
<br />, , '_' -f.'. .~ I :' \ ,,~
<br />TA;BLEl
<br />,,! i "', :!" <,':':,:,.:;"
<br />1J;SXmtTED PElAKDISCHl\RGES
<br />PIN6~~tANOI'l;1(fffiQYO,. 1914",50
<br />",<::1;"',;- ': t, \i1:,'; ,.J ,.',:. ,-, ',..,' .
<br />.!;' : ,p'lj!j~~scliarge ' :
<br />-,,' .' :, :'i ;','a~. .,' : .
<br />': 'danls:tte, ,(1), : .
<br />".1,:, (c:.f~s,.) .
<br />
<br />.,'1780'
<br />:,: ,; 1.400
<br />"."1200 '
<br />::1200, .
<br />,120b' ,
<br />i~9P,"
<br />,900
<br />130
<br />6$0'
<br />620:",.
<br />600..;
<br />600"
<br />590
<br />510
<br />
<br />
<br />':;"::,',h<:!~.
<br />
<br />..',:,
<br />
<br />':. . ,j, ~. ,,?
<br />
<br />. ,'). "i,',",I". '/.'..
<br />
<br />Date "if.' peak
<br />
<br />"" .' ,'.
<br />
<br />11.-;'''::'' ..
<br />
<br />Pe~ ~schar~e.
<br />"t"
<br />, ,a..
<br />Willow ',St. (2)
<br />. . "(ll~t:.S.)
<br />
<br />.
<br />
<br />,14.J\lJy'. 1948.~
<br />25 <tuly'i"" 1950 i
<br />22'July,"; 1925,'
<br />6-.'August 1929.:: ,;, ,
<br />13 July'" . 2945, "',
<br />28 September 1936
<br />24 July;; , 1928",
<br />ll"' Augu.str 1923,
<br />13Jcly, .... 1941
<br />5 September 1944.
<br />10 September 1918,,",
<br />27 June 1937
<br />21 August 1923
<br />8 October "1938 t, ,<',!
<br />
<br />2ciBd' .
<br />'1570. HI';
<br />1350'
<br />1350
<br />1350
<br />.1230
<br />1000
<br />820
<br />'. '.:',r...",
<br />730
<br />700
<br />" . ~~g . .;"~:
<br />,.'," 660":'"
<br />. ,(3) 570 ,
<br />. ..'..,'.', . ,.'.
<br />
<br />',.,. .. ,.
<br />
<br />'..'-.' " j',
<br />
<br />"
<br />
<br />.,:'\'
<br />
<br />,
<br />
<br />. :: ....". ' :~ . 'II :~ , ". ' ' ,.,. '.,
<br />(1) Drainagearea:\'l,14: square ndles." :: ';/."', ' i, i,,;',:.,
<br />(2)qjrl!;inage aIle a, ].'.42 square ,mi~~:.; ;,~" ',1;' " , " ,"
<br />(3)M1tiimUin ,eha~eF,capacity b~lo1'!"t,tw.,d~l~;j;~e ;",;:: ;',e ,c :::,:
<br />,:f,"'is,ao0ut ;,;>00 c.f.s,; ",,,,,;':..,'<'.1 .:f:, ",,',' ,t: ;)',""L,"l
<br />
<br />.' 2~~4. Use~ment data. - Th~ wat~;~he;d2~bove Pinori'Crili6nD~msite"
<br />has, a'drafnage,:,ilJ;'(;.!/i 'ot:,abou"Q ;1,;14:'1".!'J.U~fl'fmiles !l.l1\l v~~e~\ fro\,:,}'!leva-
<br />tiori.6l.5o"at'the'i dam site toabo!i1l:ie~ya1;.;i.ol1:,6800 at ..th~ ''!'I'e~~ ~p,~, ,~ft'
<br />
<br />:-:.:.)."(, '.'i
<br />
<br />-2-
<br />
<br />.
<br />
<br />Appendix I
<br />
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