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<br />Materials ~ : /:?<;~~__r-~, _ ~ '
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<br />In addition to the fo'l'i'6win,i'materials whicl1.ohave been
<br />provided for your use, colcr6d' pencitlS, an erase'r... and a straight
<br />edge will be-'helpful in com'pleting this exercise: I
<br />. ,. ;"'"
<br />
<br />a ,topographic map of ,th~ re9'i8n" scale~of 1 irrch~.a-, ,..'>5'-
<br />miles,showing the st~dy',reach' _' r, -::.' <.-
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<br />ea g:;apn of,p:eax <;1is,2harg~. vs:dr~inage 'arett;:~~bh~~~l '\ '~\",7 (
<br />regl.on (Hyq.rologl.c' Analysl.s) '. ; I~'v.-~> .:>; ",.~''',*,vJ..:1\! st"onle.:l. .',,\ ~ .'
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<br />"_,---a detail~dt~pographic.~p--<;)f:tl;~.:stUd~re,~cb_-,sh9\iiinq..:: : '~_~"
<br />'~channel.::stat..l.ol)iM __aAd-",~,0:'1.s~1!!et1.9n."locat,l.Ons-=:c' :__. . "._:/:-,-:,v';."I'; ~,!
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<br />. a._.graph,:cof'.the: streaJl! ,channeL 'prof:tle. ',", . .---- , ' , ,,'.c'\ : ,'>"
<br />'_ ,::_..:.,....,\._,1]1,.. ....:..____~.,.... '.;'; r"" '.. --'--. ".~.,'.",'\.. ,..-l'.......i.'
<br />,-.. e: a list oLwatei:.'sl1rfaCe-elevationll>at each 'cross-::sec:tion<:"~':::::";
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<br />(Hyaraul'i:'.A;~al~:~:)-j?;,,'\: :':;)'\..' .." :,,:,/~,,";}':};.:~':.~ :ii~~J,',
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<br />Procedure .......r. ~~_:.:.. _..:-.. ,-' ,__' :_ \~ " l":~ . 'J u "1 \ "'-"'-" - ~".\.-."
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<br />The following: tasks' ha'ilii -bee!l-).1.st:ed(to' a$sist~ou in " , ',' r"-
<br />,..' sOlving this assignnientin a-:J,ogicai' o~d~i:-.' '. '.' :.:' /> ':C-', <',
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<br />regi6naF:.=map,- ,starting "nea~ ',the. confluence of.;":'",,' . ,j';' ,
<br />Creek ,with --the E~gle.Rj.yer 'at. Avon, dra.i'-,i.line up ,
<br />Creekto'--i'ts -headwate_rs ':ab'oye Upper T'Urquoise::Ii~~~.?':'~(
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<br />draw' t.he'drainage>:
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<br />Starting at the downstream s,tudY
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<br />3. Estimat~. the draifl~'~ ~rea, in ,square miles.
<br />',r..I'" . ,~.\ //"',._...:.'.-.,-',., :. .,' "\.. ,._,"\1.';"/ .. ....- ,-
<br />4. De'e:~rtni~~:- the C~~lk-'~~s~~~i9<iO:r:\~,~~:'io~f SU;:-:',_.l'qo-,~ _a,nd~~:::,~':j,:\'_1~:
<br />506.::xe~r/ flooa,s"from,th~,r~9:j,On,a~llydfOlogy, curves .:"" , :\,v/i", i! d "
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<br />5. Plot ,the, water-:"s.urfaceTEI!:eva-t'i'On--',fu.r-:t.he '1..oG':'year,_:f1ood'o'n~;':"I:\ .1';
<br />'~t~e'cgraPh';Of'-:,eac~/ct:os~,::l~tFqrh'i;' , ~";- .'. ~-~'; ;)..;'.["'T.
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<br />6 . Plot the water._ surface.ja,levatl.c,)Iis for..the,:lOQ-year flood.: ,e,' " ''-,
<br />at 'each, cr..oss section .Of!. tlle> graph ','of,' the '. stream channel' ))";C, \' :
<br />prof'le. "',' './.... .. .... '. ,." -,.,',
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<br />7. Draw the water: surfac.e profile' by connectiD3:-'the,flood ('/:/'''/,5.~'
<br />elevations,lit e~ch cross see;t.ion,wi:tha straight :tine;, ':~:~;Fj.( ,;<
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<br />B. Make a "Pl~ttingtable"'~hO~ing~he, ch{~ne;lstat;io~~;;Pf;:~j:{C{ (\
<br />the flood . elevations that ,correspond, tQ~ the, map contours ,)-,;Y./ '.'
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<br />9. Mark thel?cation 'of 't~e' fio~'~ont~ur,s_ in theltla'.iI1" i,).,::/;,;,:,: : i':
<br />ch~nnel fOf,the -en_tire :st-udy reach., " --, "., ~.'/~ --
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<br />10'; Extend-the','flood 'contours as 'wiggly .lines 'perpendi.dilU:I'// /'
<br />to the direction of flow until they'meet the . .
<br />,- co;t'res~nding;~gr:9un~',cimtour'..' .. . .
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<br />- 11 ._Connect_the" endpofn't's."of. :tl\e '.floOC1' contours ,c. lOQK1-ng "out) /r "J'.
<br />for islands' and' ari" even-spaC::iOlf 611" flood-contours ~':., Flood.'". :,';
<br />boundaries should cross groUnd contours ~n a' tangent," . :C;:,/
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<br />12. Open the flood boundary to indicate potential unmapped
<br />hazards where minor tributaries enter the floodplain.
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<br />It should take you from about 45 minut.es to 1 1/2 hours to
<br />complete this exercise depending' on: your previous experience.. ",'
<br />The deadline is 4:15 p.m.. Thursday, September '22, 19B3~ At that
<br />time, the solution to the problem,will be'reviewed in detail and
<br />the location of flood boUlldarieswill be 'demonstrated in the field"
<br />to the extent possible. You 'are encouraged to.. ask questions at
<br />any time and to discuss' the, exerc'ise wi.th other workshop
<br />participants. Good Luckl_.", "'-
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