|
<br />-_0:
<br />
<br />FLOODPLAIN MAPPING EXERCISE
<br />
<br />fer the
<br />
<br />FLOODPLAIN MANAGEMENT WORKSHOP
<br />Beaver Creek, Celerade
<br />
<br />September 21, 1983
<br />
<br />Purpese
<br />
<br />The purpese .of this exercise is te give workshep
<br />participants practical experience in the precess .of identifying
<br />fleedplain boundaries.
<br />
<br />Objectives
<br />. Te delineate a majer drainage basin .on a map.
<br />
<br />. Te interpret fleed hydrelogy from existing engineering
<br />data.
<br />
<br />. Te delineate fleed beundaries vertically in prefile and
<br />cress secti.on and herizentally .on a map.
<br />
<br />. Te see What the fleedplain infermatien actually leeks
<br />like en the greund.
<br />
<br />Situatien
<br />
<br />Let's assume you are .one .of the fellewing individuals:
<br />
<br />. an invester interested in developing a specific site
<br />fer a majer mountain resert,
<br />
<br />.>,
<br />.. .
<br />
<br />the ,cens\.llting<eng.,i.1'1.e_et: hired by the developer te
<br />iderit'ify, .the. fleJ::idptain:, ,,:- ,~. .
<br />_ _~~ _._.... : :,_ --'. _j :.'':: _:-~ _ ~-~.. :>:;-:.'/.+';':' .:':;.3. . .
<br />
<br />. . the '1ec-al ,1al1d-':use_admn'i:stratorresponsible fer
<br />,review_ing'tti-e engine,ei's;Wi:irk' and' ultimately issuing a
<br />buii'di'ng p'ermi-e.' . - '" : - -,
<br />
<br />.: ~~. .
<br />
<br />. "".
<br />
<br />"
<br />. ~As ene.of the,abeve, yeu are cencerned that apprepriate
<br />c.onsider.a;t,ieribe gi:.ven:t~~'fleodplainissues early en during the
<br />p.lanning' stage' 5.0' th'at- "future flood " damages will be minimized.
<br />You nClve there'fere-decided.'to"detetmine-fleed elevatiens and
<br />beundarfes "fer "the- ;elCiS:t-fng<::l(}O~yea:r floed.
<br />
<br />-..::- :-~ . - ,- \ '-r r;
<br />Back~reund ". ,c c
<br />
<br />. '" ~ ''''
<br />
<br />.';'"- .-. '.
<br />
<br />.;;. .:;-rJ ;;- ,': -:. ~
<br />
<br />~. .~... ,- ~ '. ,
<br />.. . - ~ .' -
<br />, .:: '-The prepesed resdrt;"ls" on Beaver .Creek in Eagle Ceunty. The
<br />study reach ext.ends' for-'f,\,60e:feeE 'upstream from a point
<br />appreximately 1.6 miles'abevethe cenfluence .of Beaver Creek with
<br />the Eagle River at Aven, Celerade.
<br />
<br />~1' '. '.;' .!=; ;.;_ ,"':;
<br />
<br />Beaver Creek fellows a steep ceurse aleng a sharply narrON
<br />valley fleer with";irregular side"slepes.;,The bettem .of the
<br />channel is uneven wiEh'exposed cebbles:and'a few beulders. The
<br />CreeK~s .overbank areas are lined with Evergreen and Aspen
<br />trees.." lOgs, and dense patches .of bushes.
<br />
<br />::'~': ..' the7-Be~ve:r"s:reek drai'hage:bil'5.'in ranges in elevatien from
<br />ab'out ,8,OOO'feet'at'the;prepesed'site te abeut 12,200 feet near
<br />'the head'ia'tkts. ," Di'v~:r:s ien .of sl:ream>f1ew abeve the study reach
<br />for' rrrii:la~ibn purposes 'dees'. not -substantially affect peak
<br />flews:.' . --' d --:-,;:,' '..-
<br />
<br />.~ . ~. . '
<br />Thr~~ s~ail,'naturai lakes .on the main stem (Beaver Lake,
<br />. ,,,'_' _ 'o.' \ __'';: ~l'T."" -, ,-- :
<br />Lewer. Turitue,is~e~ !.oake;, "il!l.d: U'I,\,er Turq:ueis e Lake) previde .only
<br />miner reg'ulat:i6'n; efstre-a'infl6\.is~:H .peak. discharges fer streams
<br />at such higb_altitupes.a~_~he Beaver Creek basin appear te be
<br />infl~nced-pr1ftiar.,ily'. pY:>~meii:.-irt~ snow. .
<br />~,'. . 'J C ~ _. 6 lJ.';' ': G . ,_ :.:!:.. ---.-::..::; c ~-. (
<br />
<br />
<br />;;-!~'_:. "-':;"'':-:-:: ::"b::::)"'-.~\
<br />
<br />705
<br />BS/FPMW
<br />
<br />
<br />Q
<br />
<br />~__'OO :,.t..:.\.~~'1;':'1. J '-", .o....~
<br />.-' _::. ',~ :,;: <::1~ ~.... ;:'.:....:.(3; c::. '," :;~": r:;
<br />
<br />- .. ~ ."
<br />',:. -:::
<br />
<br />.;:;~ -:;:,:;';';'>::.
<br />
<br />,
<br />. \.: -.
<br />
<br />,'-,.
<br />
<br />~-:'-.!" o~
<br />
<br />'":";6
<br />
<br />';-.) r ~('
<br />
<br />;x
<br />
|