FLOOD02442

• County: Rio Grande
• Community: South Fork
• Stream Name: South Fork Rio Grande River
• Basin: Rio Grande
• Title: Flood Hazard Study
• Date: 10/1/1980
• Prepared For: South Fork
• Prepared By: USDA Soil Conservation Service
• Floodplain - Doc Type: Floodplain Report/Masterplan

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,lood Hatard Areas - Refer to Chaffee County Zoning Resolutions, page 26.

Stru~tu[e - ~nythlng constructed or erceted, the use of wnich requires a

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roore of less pc nna nent 10"" tlon on or 1 n ~he ground. I nt ludes hut is

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flood Peak - The highest stage or discharge attained during a flood event;
also referred to as ~ak stage or peak discharge.

not limited to bridges, buildings, canals, dams, ditches, diversions,

irrigation systems, p'''''ps, plpel1nes, rallroads, roads, sewage disposal

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systems, underground conduits, watcr supply systems and wells.

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floodPlain-The relarively flat or low 1a.nd area adjoIning a river,
stream, watercourse, lake, or other body of atanding water which has

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been or may be coveted [""poratHy by flood water. For adminhtrati"e

!ypical Valley Croas Section - An engineering dra~ing of a "ertlcal section
of a atream chantlel and adjoining landscape as v1e~ed In a dOlmstrea..
direction. The drawing represents a specified location ~ithin a
deslgn.atedstreamreach.

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purposes the flood plain cay be defined as the area that would be

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inund3tedbythelOO-yearflood.

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PerchedCh3nnelFlow-A"ondition~ere the flow elevation in the

outer

Water Surface Profile - (This term io synonymous

with Flood Frofile) - a

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portions of the flood plain is higher than tht! flow elevation in the
"",in channel. Thtscondi1:ionoc.curs...henahillheraecondarychannel
recei"es inflow from some location upstream and maintains a flatter

graph showing the relationship of the ..."ter surface elevation of a
flood..venttoloca1:ionalongsstreamorriver.

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slope than the =inchannel.

Watersheda - A drainage has in or area which collects runoff and transmits it

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usually by......ns of stre3ms and tributsries to the ~tlet of the

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Rpsrh - A hvdraul', """""'. ",. ',d.o' ,. 1 , J
, .., .... u~ escr ~e ong tu inal seg=ll!:"

basin.

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of a stream or river.

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Runoff - That part of precipitation, as ...ell aa any other flo~ contribu-
tions, ~hich app~..(" in aurface atre".... of either perennial or
Intormittent fot...

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Stroarn-Anvn3t 1 h 1
_ ura "nnnp ,,~~p,,~..~~l^n t1'~"'.'eh ;''''_~"h ,,~~"'~ nc'^'~ ,,'!\c~!:(:r

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continuously, Inteoo:lttently, or periodi"-ally, including mod1fica~ion
of the natural channel or depression.

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AP-I0

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