FLOOD01132

• Designation Number: 361
• County: Weld
• Community: Severance
• Stream Name: The Slough
• Title: Floodplain Information Report - The Slough, Severance, Colorado
• Date: 5/1/1981
• Designation Date: 5/1/1994
• Floodplain - Doc Type: Floodplain Report/Masterplan

DRAINAGE: BASIN

i\part of the surf"ce of tr.1l "ilrth thilt isocclJpied by a drairla'Je

Sy.'ltlOffi '"hich consists of

surfdc"

stream,

its tributiuies, arld

,

impounded surface ."iJters and lakes.

EOLIAN

A term 2lpplied to deposits arranged by

",

wind,

such

"

",

sands and other loose materials along shores.

FLOOD

An overflow on lands not rlormally covered by water and that are

used or usable by man.

FloodS have two essential characteristics; the

irlundationof land is temporary; and

",

land

is adjacent

"

ood

inundated

by overflow

from

a river or stream or an ocean, lake, or

other body of stilmlin'l waton.

Normally a flood is considered

as any

temporary

rise in str"ilm[1uw or stilge, but not the ponding of surf,;"e

w~tQr, that results in significa~t adverse effects

, 0

the vi"inity.

Adverse

effects may

include

damay"s

fror;1

overflow of land areas,

t",",PO ~ dry bacb-lat..,~ cffectlJ in IJc....c~" ;1:"1d

lec,,1

dr.:;J.naga ch"nn"ls,

creiltion of

uns;1nitilry conditions or other lmf<lvorJ.ble situations by

deposition of materials in stream channels during

flood

re"..ssions,

u,""

"f ground

water coincid..nt with increased streamflow, and other

problems.

Fl.OOD, Hll-YEAR

A typo of

flood,

including

,",

'..ater

Sur [ace elevation and

t<e"it"ri.'ll

"ccup~ t ion ttll' reof, ...1'. ic,~ can be ex pected to occur ,1t any

t line in a Cj i V.HI ara" hilsed upon recorded hi ~to r icnl pr ec i pi tation and

other

valid data, but with <In average statistical arle percent chance

"

I
II
"

of being equ.'Ill..<'l or ..xceeded during ilny one year. The term

i:; usc.d

interchangeably with a one percent

flood or rntermediate Regional

F'lood.

(S..e<1efinition for tntermediate Regional Flood.)

I
I
,

,LOODCRE:ST

The maximum state or eleViltion reached by the waters of

,

flood

ilt a given location.

Fl.OOD FREQiJE:NCY

(See ProbabilitY.l

The "verage recurrence interval of specific

disch,uges or water stages which COluse flooding.

FLOOD PEAK

The maximum

instantaneous dischan.le of

flood

at a given

,

location.

It usuOllly occurs at or near the time of the flood crest.

FLOODPLAIN

'h,

in and

adjacent to

are"

a stream,

whiCh Is subject to

fl<'l<'lo1ic,<; a" th~ r'""..,lt .,! th" ':l<",ur~enc(! ':l: ;l l~'t-l'c'::~ ~lood 011.0 which

is thus So ad\lers.. to past, current, or

foreseeOlble construction or

land

use

as to constitute a significant haZily(l tn puhlic health and

sOlfetyor to property.

FL00~ PRC'f E.~

^ grilph showing the relationship of water

surface elevation

"

location, the latter generally expressed as distance above mouth for a

stream of water flowin'] in <lit o!l"n "hannel.

It is <)enerally drawn to

show surface elevation for the crest of a specific flood, but may be

pr~par"d for conditions at a given t1me or stage.

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