FLOOD00005

• County: Statewide
• Title: Precipitation Records and Flood-Producing Storms in Cheyenne Wyoming
• Date: 10/23/2003
• Prepared For: Cheyenne
• Floodplain - Doc Type: Educational/Technical/Reference Information

0.8
<J) 0.7 5.0
w
J:
'-' 6.6 4.0
~
~ 0.5 <J)
Z 3.0 w
J:
0 '-'
;:: 0.4 ~
"" ~
f-- 2.0
a:: 0.3 ~
<3
w 0.2 ;::
0: 1.5 "
0- f--
:! 0.1 a::
:> <3
:! w
X 0 1.0 0:
"" PRECIPIT A TION-FR EOUENCY 0.9 0-
::; CURVE USING ALL DATA 0.8 ::;
..J -0.1 .' :>
" ,.' A V AILA8LE THROUGH 1986 -0.7 :!
:> ..' X
z -0.2 0.6 "
z .' . 95 PERCENT CONFIDENCE LIMIT ::;
" .
-0.3 . 0.5 ' ..J
~ .' .1985 ANNUAL MAXIMUM PRECIPITATION ""
..' :>
::; VALUE AND YEAR--Year only 0.4 z
-0.4 z'
J: shown for largest storms; only "
f--
a; -0.5 selected data points shown for 0.3
"
8 recurrence intervals leu than
..J -0.6 5 years to Increase readability
-0.7 0.2
1.01 1.5 2 3 45 1015 30 50 100, 200 500 1.000 5.000 10.000
AVERAGE RECURRENCE INTERVAL. IN YEARS
0.8
<J) 0.7 5.0
w
J:
'-' 0.6 4.0
~
~ <J)
0.5 w
~ 3.0 :t:
'-'
;:: 0.4 ~
" ~
f-- 2.0
;;: 0.3 Z
<3 0
w 0.2 ;::
0: 1.5 "
0- f--
::; 0.1 PRECIPIT A TION-FREOUENCY a::
:> CURVE: <3
::; w
x 0 Using all data available 1.0 0:
" 0.9 0-
::; through 1986 0.8 ::;
..J ::l
" Using only data ayailable 0.7 :!
:> through 1984 0.6 x
z -0.2 "
z ::;
" AREA INCLUDED 8ETWEEN 95
"- -0.3 0.5 ..J
0 PERCENT CONFIDENCE LIMITS: "
:>
::; -0.4 ~ Using all data avaHable 0.4 z
J: Z
'f-- through 1986 "
a;
" -0.5 ::::;.:..,,% Using only da ta available 0.3
'"
0 .. through 1984
..J -0.6 -'-
-0.7 0.2
1.01 1.1 1.5 2 3 45 1015 30 50 100 200 500 1.000 5.000 10.000
AVERAGE RECURRENCE INTERVAL. IN YEARS

Figure 3 1. --Precipita tion-frequency curves for 2-hour duration,
logarithmic Gumbel distribution.

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