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

~-------
-~~------ ----~---
0.2
'" 1.5
w 0.1
:I:
u
;; 0 1.0
;; 0.9 '"
w
Z -0.1 0.8 :I:
u
0 b.7 ;;
e: -0.2 ;;
<t 0.6
...
Ii: -0.3 0.5 ~
U
w e:
0: -0.4 0.4 <t
0- ...
::!E Ii:
::> -0.5 U
::!E PR ECIPIT A T10N-FREOUE NCY 0.3 w
X a::
<t CURVE USING ALL DATA 0-
::!E . ::;
..J . AVAILABLE THROUGH 1986 ::>
::!E
<t . . O.~ X
::> 95 PERCENT CONFIDENCE LIMIT
z .' <t
Z . ::;
"
<t '1985 ANNUAL MAXIMUM PRECIPITATIO ..J
l5 VALUE AND YEAR--Year only <t
::>
::!E shown fOT largest storms; only z
:I: Z
... selected data points shown for 0.1 <t
0: recurrence Intervals less than 0.09
<t
8 -1.1 5 years to increase readability 0.08
..J 0.07
-1.2
1.01 1.1 1.5 2 3 45 10 15 30 50 100 200 500 1.000 5.000 10.000
AVERAGE RECURRENCE INTERVAL. IN YEARS
0.2 1.5
'"
w 0.1
:I:
u
;; 0 1.0
;; '"
0.9 w
Z -0.1 O.B :I:
u
0 0.7 ;;
e:
<t -0.2 0.6 ;;
...
Ii: Z
U -0.3 0.5 0
w e:
0: PRE CIPIT A TION -FR EOUENCY 0.4 <t
0- -0.4 ...
::; CURVE: Ii:
::> -0.5 U
::; Using all data available 0.3 w
x a::
through 1988 0-
<t -0.6
::; Using only data available ::;
..J ::>
<t ':'0.7 through 1984 0.2 ::!E
::> x
z AREA INCLUDED BETWEEN 95 <t
z -0.8 ::!E
<t PERCENT CONFIDENCE LIMITS: ..J
.. <t
0 -0.9 ~ Using all data available ::>
::!E z
Z
:I: through 1986 <t
... -1.0 0.1
0: _.- Using only data available
............... 0.09
<t ................
:::;:::;:;:::~: 0.08
8 -1.1 ............... through 1984
.........-
..J 0.07
-1.2
1.01 1.1 1.5 2 3 45 10 15 30 50 100 200 500 1,000 5.000 10.000
AVERAGE RECURRENCE INTERVAL, IN YEARS
Figure 3 a.--Precipitation-frequency curves for 5-minute duration,
logarithmic Gumbel distribution.

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