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

0.5 3.0
en
UJ 0.4
:J:
<:.>
~ 0.3 2.0
~ en
w
Z 0.2 :J:
1.5 <:.>'
0 ~
;:: 0.1 ~
..
I- Z
0: 0 1.0 0
C3 0.9 ;::
w ..
c: -0.1 0.8
"- I-
::l; 0.7 0:
::;) -0.2 C3
::l; PRECIPIT A TION-FREQUENCY 0.6 w
X !E
.. -0.3 CURVE USING ALL DA T A 0.5 ~
::l; .' AVAILABLE THROUGH 1986 ::;)
...J .' 0.4 ::l;
.. X
::;) .. 95 PERCENT CONFIDENCE LiMIT
z ..
z . ::l;
.. . 1985 ANNUAL MAXIMUM PRECIPITATl.ON 0.3 ...J
LL .' VALUE AND YEAR--Year only ..
0 ::;)
::l; shown for rargest storms; on'y z
z
:J: selected data paints shown for 0.2 ..
l-
CE recurrence intervals less than
..
8 5 years to increase readability
...J
-0.9 0.126
1.01 1.1 1.5 2 3 45 10 15 30 50 100 200 500 1,000 5,000 I 0,000
AVERAGE RECURRENCE INTERVAL, IN YEARS
0.5 3.0
en
w 0.4
:J:
<:.>
~ 0.3 2.0
~ en
w
~ :J:
0.2 <:.>
;:: 1.5 ~
.. 0.1 ~
I- ~
0: 1.0
C3 0
w 0.9 ;::
c: PRECIPIT A TION-FREQUENCY 0.8 ..
"- -0.1 I-
::l; CURVE: :0.7 a:
::;) C3
::l; -0.2 Using all data available 0.6 w
x c:
through 1986 "-
.. -0.3 0.5
::l; ::l;
Using only data available '::;)
...J ::l;
.~ -0.4 through 1984 0.4 x
z AREA INCLUDED 8ETWEEN 95 ..
z ::l;
.. -0.5 PERCENT CONFIDENCE LIMITS. 0.3 ..l
LL ..
0 -0.6 ~ Using a/l data available ::;)
::l; z
Z
:I: through 19B6 ..
I- -0.7 0.2
CE ~;.~ Using only data available
................
.. :.:.:.;.;.:.;.;.
8 -0.8 .:.;,:.;.:w;, through 1984
...J
-0.9 0.126
1.01 1.1 1.5 2 3 45 10 15 30 50 100 200 500 1,000 5,000 I 0.000
A VERIlGE RE CURRENCE INTERVAL, IN YEARS
Figure 3c. --Precipita tion-frequency curves for 1S-minute duration,
logarithmic Gumbel distribution.

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