WSP00624

• File Number: 8220.101.18
• Description: Glen Canyon Dam/Lake Powell
• State: AZ
• Basin: Colorado Mainstem
• Date: 1/1/1976
• Title: Flood Control - Graphs
• Water Supply Pro - Doc Type: Data

.,;!rlK\~f,~jV~~1i;<:~i,;~, :

,.'< ,-. '"

. -: ~" '.

');'(~;:i~~}~{...
..;"",."~.,,.
~____<-. ",,_,.~'If,!{!~\

)'"

":.'\..i":'-{;:~~~l~~~~-~-,,

.. - .",~

-.;.,..-- '."

:;':,~-.'-;~?,;-,:'

-..':'

", ':~:. ',.' -, "<::...y?:;t~k-~~;~i;

99,99
18

99,9 99.8

99 98

95

90

80 70 60 50 40 30 20

2

Q2 0.1 0,05 O.QI

16

I. DEPLETIONS ARE THE TOTAL RIVER BASIN
USE PLUS ANY ADDITIONAL RELEASE
FROM HOOVER DAM,

2. BASED ON THE 1906-197S PERIOD OF RECORD,

- 14
u.
<l
::;:
w 12
...J
m
<l
...J
~ 10
<l
w
~ u
~
<~ 8
w
'"
<l
a:
0
l-- 6
en
...J
~ JANUARY I,FLOOD CONTROL REQUIREMENT
0 5.35 MILLION ACRE -FEET SPACE AVAILABLE
l-- 4
( 3 YEAR PROJECTION) (5)

3, PARKER RELEASE CAPACITY BASED ON
13,5 M A F RELEASE FROM HOOVER DAM.

4. SPACE AVAILABLE IS THAT SPACE ABOVE
HOOVER DAM.

5. PROBABILITIES BASED ON A 3 YEAR PROJECTION
USING THE GEOLOGICAL SURVEY METHOD OF
DETERMINING REOCCURRENCE INTERVALS,

2

15 14 13 12
DEPLETION LEVELS (MAF)
II)

0,01

0.05 0.1 02 0.5

2

5

10

20 30 40 50 60 70 80

90

95

98 99

99.8 99,9

99.99

PROBABILITY OF REACHING FLOOD CONTROL LEVELS
(2)

,

-~- ,

-~,-,-~

~~ ..,..;0...."..._ ".'.

-

<_~ N_'~~"_ ~_ ___.