Summary Report ‎(Working Draft)‎ Modeling of Reservoir Management Strategies for Lakes Powell and Mead December 2005

• Description: Summary Report ‎(Working Draft)‎ Modeling of Reservoir Management Strategies for Lakes Powell and Mead December 2005
• State: CO
• Title: Summary Report ‎(Working Draft)‎ Modeling of Reservoir Management Strategies for Lakes Powell and Mead December 2005
• Water Supply Pro - Doc Type: Meeting

Modeling Results for
Colorado River Basin States' Modeling of
Colorado River and Reservoir Management Strategies
As shown in Figure 4 -5, Powell is slightly higher at the 10th percentile under the
three Step Shortage revisions in which the trigger elevation for the first shortage
is 1100 ft (revl, rev2 and rev3). This result indicates that under the Hybrid
Original strategy, Powell is sensitive to when a shortage is started. The difference
between revl, rev2 and rev3 is minor. This indicates that Powell is less sensitive
to the pattern of the shortage amounts.
1,140
1,120
1,100
m
-=4'. 1,080
C
0
W 1,060
a
m
m
1,040
Y
R
J
1,020
1,000
980
2005
Figure 4 -6
Lake Mead 10th Percentile Elevations
-0-Normal - Step Short Original
-+4 -Step Short Original
- {Step Short revl
--9--Step Short rev2
-- -Step Short rev3
2010 2015 2020 2025
Calendar Year
Figure 4 -6 shows that at the 10th percentile, an average of about 5 ft is gained by
starting a shortage at 1100 ft versus 1075 ft. Between the revisions that start a
shortage at 1100 ft, the difference is even less noticeable, with an average
difference of about 2 ft.
23