WSPC06742

• File Number: 8283.100
• Description: Colorado River Basin-Colorado River Computer Models-Colorado River Simulation System Reclamation
• State: CO
• Water Division: 5
• Date: 9/10/1985
• Title: CR Colorado River Simulation System CRSS-Corres Reports etc-1984-1985-Ranking of the 75 Largest 602A Required Storage Values
• Water Supply Pro - Doc Type: Data

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>I< RANKING OF THE 75 LARGEST 602(A) REQUIRED STORAGE VALUES *'

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CASE 1: 5,8 DEPLETIONS. 6,12% DEPLETION SHORTAGE, SEDIMENT LOAD, NO BANK STORAGE, POWER POOL NOT CONSIDERED

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INFLOW: THE AVERAGE NATURAL RUNOFF AT LEES FERRY, FOR THE SPECIFIC PERIOD (SEE TABLE)
DEPLETIONS: EITHER 5.8 MAF OR THE USSR PROJECTED DEPLETIONS AVERAGED FROM 1985 TO THE END OF THE SPECIFIC PERIOD (SEE TABLE)
ALLOWABLE DEPLETION SHORTAGE = 6.12 PERCENT MINIMUM ANNUAL RELEASE FROM LAKE POWELL = 8.23 MAF
INITIAL SEDIMENT ACCUMULATION (1985) = 1.342 MAF BANK STORAGE COEFFICIENT .00
ANNUAL SEDIMENT LOAD = 61000.0 ACRE-FEET A MINIMUM POWER POOL OF .000 MAF IS MAINTAINED IN THE UPPER BASIN RESERVOIRS

REQUIRED STORAGE = (AVERAGE DEPLETION - AVERAGE INFLOW + MINIMUM RELEASE + ANNUAL SEDIMENT LOAD) X LENGTH OF PERIOD
+ INITIAL SEDIMENT ACCUMULATION + VOLUME NEEDED TO MAINTAIN MINIMUM POWER POOL
REQUIRED STORAGE IS COMPUTED FOR ALL HISTORICAL SEQUENTIAL RUNOFF PERIODS OF ALL LENGTHS (1906-1983 HYDROLOGIC RECORD)
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LENGTH OF AVERAGE AVERAGE REQUIRED PROBABILITY
PERIOD BEGINNING INFLOW DEPLETION STORAGE (PLOTTING
RANKING (YEARS) OF PERIOD (MAF) (MAF) (MAF) POS IT I ON)
- ------ --------- ---- -- - -- ------- --------- -------- - - - -- -- ----
1 25 1953 12,97 5.80 20.46 99.97
2 12 1953 12.18 5,80 19.96 99.94
3 26 1953 13.04 5.80 19.55 99.90
4 29 1953 13.12 5,80 19.16 99.87
5 16 1953 12.63 5.80 19.10 99,84
6 15 1953 12.57 5.80 18.87 99.B1
7 17 1953 12.76 5,80 17.98 99.77
8 24 1954 13,04 5,SO 17.93 99.74
9 11 1954 12.27 5.80 17.43 99.71
10 11 1953 12,31 5,80 17,02 99.68
11 25 1954 13.11 5.80 17.02 99.64
12 14 1953 12,62 5.80 16.94 99.61
13 30 1953 13.22 5.80 16,79 99.58
14 28 1954 13,19 5,80 16.63 99.55
15 9 1953 12.04 5.80 16.58 99.51
16 15 1954 12.72 5.80 16.57 99.48 .
17 18 1953 12.90 5.80 16.38 99.45
18 14 1954 12.66 5.80 16.34 99.42
19 20 1953 12.99 5.80 16.34 99.38
20 27 1953 13.19 5.80 15.99 99.35
21 19 1959 12.97 5.80 15.98 99.32
22 6 1959 11,38 5.80 15.47 99.29
23 16 1954 12.85 5.80 15.45 99.25
24 4 1953 10,22 5.80 15.41 99.22
25 20 1959 13.05 5.80 15.07 99.19
26 28 1950 13.25 5,80 14.97 99,16
27 19 1953 13.02 5.80 14.90 99.12
28 13 1953 12.70 5,80 14.83 99.09
29 23 1959 13.16 5.80 14.68 99.06
30 10 1959 12.41 5.80 14.61 99.03
31 27 1951 13.25 5.80 14.55 98.99
32 10 1954 12.42 5,80 14.49 98.96
33 15 1950 12.86 5.80 14.46 98.93
34 13 1954 12.73 5,80 14.41 98.90
35 9 1959 12.29 5.80 14.39 98.86
36 29 1954 13.29 5.80 14.26 98.83
37 29 1950 13,30 5,80 14.06 98,80
38 8 1954 12.15 5.80 14,05 98.77
39 14 1951 12.83 5.80 14,04 98.73
40 17 1954 13.00 5.80 13.84 98.70