2-08CW056 Supplemental Data

• Case Number: 08CW0056
• Stream Name: Severy Creek
• Watershed: Fountain
• Water Division: 2
• Water District: 10
• County: El Paso
• County: Teller
• Instream Flow App - Doc Type: Supplemental Data

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Table 4. Summary statistics of estimated mean daily discharge through Severy Creek based on flow
records from North Cascade Creek. For each month, the discharge that 50% of flows were equal to or
greater than is highlighted. Yellow indicates summer months and blue indicates winter months.
Station: Estimate for Severy Creek based on Cascade Ck North ID: 1116
Parameter: Discharge Statistic: Mean Daily Discharge
Year: 10/1/49 - 9/30/2006 Latitude: 38:53.821
State: Colorado Longitude: 104:59.580
County: 0 Elevation: -8483 ft
Drainage Area: 3.39 mil
Monthly Statistics
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Annual
# days
1767
1610
1766
1709
1758
1699
1767
1720
1688
1754
1705
1753
20696
Avg Day
1.28
1.23
1.39
2.04
4.09
3.63
2.24
2.04
1.71
1.67
1.55
1.40
2.02
Max Day
4
3
4
16
40
40
23
13
7
6
8
4
40
Min Day
0.13
0.14
0.31
0.22
0.27
0.27
0.17
0.27
0.33
0.33
0.27
0.22
0.13
# months
57
57
57
57
57
57
57
55
56
57
57
57
55
Sdev Month
0.65
0.56
0.54
0.90
3.70
3.81
1.83
1.26
0.95
0.82
0.87
0.71
Skew Month
1.12
0.63
0.66
1.14
1.87
2.94
3.09
1.69
1.10
1.08
2.29
1.16
Min Month
0.26
0.17
0.39
0.48
0.58
0.46
0.34
0.37
0.38
0.35
0.33
0.33
Max Month
3.55
3.03
2.86
5.02
15.90
22.04
11.52
7.07
4.69
4.57
5.77
3.98
Percentiles'
1%
3.98
3.06
2.81
6.18
19.46
22.96
11.04
7.54
4.67
4.40
4.38
3.98
11.64
5%
2.34
2.23
2.43
4.39
14.19
11.64
5.27
4.83
3.57
3.30
3.06
2.81
4.68
10%
2.12
1.91
2.12
3.78
8.95
7.88
4.11
3.94
3.25
2.81
2.57
2.34
3.31
20%
1.70
1.61
1.80
2.57
5.43
4.11
2.94
2.69
2.35
2.23
2.12
1.90
2.47
50%
a
,`" •. !
2;26i
1.70
2.57
2.35
1.70
1.70 3R
;. � n�'Mt%'
1.51
80%
0.72
0.72
0.87
1.13
1.70
1.50
1.13
1.04
0.87
0.96
0.87
0.80
0.96
90%
0.45
0.51
0.65
0.96
1.38
1.13
0.80
0.72
0.72
0.80
0.65
0.58
0.72
95%
0.39
0.39
0.50
0.72
0.87
0.80
0.60
0.63
0.58
0.58
0.51
0.45
0.51
99%
0.27
0.17
0.39
0.39
0.39
0.39
0.39
0.34
0.39
0.33
0.33
0.33
0.33
Table 5. Summary statistics of estimated mean daily discharge through Severy Creek based on flow records
from South Cascade Creek. For each month, the discharge that 50% of flows were equal to or greater than
is highlighted. Yellow indicates summer months and blue indicates winter months.
Station: Estimate for Severy Creek based on Cascade Ck South ID: 1117
Parameter: Discharge Statistic: Mean Daily Discharge
Year: 10/1/49 - 9/30/2006 Latitude: 38:53.821
State: Colorado Longitude: 104:59.580
County: El Paso Elevation: -8483 ft
Drainage Area: 3.39 mil
Monthly Statistics
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Annual
# days
1755
1610
1756
1688
1730
1677
1756
1705
1681
1766
1708
1749
20581
Avg Day
2.26
2.13
2.20
2.91
6.47
6.91
4.37
4.35
3.51
3.00
2.72
2.44
3.61
Max Day
6
5
5
14
36
43
43
21
9
10
7
6
43
Min Day
0.62
0.42
0.47
0.86
1.26
0.85
1.11
1.11
0.09
0.00
0.93
0.86
0.00
# months
57
57
57
56
56
56
57
55
56
57
57
56
55
Sdev Month
0.93
0.79
0.69
0.92
4.57
5.00
2.93
2.12
1.31
0.99
0.91
0.91
Skew Month
1.07
0.83
0.99
1.23
1.71
1.91
2.84
1.62
0.61
1.16
1.45
1.21
Min Month
0.86
0.65
0.92
1.33
1.90
1.50
1.35
1.41
1.35
1.10
1.09
1.10
Max Month
5.35
4.64
4.43
6.10
22.26
23.93
18.03
13.44
6.91
7.12
6.55
5.78
Percentiles'
1%
5.78
4.67
4.38
6.95
26.43
26.95
20.94
12.60
7.66
6.95
6.08
5.78
18.85
5%
4.37
3.53
3.53
5.61
18.13
19.32
9.53
8.76
6.27
4.38
4.38
4.37
8.39
10%
3.26
2.99
2.99
4.38
13.25
13.69
6.95
7.30
5.29
4.09
3.71
3.52
6.20
20%
2.99
2.74
2.74
3.53
8.96
9.09
5.30
5.94
4.52
3.69
3.52
2.99
4.37
50%
a
,`" •. !
2;26i
2.50
4.68
5.28
3.52
3.66
2.74
80%
1.49
1.40
1.60
2.02
2.73
3.39
2.38
2.50
2.26
2.26
1.91
1.60
1.94
90%
1.20
1.20
1.20
1.80
2.26
2.26
2.02
2.04
1.80
1.91
1.60
1.29
1.60
95%
1.02
1.02
1.20
1.60
1.91
1.80
1.70
1.72
1.49
1.49
1.49
1.20
1.20
99%
0.86
0.69
0.86
1.20
1.70
1.29
1.20
1.40
1.20
1.11
1.11
1.02
1.02
Percentiles estimate the value (discharge) in the record associated with a given percentile. They provide an estimate
of the percentage of days on which a given flow is exceeded. Percentiles were calculated using the PERCENTILE
function in MicroSoft Excel.