FLOOD08329

• County: Statewide
• Community: State of Colorado
• Basin: Statewide
• Title: Probable Maximum Precipitation Estimates, United States Between the Continental Divide and the 103rd Meridian
• Date: 6/1/1988
• Prepared By: COE
• Floodplain - Doc Type: Educational/Technical/Reference Information

3.2.4
3.3

4.
4.1
4.2
4.3
4.4
4.5

5.
5.1
5.2
5.3
5.4

6.
6.1
6.2
6.3
6.4
6.5
6.6

7.
7.1
7.2
7.3
7.3.1
7.3.1.1
7.3.1.2
7.3.1.3
7.3.1.4
7.3.1.5
7.4
7.4.1
7.4.1.1
7.4.1.2
7.4.1.3
7.4.1.4
7.4.1.5
7.4.1.6
7.5
7.6

8.
8.1
8.2
8.2.1
8.2.2

8.2.2.1

Sheltered orographic subdivisions......................
Barrier/effective elevation map..........................

Maximum persi8tin~ 12-hr IOOQ-mb dew points................
Background. .. . . . . . . . . .. . . . . . . . . . . . . . . . .. . .. . . . . .. . . . . . . . .
Data collection..........................................
Analysis................................................ .
Other studies............................................

Revised seasonal maps....................................

Representative persisting 12-hr 1000-mb storm dew points...
Introduction............................................ .

Criteria for selecting representative storm dew points...
Selection of representative storm dew points.............
Storm moisture maximization factors......................

Approaches. . . . . . .. . . . . . . . . . . . . . . . . . .. . . . . . . . . .. . . . . . . . . . . . .
Introduction. ... . .. ... ... .... .. .... ...... ... ...... ... . ...
Orographic models........................................
Traditional approach.....................................
Storm separation method..................................
Depth-area relations.....................................
Local-storm PMP..........................................

Storm separation method....................................
Introduction............................................ .
Glossary of terms........................................
Background.............................................. .
Basic concepts.........................................
Overall method.......................................
Module 1.............................................
Module 2.............................................
Module 3.............................................
Module 4.............................................
Methodololity. . . . . . .. . . . . . . . .. . . . . . . . . . . . . . . . . . .. . . . . . . . . . .
Module" flowcharts......................................
Module 0 procedure...................................
Module 1 procedure...................................
Module 2 procedure...................................
Module 3 procedure...................................
Module 4 procedure...................................
Module 5 documentation...............................
Example of application of SSM............................
Application of SSM to this study.........................

Storm transposition........................................
Introduct 10n. . . . . . .. . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . .. . . .
Transposition limits.....................................
Transposition limits by storm type.....................
Final transposition limits of storms for individual
total storm precipitation............................
Gibson Dam, Montana storm - June 6-8, 1964 (75)......

iv

Pa/l:e

67
67

69
69
70
72
75
76

83
83
83
83
88

94
94
94
94
95
95
96

96
96
96
103
105
105
105
106
106
107
107
108
108
110
111
113
118
118
122
122

124
124
124
124

127
127