In cooperation with the Texas Department of Transportation
Atlas of Depth-Duration Frequency of Precipitation Annual Maxima for Texas
By W.H. Asquith and M.C. Roussel
U.S. Geological Survey
Scientific Investigations Report 2004–5041
(TxDOT Implementation Report 5–1301–01–1)
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Contents
Abstract
Introduction
Purpose and Scope
Background
Depth-Duration Frequency of Precipitation Annual Maxima
Alternative Regional Frequency Analysis
Results for South Texas
Results for Western North Texas and Southwestern Oklahoma
Contour Maps of Depth-Duration Frequency of Precipitation Annual Maxima in Texas
Summary
Selected References
Figures
1. |
Graphs showing L-moment ratio diagrams for selected storm durations in Texas | |
2. |
Flowchart showing components of the process to generate a depth-duration frequency of precipitation map for Texas | |
3. |
Map showing National Weather Service hourly precipitation stations in the South Texas, western North Texas, and southwestern Oklahoma regions | |
4–15. |
Maps showing depth of precipitation for 2-year storm for: | |
4. |
15-minute duration in Texas | |
5. |
30-minute duration in Texas | |
6. |
1-hour duration in Texas | |
7. |
2-hour duration in Texas | |
8. |
3-hour duration in Texas | |
9. |
6-hour duration in Texas | |
10. |
12-hour duration in Texas | |
11. |
1-day duration in Texas | |
12. |
2-day duration in Texas | |
13. |
3-day duration in Texas | |
14. |
5-day duration in Texas | |
15. |
7-day duration in Texas | |
16–27. |
Maps showing depth of precipitation for 5-year storm for: | |
16. |
15-minute duration in Texas | |
17. |
30-minute duration in Texas | |
18. |
1-hour duration in Texas | |
19. |
2-hour duration in Texas | |
20. |
3-hour duration in Texas | |
21. |
6-hour duration in Texas | |
22. |
12-hour duration in Texas | |
23. |
1-day duration in Texas | |
24. |
2-day duration in Texas | |
25. |
3-day duration in Texas | |
26. |
5-day duration in Texas | |
27. |
7-day duration in Texas | |
28–39. |
Maps showing depth of precipitation for 10-year storm for: | |
28. |
15-minute duration in Texas | |
29. |
30-minute duration in Texas | |
30. |
1-hour duration in Texas | |
31. |
2-hour duration in Texas | |
32. |
3-hour duration in Texas | |
33. |
6-hour duration in Texas | |
34. |
12-hour duration in Texas | |
35. |
1-day duration in Texas | |
36. |
2-day duration in Texas | |
37. |
3-day duration in Texas | |
38. |
5-day duration in Texas | |
39. |
7-day duration in Texas | |
40–51. |
Maps showing depth of precipitation for 25-year storm for: | |
40. |
15-minute duration in Texas | |
41. |
30-minute duration in Texas | |
42. |
1-hour duration in Texas | |
43. |
2-hour duration in Texas | |
44. |
3-hour duration in Texas | |
45. |
6-hour duration in Texas | |
46. |
12-hour duration in Texas | |
47. |
1-day duration in Texas | |
48. |
2-day duration in Texas | |
49. |
3-day duration in Texas | |
50. |
5-day duration in Texas | |
51. |
7-day duration in Texas | |
52–63. |
Maps showing depth of precipitation for 50-year storm for: | |
52. |
15-minute duration in Texas | |
53. |
30-minute duration in Texas | |
54. |
1-hour duration in Texas | |
55. |
2-hour duration in Texas | |
56. |
3-hour duration in Texas | |
57. |
6-hour duration in Texas | |
58. |
12-hour duration in Texas | |
59. |
1-day duration in Texas | |
60. |
2-day duration in Texas | |
61. |
3-day duration in Texas | |
62. |
5-day duration in Texas | |
63. |
7-day duration in Texas | |
64–75. |
Maps showing depth of precipitation for 100-year storm for: | |
64. |
15-minute duration in Texas | |
65. |
30-minute duration in Texas | |
66. |
1-hour duration in Texas | |
67. |
2-hour duration in Texas | |
68. |
3-hour duration in Texas | |
69. |
6-hour duration in Texas | |
70. |
12-hour duration in Texas | |
71. |
1-day duration in Texas | |
72. |
2-day duration in Texas | |
73. |
3-day duration in Texas | |
74. |
5-day duration in Texas | |
75. |
7-day duration in Texas | |
76–87. |
Maps showing depth of precipitation for 250-year storm for: | |
76. |
15-minute duration in Texas | |
77. |
30-minute duration in Texas | |
78. |
1-hour duration in Texas | |
79. |
2-hour duration in Texas | |
80. |
3-hour duration in Texas | |
81. |
6-hour duration in Texas | |
82. |
12-hour duration in Texas | |
83. |
1-day duration in Texas | |
84. |
2-day duration in Texas | |
85. |
3-day duration in Texas | |
86. |
5-day duration in Texas | |
87. |
7-day duration in Texas | |
88–99. |
Maps showing depth of precipitation for 500-year storm for: | |
88. |
15-minute duration in Texas | |
89. |
30-minute duration in Texas | |
90. |
1-hour duration in Texas | |
91. |
2-hour duration in Texas | |
92. |
3-hour duration in Texas | |
93. |
6-hour duration in Texas | |
94. |
12-hour duration in Texas | |
95. |
1-day duration in Texas | |
96. |
2-day duration in Texas | |
97. |
3-day duration in Texas | |
98. |
5-day duration in Texas | |
99. |
7-day duration in Texas |
Tables
1. |
National Weather Service hourly precipitation stations for South Texas region |
2. |
National Weather Service hourly precipitation stations for western North Texas region |
3. |
National Weather Service hourly precipitation stations for southwestern Oklahoma region |
4. |
Regional values for L-moments of 6-, 12-, and 24-hour precipitation annual maxima and corresponding parameters for selected distributions in South Texas region |
5. |
Regional values for L-moments of 6- and 12-hour precipitation annual maxima and corresponding parameters for selected distributions in western North Texas region |
6. |
Regional values for L-moments of 12-hour precipitation annual maxima and corresponding parameters for the GEV distribution in southwestern Oklahoma region |
7. |
Depth-duration frequency of precipitation annual maxima for South Texas region derived from Asquith (1998) and alternative regional frequency analysis |
8. |
Depth-duration frequency of precipitation annual maxima for western North Texas region derived from Asquith (1998) and alternative regional frequency analysis |
9. |
Depth-duration frequency of precipitation for the 12-hour duration in southwestern Oklahoma region |
Abstract
Ninety-six maps depicting the spatial variation of the depth-duration frequency of precipitation annual maxima for Texas are presented. The recurrence intervals represented are 2, 5, 10, 25, 50, 100, 250, and 500 years. The storm durations represented are 15 and 30 minutes; 1, 2, 3, 6, and 12 hours; and 1, 2, 3, 5, and 7 days. The maps were derived using geographically referenced parameter maps of probability distributions used in previously published research by the U.S. Geological Survey to model the magnitude and frequency of precipitation annual maxima for Texas. The maps in this report apply that research and update depth-duration frequency of precipitation maps available in earlier studies done by the National Weather Service.
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