Depth-Duration Frequency of Precipitation for Texas
In cooperation with the Texas Department of Transportation
Depth-Duration Frequency of Precipitation for Texas
Water-Resources Investigations Report 98?4044
U.S. Department of the Interior U.S. Geological Survey
Depth-Duration Frequency of Precipitation for Texas
By William H. Asquith U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 98?4044
In cooperation with the Texas Department of Transportation
Austin, Texas 1998
U.S. DEPARTMENT OF THE INTERIOR Bruce Babbitt, Secretary
U.S. GEOLOGICAL SURVEY Thomas J. Casadevall, Acting Director
Second printing
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. For additional information write to District Chief U.S. Geological Survey 8011 Cameron Rd. Austin, TX 78754?3898 Copies of this report can be purchased from U.S. Geological Survey Branch of Information Services Box 25286 Denver, CO 80225?0286
ii
CONTENTS
Abstract ............................................................................................................................................................................... 1 Introduction ......................................................................................................................................................................... 1
Purpose and Scope ................................................................................................................................................... 1 Previous Studies ....................................................................................................................................................... 2 Climate of Texas ...................................................................................................................................................... 2 Data Base of Precipitation Annual Maxima ............................................................................................................ 3
Data Sources ................................................................................................................................................ 3 Correction of Precipitation Annual Maxima for Fixed-Interval Recording ................................................. 6 Acknowledgments ................................................................................................................................................... 11 Regionalization of Precipitation Annual Maxima ............................................................................................................... 11 L-moments ............................................................................................................................................................... 12 Generalized Logistic and Generalized Extreme-Value Distributions ...................................................................... 16 Spatial Averaging of L-coefficient of Variation and L-skew and Estimation of L-scale ......................................... 17 Contouring Distribution Parameters ........................................................................................................................ 21 Depth-Duration Frequency of Precipitation for Texas ........................................................................................................ 21 Examples of Depth-Duration Frequency Computation ........................................................................................... 23 Precipitation Intensity-Duration Frequency Curve .................................................................................................. 24 Comparison to Previous Studies .............................................................................................................................. 25 Summary ............................................................................................................................................................................. 25 Selected References ............................................................................................................................................................ 26 Appendix 1. Fifteen-Minute Precipitation Stations in Texas With at Least 10 Years of Annual Maxima Data Through 1994 ........................................................................................................................................ 72 2. Hourly Precipitation Stations in Texas With at Least 10 Years of Annual Maxima Data Through 1994 ................................................................................................................................................. 75 3. Daily Precipitation Stations in Texas With at Least 10 Years of Annual Maxima Data Through 1994 ................................................................................................................................................. 83
PLATE
(Plate is in pocket)
1. Map showing locations of 15-minute, hourly, and daily recording precipitation stations in Texas with at least 10 years of annual maxima data through 1994
FIGURES
1. Graph showing relation between precipitation depth and storm duration for world record, Texas record, and Texas data-base maxima ............................................................................................................................... 4
2. Map showing modified National Weather Service climatic regions of Texas ..................................................... 5 3. Boxplots showing record-length distribution for 15-minute, hourly, and daily precipitation stations in
climatic regions of Texas ..................................................................................................................................... 7 4?7. Graphs showing:
4. Time series of 1-day precipitation annual maxima for long-term stations (1778, 2266, and 2444) and distribution of available record in corresponding climatic regions of Texas ..................................... 8
5. Time series of 1-day precipitation annual maxima for long-term stations (3262, 3873, and 3992) and distribution of available record in corresponding climatic regions of Texas ..................................... 9
6. Time series of 1-day precipitation annual maxima for long-term stations (4058, 5272, and 9522) and distribution of available record in corresponding climatic regions of Texas ..................................... 10
7. L-moment ratio diagrams for selected precipitation durations in Texas .................................................. 14 8?9. Boxplots showing:
8. Effects of spatial averaging on the statewide distribution of L-coefficient of variation for each precipitation duration ................................................................................................................................ 19
9. Effects of spatial averaging on the statewide distribution of L-skew for each precipitation duration ..................................................................................................................................................... 20
CONTENTS iii
10?18. Maps showing location () parameter of generalized logistic (GLO) distribution for: 10. 15-minute precipitation duration in Texas ................................................................................................ 28 11. 30-minute precipitation duration in Texas ................................................................................................ 29 12. 60-minute precipitation duration in Texas ................................................................................................ 30 13. 1-hour precipitation duration in Texas ...................................................................................................... 31 14. 2-hour precipitation duration in Texas ...................................................................................................... 32 15. 3-hour precipitation duration in Texas ...................................................................................................... 33 16. 6-hour precipitation duration in Texas ...................................................................................................... 34 17. 12-hour precipitation duration in Texas .................................................................................................... 35 18. 24-hour precipitation duration in Texas .................................................................................................... 36
19?23. Maps showing location () parameter of generalized extreme-value (GEV) distribution for: 19. 1-day precipitation duration in Texas ........................................................................................................ 37 20. 2-day precipitation duration in Texas ........................................................................................................ 38 21. 3-day precipitation duration in Texas ........................................................................................................ 39 22. 5-day precipitation duration in Texas ........................................................................................................ 40 23. 7-day precipitation duration in Texas ........................................................................................................ 41
24?32. Maps showing scale () parameter of generalized logistic (GLO) distribution for: 24. 15-minute precipitation duration in Texas ................................................................................................ 42 25. 30-minute precipitation duration in Texas ................................................................................................ 43 26. 60-minute precipitation duration in Texas ................................................................................................ 44 27. 1-hour precipitation duration in Texas ...................................................................................................... 45 28. 2-hour precipitation duration in Texas ...................................................................................................... 46 29. 3-hour precipitation duration in Texas ...................................................................................................... 47 30. 6-hour precipitation duration in Texas ...................................................................................................... 48 31. 12-hour precipitation duration in Texas .................................................................................................... 49 32. 24-hour precipitation duration in Texas .................................................................................................... 50
33?37. Maps showing scale () parameter of generalized extreme-value (GEV) distribution for: 33. 1-day precipitation duration in Texas ........................................................................................................ 51 34. 2-day precipitation duration in Texas ........................................................................................................ 52 35. 3-day precipitation duration in Texas ........................................................................................................ 53 36. 5-day precipitation duration in Texas ........................................................................................................ 54 37. 7-day precipitation duration in Texas ........................................................................................................ 55
38?46. Maps showing shape () parameter of generalized logistic (GLO) distribution for: 38. 15-minute precipitation duration in Texas ................................................................................................ 56 39. 30-minute precipitation duration in Texas ................................................................................................ 57 40. 60-minute precipitation duration in Texas ................................................................................................ 58 41. 1-hour precipitation duration in Texas ...................................................................................................... 59 42. 2-hour precipitation duration in Texas ...................................................................................................... 60 43. 3-hour precipitation duration in Texas ...................................................................................................... 61 44. 6-hour precipitation duration in Texas ...................................................................................................... 62 45. 12-hour precipitation duration in Texas .................................................................................................... 63 46. 24-hour precipitation duration in Texas .................................................................................................... 64
47. Graph showing precipitation intensity-duration curves of 100-year storm for selected localities in Texas ........ 65 48. Map showing depth of 100-year storm for 6-hour precipitation duration in Texas ............................................. 66 49. Graph showing precipitation intensity-duration curves of 100-year storm for Amarillo and Orange,
Texas .................................................................................................................................................................... 67
TABLES
1. Correction factors for mean annual maxima of precipitation .............................................................................. 11 2. Summary of goodness-of-fit and heterogeneity measures for Texas ................................................................... 15 3. Summary statistics of distribution-parameter maps for each precipitation duration in Texas ............................. 22
iv
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- depth duration frequency of precipitation for texas
- texas population projections 2010 to 2050
- p˜no texas motor frisco speedway dallas fort worth
- north texas to 2030 extending the trends
- a reference guide to arlington county landscape
- texas metropolitan statistical areas msa counties
- urbanized area outline map census 2000 dallas fort
- texas general soil map with descriptions
- fema floodplain rush creek watershed arlington texas
- texas core based statistical areas cbsas and counties
Related searches
- nys frequency of payment law
- what is the frequency of a wave
- frequency of a sin function
- how to calculate frequency of waves
- calculating frequency of light
- frequency of a sine wave
- frequency of sin graph
- frequency of radiation calculator
- frequency of light wavelength calculator
- finding frequency of light from wavelength
- how to find frequency of a wave
- frequency of a photon to its wavelength