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“Storm precipitation analysis in Dallas County”. “GIS in Water Resources ” by Gonzalo E. Espinoza. Introduction. Design Hydrologic systems Drainage Hydraulic Structures Nextrad (NOAA) High Resolution Doppler weather radars. Source of Daily and Hourly data. GIS Data Acquisition

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storm precipitation analysis in dallas county

“Storm precipitation analysis in Dallas County”

“GIS in WaterResources”

by Gonzalo E. Espinoza

introduction
Introduction
  • Design Hydrologic systems
    • Drainage
    • Hydraulic Structures
  • Nextrad (NOAA)
    • High Resolution Doppler weather radars.
    • Source of Daily and Hourly data.
  • GIS
    • Data Acquisition
    • Data Processing
    • Results
data acquisition
Data Acquisition
  • 13 years
    • 1997 - 2009
  • 147 Virtual Stations
  • Daily Data (147)
    • 697,500
  • Hourly Data (5)
    • 569,00
data processing
Data Processing
  • Export table HydroDesktop
  • Add Table ArcGIS
  • Project x,y
  • Time Enabled bar
  • Thiessen Polygons Tool
  • Mean Center
  • Maximum Series
    • Daily
    • Hourly
  • ProbabilityDistribution
  • i-d-T and p-d-T curves
slide8

https://webspace.utexas.edu/gee272/www/Index_files/GIS/pMovie.wmvhttps://webspace.utexas.edu/gee272/www/Index_files/GIS/pMovie.wmv

precipitation distribution
Precipitation Distribution

Daily Data

Hourly Data

  • 147 Stations
  • AAP = 33.76 inches
  • Uniform
  • 5 Stations
  • AAP = 34.20
  • South East
results
Results
  • 98.7% AAP
  • Same Mean / Different distribution
  • Representative values of precipitation
  • In order to compare, select the same stations
conclusions
Conclusions
  • Derived Data
    • Representative
    • Smaller Extrapolated Area
  • Computational Time
    • Downloading, Processing and Projecting
    • IT fast development
  • HydroDesktop
    • Powerful Tool
    • Sometime Crashes (Beta Version)
questions
Questions?

https://webspace.utexas.edu/gee272/www/Index_files/Page305.htm

Contact Information:

ic.esda@mail.utexas.edu

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