“Storm precipitation analysis in Dallas County” “GIS in Water Resources” by Gonzalo E. Espinoza.

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Presentation transcript:

“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 ▫Data Processing ▫Results

Data Acquisition 13 years ▫ Virtual Stations Daily Data (147) ▫697,500 Hourly Data (5) ▫569,00

Precipitation: Raw Data DailyHourly

Data Processing Export table HydroDesktop Add Table ArcGIS Project x,y Time Enabled bar Thiessen Polygons Tool Mean Center Maximum Series ▫Daily ▫Hourly Probability Distribution i-d-T and p-d-T curves

Maximum Series

Probability Distributions

Precipitation Distribution Daily DataHourly Data 147 Stations AAP = inches Uniform 5 Stations AAP = South East

Results 98.7% AAP Same Mean / Different distribution Representative values of precipitation In order to compare, select the same stations

Conclusions Derived Data ▫Representative ▫Smaller Extrapolated Area Computational Time ▫Downloading, Processing and Projecting ▫IT fast development HydroDesktop ▫Powerful Tool ▫Sometime Crashes (Beta Version)

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