ahmad tavakoly may 05 2009
DESCRIPTION
University of Texas at Austin. Investigation of wave celerity ( c ) variations with time and space in Guadalupe and San Antonio River Basins. Ahmad Tavakoly May 05 2009. Overview. Introduction Project Goal Field of Study Data Source Method Results. Introduction. - PowerPoint PPT PresentationTRANSCRIPT
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Investigation of wave celerity (c) variations with time and space in
Guadalupe and San Antonio River Basins
University of Texas at Austin
Ahmad TavakolyMay 05 2009
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Overview•Introduction
•Project Goal
•Field of Study
•Data Source
•Method
•Results
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Introduction
Wave Celerity Model
The wave celerity is the velocity with which a wave travels along the channel or river
Distance Traveled
Travel Time
Wave Celerity C =
L
T
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Project Goals
Estimate the wave celerity in different reaches
Find celerity within different times
Create celerity map
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Field of StudySan Antonio and Guadalupe River Basins
Guadalupe Rv.
San Antonio Rv.
Medina Rv.
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Data Sourcehttp://ida.water.usgs.gov/ida/
15 minutes data intervals2007-01-01 to 2007-06-302004-01-01 to 2004-06-30
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http://www.horizon-systems.com/nhdplus/HSC-wth12.php
Data Source
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Method
Determine distance between upstream and downstream gages (ArcGIS)
Find time lag corresponding to the max correlation (HW4 Method)
Celerity=
Length
Time lag
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MethodDetermine distance
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MethodAnalysis of lag cross correlation between gages
Gonzales
Lagged Cross Correlation method
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ResultsCelerity for different time and gages
Wave celerity (m/s),2007,Cedric
Hunt - Kerrville
Ingram - Kerrville
Kerrville - Comfort
Comfort - Spring Branch
Sattler - Gonzales
Gonzales - Cuero
Cuero - Victoria
Schroeder - Victoria
Bandera - Macdona
Macdona - Elmendorf
Elmendorf - Falls City
Falls City - Goliad
Wave celerity 3.81 2.75 2.04 1.80 1.54 1.04 1.07 2.49 3.12 4.15 0.96 1.09
Max Correlation 0.92 0.94 0.84 0.76 0.36 0.80 0.97 0.76 0.33 0.60 0.82 0.83
Wave celerity (m/s),2004,Cedric
Hunt - Kerrville
Ingram - Kerrville
Kerrville - Comfort
Comfort - Spring Branch
Sattler - Gonzales
Gonzales - Cuero
Cuero - Victoria
Schroeder - Victoria
Bandera - Macdona
Macdona - Elmendorf
Elmendorf - Falls City
Falls City - Goliad
Wave celerity <15 min 2.40 2.04 1.77 1.22 0.85 1.07 <15 min 5.63 <15 min 0.70 0.85
Max Correlation 0.46 0.95 0.93 0.90 0.76 0.74 0.94 0.84 0.24 0.56 0.89 0.83
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ResultsCelerity for different time and gages
Wave celerity(m/s), 2004 Ahmad
Braunfels- Gonzales
Luling - Gonzales
Westhoff - Cuero
Westhoff - Victoria
Cibolo Ck - Goliad
Mitchell St - Elmendorf
Kyle - Gonzales Runge- Goliad Loop 410 -
Falls CityIngram - Comfort
Dilworth - Cuero
Mitchell St - Falls City
Wave celerity 1.14 0.83 0.70 0.87 0.57 1.00 1.09 0.91 0.60 2.14 1.29 0.67
Max Correlation 0.6500 0.8700 0.7121 0.6245 0.6310 0.6990 0.7503 0.6018 0.5104 0.8502 0.7449 0.5967
Wave celerity(m/s), 2007 Ahmad
Braunfels- Gonzales
Luling - Gonzales
Westhoff - Cuero
Westhoff - Victoria
Cibolo Ck - Goliad
Mitchell St - Elmendorf
Kyle - Gonzales Runge- Goliad Loop 410 -
Falls CityIngram - Comfort
Dilworth - Cuero
Mitchell St - Falls City
Wave celerity 1.53 <15 min 4.42 1.68 0.65 1.36 1.55 0.60 0.77 2.22 1.68 0.81
Max Correlation 0.48 0.66 0.79 0.80 0.76 0.67 0.52 0.79 0.51 0.64 0.67 0.58
Analyzed More than 500,000 Data Points
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Results
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Results
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Results
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Conclusion
Downstream
Upstream
Uncertainty Celerity+ -
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Question????