1. University of Texas at Austin Ahmad Tavakoly May 05 2009 1

2. Overview Introduction Introduction Project Goal Project Goal Field of Study Field of Study Data Source Data Source Method Method Results Results 2

3. Distance Traveled Travel Time Wave Celerity C = L T 3

4.  Estimate the wave celerity in different reaches  Find celerity within different times  Create celerity map 4

5. Field of Study San Antonio and Guadalupe River Basins Guadalupe Rv. San Antonio Rv. Medina Rv. 5

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7. http://ida.water.usgs.gov/ida/ 15 minutes data intervals 2007-01-01 to 2007-06-30 2004-01-01 to 2004-06-30 7

8. http://www.horizon-systems.com/nhdplus/HSC-wth12.php 8

9.  Determine distance between upstream and downstream gages (ArcGIS)  Find time lag corresponding to the max correlation (HW4 Method) Celerity= Length Time lag 9

10. Determine distance 10

11. Analysis of lag cross correlation between gages Gonzales Lagged Cross Correlation method 11

12. Celerity 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 3.812.752.041.801.541.041.072.493.124.150.961.09 Max Correlation 0.920.940.840.760.360.800.970.760.330.600.820.83 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 min2.402.041.771.220.851.07<15 min5.63<15 min0.700.85 Max Correlation 0.460.950.930.900.760.740.940.840.240.560.890.83 12

13. Celerity 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 City Ingram - Comfort Dilworth - Cuero Mitchell St - Falls City Wave celerity 1.140.830.700.870.571.001.090.910.602.141.290.67 Max Correlation 0.65000.87000.71210.62450.63100.69900.75030.60180.51040.85020.74490.5967 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 City Ingram - Comfort Dilworth - Cuero Mitchell St - Falls City Wave celerity 1.53<15 min4.421.680.651.361.550.600.772.221.680.81 Max Correlation 0.480.660.790.800.760.670.520.790.510.640.670.58 13 Analyzed More than 500,000 Data Points

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17. Downstream Upstream UncertaintyCelerity 17 +-

18. Question???? 18

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