Date post: | 17-Jan-2016 |
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Buffalo National River: Water Levels
By: Cody Hudson
CE 397 Statistics in Water ResourcesUniversity of Texas-Austin
Buffalo National River
Location
Floating Season
Water Level Trends
Correlation
Only a short 10 hour drive!
Location
My Home
Why the Buffalo River?
Gauging Station
Gauge Heights
dx/dy=0 Day of Year Calendar Day
High Flow 85.03 March 25th
Low Flow 238.07 August 25th
y=2 ft Day of Year Calendar DayEnd of Season 179.55 June 28thStart of Season 297.33 October 23rd
Gauge Heights
dx/dy=0 Day of Year Calendar Day
High Flow 92.73 April 2nd
Low Flow 242.06 August 29th
y=3.6 ft Day of Year Calendar DayEnd of Season 215.72 August 3rdStart of Season 268.77 September 25th
-Trends
• Climate Change• Personal Accounts• Gauge Data
-Trends
Parametric Non-Parametric
-Trends-Increase of 1.133 cfs/year
-Increase of 0.454 cfs/year
-Trends
SAS Results for Annual Log Flow vs. Time
Test Result P-Value
Pearson's 0.05475 0.6550
Kendall 0.01503 0.8561
Spearman 0.04088 0.7387
-High P-Value, so Null Hypothesis is not rejected and Flow is NOT dependent on Time.
-Trends-Decrease of -1.067 cfs/year
-Decrease of -0.736 cfs/year
-Trends
SAS Results for August Log Flow vs. Time
Test Result P-Value
Pearson's -0.2467 0.0410
Kendall -0.16189 0.0502
Spearman -0.2405 0.0465
-Small P-Value, so Null Hypothesis is rejected
and Flow IS dependent on Time.
Was I right?
Questions?
-Correlation
-Correlation