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KGS OFR 2003-55C- Appendix A: Lower Arkansas Basin.

Appendix A of KGS OFR 2003-55C provides plots of the mean annual streamflow, total accumulated annual precipitation, and the trends in mean annual streamflow statistically adjusted for precipitation by KWO planning basin. Plots are provided for each unique gaging station and when possible, the composite trend for stations that had a mean annual streamflow value every single year from 1982 to 2001. The R-squared value, which is a measure of the statistical relationship between streamflow and the combination of annual accumulated precipitation and time, is also provided. A measure of the statistical significance in the trend line can be seen with the "Probt" value where if Probt is less than 0.1 indicates a significant trend.


1982 to 2001 Composite Trend: 10 stations are used in this aggregated trend.
Average R-squared value: Entire Period of Record = 0.53860, 1982 to 2001 = 0.53952.
Probt Count: Entire Period of Record = 1 out of 10 stations, 1982 to 2001 = 1.


Station 7142300- RATTLESNAKE C NR MACKSVILLE, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.33912 R-Squared = 0.47223
Probt = 0.0115366207293776 Probt = 0.0533214247653535
Slope = -0.726053711605628 Slope = 0.703237384329756
Change in Trend is statistically significant. Change in Trend is statistically significant.

 


Station 7142575- RATTLESNAKE C NR ZENITH, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.08617 R-Squared = 0.23533
Probt = 0.38534 Probt = 0.387263570662814
Slope = -0.783989824694159 Slope = 1.27575642517821
Change in Trend is not statistically significant. Change in Trend is not statistically significant.

 


Station 7142620- RATTLESNAKE C NR RAYMOND, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.37072
n/a
Probt = 0.0277914991392431
n/a
Slope = -1.18093371260232
n/a
Change in Trend is statistically significant.
n/a

 


Station 7143300- COW C NR LYONS, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.60892 R-Squared = 0.602593
Probt = 0.342527479547255 Probt = 0.52567271717647
Slope = -0.632652629126569 Slope = 1.46017089468812
Change in Trend is not statistically significant. Change in Trend is not statistically significant.

 


Station 7143665- L ARKANSAS R AT ALTA MILLS, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.58583
R-Squared = 0.736097
Probt = 0.922645832718142
Probt = 0.936081601579777
Slope = -0.276592101436845
Slope = -0.353559965244613
Change in Trend is not statistically significant.
Change in Trend is not statistically significant.

 


Station 7144200- L ARKANSAS R AT VALLEY CENTER, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.67288
R-Squared = 0.69948
Probt = 0.899136825379817
Probt = 0.712252053414852
Slope = 0.193494387924216
Slope = -2.96659838633052
Change in Trend is not statistically significant.
Change in Trend is not statistically significant.

 


Station 7144780- NF NINNESCAH R AB CHENEY RE, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.43346
R-Squared = 0.37369
Probt = 0.533640663839147
Probt = 0.474037191369844
Slope = -0.650822821212372
Slope = -1.75254680183102
Change in Trend is not statistically significant.
Change in Trend is not statistically significant.

 


Station 7145200- SF NINNESCAH R NR MURDOCK, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.63445
R-Squared = 0.46857
Probt = 0.253016743269987
Probt = 0.765543649252931
Slope = -0.634669599070657
Slope = 0.513711140246351
Change in Trend is not statistically significant.
Change in Trend is not statistically significant.

 


Station 7145700- SLATE C AT WELLINGTON, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.65863
R-Squared = 0.57597
Probt = 0.503360350592703
Probt = 0.783039484791486
Slope = 0.357075832155298
Slope = -0.309853057487308
Change in Trend is not statistically significant.
Change in Trend is not statistically significant.

 


Station 7149000- MEDICINE LODGE R NR KIOWA, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.60176
R-Squared = 0.570603
Probt = 0.685452866165481
Probt = 0.118480550475176
Slope = 0.287545813197102
Slope = 3.62022999822699
Change in Trend is not statistically significant.
Change in Trend is not statistically significant.

 


Station 7151500- CHIKASKIA R NR CORBIN, KS

Entire Period of Record 1982 to 2001 Time Period
R-Squared = 0.76477
R-Squared = 0.66066
Probt = 0.805204073920576
Probt = 0.609799833264018
Slope = 0.188369555639288
Slope = 1.73771865095336
Change in Trend is not statistically significant.
Change in Trend is not statistically significant.