appendix m annual flow assessment site statistical summaries...2017 alabama surface water assessment...
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2017 Alabama Surface Water Assessment Report ADECA-OWR
Appendix M
Annual Flow Assessment Site Statistical Summaries
The statistical summaries for the following 15 annual flow assessment sites include non-exceedance flow percentiles for the station’s period of record. These sites are referred to as annual flow assessment sites to differentiate them from the monthly flow assessment sites.
(CFS – cubic feet per second; DA – drainage area, in square miles; CFSM – cubic feet per second per square mile; Q5 – 5th non-exceedance flow percentile)
Flows in CFS Q10/Q50 0.18100% 2.7 Q10/Q90 0.0495% 5.9 DA* = 95.490% 9.1 CFSM*85% 13.1 Qmin/DA 0.0380% 16.1 Q5/DA 0.0670% 24.2 Q10/DA 0.1060% 36.4 Q15/DA 0.1450% 50.9 Q20/DA 0.1740% 67.9 Q30/DA 0.2530% 92.4 Q40/DA 0.3820% 135.1 Q50/DA 0.5310% 220.1 Q60/DA 0.710% 1357.3 Q70/DA 0.97
Average 78.16 Q80/DA 1.42Q90/DA 2.31
Qmax/DA 14.23Qavg/DA 0.82
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual Statistics
02343000 - Barbour Creek near Eufaula, Ala.
Non-Exceedance Percentiles
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-2 | Page
Flows in CFS Q10/Q50 0.48100% 141.81 Q10/Q90 0.3295% 155.71 DA* = 34090% 205.73 CFSM*85% 242.45 Qmin/DA 0.4280% 252.05 Q5/DA 0.4670% 322.07 Q10/DA 0.6160% 404.08 Q15/DA 0.7150% 425.10 Q20/DA 0.7440% 460.21 Q30/DA 0.9530% 522.68 Q40/DA 1.1920% 567.81 Q50/DA 1.2510% 640.84 Q60/DA 1.350% 806.26 Q70/DA 1.54
Average 423.62 Q80/DA 1.67Q90/DA 1.88
Qmax/DA 2.37Qavg/DA 1.25
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual Statistics
02360290 - West Fork Choctawhatchee River near Ozark, Ala.
Non-Exceedance Percentiles
10
100
1,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-3 | Page
Flows in CFS Q10/Q50 0.48100% 20.8 Q10/Q90 0.1895% 36.0 DA* = 56.690% 41.4 CFSM*85% 46.0 Qmin/DA 0.3780% 52.0 Q5/DA 0.6470% 62.4 Q10/DA 0.7360% 73.1 Q15/DA 0.8150% 85.5 Q20/DA 0.9240% 101.2 Q30/DA 1.1030% 125.2 Q40/DA 1.2920% 159.3 Q50/DA 1.5110% 236.1 Q60/DA 1.790% 854.7 Q70/DA 2.21
Average 115.4 Q80/DA 2.81Q90/DA 4.17
Qmax/DA 15.10Qavg/DA 2.04
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02377960 - Blackwater River near Robertsdale, Ala.
1
10
100
1,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-4 | Page
Flows in CFS Q10/Q50 0.60100% 34.9 Q10/Q90 0.2995% 51.7 DA* = 55.390% 57.2 CFSM*85% 61.7 Qmin/DA 0.6380% 67.3 Q5/DA 0.9470% 76.7 Q10/DA 1.0360% 85.9 Q15/DA 1.1250% 96.0 Q20/DA 1.2240% 108.3 Q30/DA 1.3930% 126.1 Q40/DA 1.5520% 149.7 Q50/DA 1.7410% 198.3 Q60/DA 1.960% 497.3 Q70/DA 2.28
Average 119.0 Q80/DA 2.71Q90/DA 3.59
Qmax/DA 8.99Qavg/DA 2.15
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02378500 - Fish River near Silver Hill, Ala.
1
10
100
1,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-5 | Page
Flows in CFS Q10/Q50 0.36100% 6.1 Q10/Q90 0.0895% 10.7 DA* = 39.790% 12.4 CFSM*85% 14.5 Qmin/DA 0.1580% 16.2 Q5/DA 0.2770% 20.4 Q10/DA 0.3160% 27.4 Q15/DA 0.3750% 34.4 Q20/DA 0.4140% 49.3 Q30/DA 0.5130% 69.0 Q40/DA 0.6920% 110.7 Q50/DA 0.8710% 159.1 Q60/DA 1.240% 646.0 Q70/DA 1.74
Average 58.6 Q80/DA 2.79Q90/DA 4.01
Qmax/DA 16.27Qavg/DA 1.48
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02401700 - Ohatchee Creek at Reads, Ala.
1
10
100
1,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-6 | Page
Flows in CFS Q10/Q50 0.41100% 19.4 Q10/Q90 0.1395% 37.0 DA* = 92.290% 42.8 cfsm85% 49.6 Qmin/DA 0.2180% 54.8 Q5/DA 0.4070% 67.2 Q10/DA 0.4660% 86.1 Q15/DA 0.5450% 103.6 Q20/DA 0.5940% 137.1 Q30/DA 0.7330% 176.3 Q40/DA 0.9320% 248.0 Q50/DA 1.1210% 319.2 Q60/DA 1.490% 804.1 Q70/DA 1.91
Average 156.2 Q80/DA 2.69Q90/DA 3.46
Qmax/DA 8.72Qavg/DA 1.69
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02401800 - Tallasseehatchee Creek near Wellington, Ala.
1
10
100
1,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-7 | Page
Flows in CFS Q10/Q50 0.33100% 29.7 Q10/Q90 0.0995% 75.8 DA* = 27790% 92.6 CFSM*85% 112.4 Qmin/DA 0.1180% 128.2 Q5/DA 0.2770% 166.0 Q10/DA 0.3360% 225.7 Q15/DA 0.4150% 282.1 Q20/DA 0.4640% 391.5 Q30/DA 0.6030% 520.8 Q40/DA 0.8120% 758.1 Q50/DA 1.0210% 992.6 Q60/DA 1.410% 2529.4 Q70/DA 1.88
Average 454.5 Q80/DA 2.74Q90/DA 3.58
Qmax/DA 9.13Qavg/DA 1.64
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02404000 - Choccolocco Creek near Jenifer, Ala.
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-8 | Page
Flows in CFS Q10/Q50 0.27100% 56.4 Q10/Q90 0.0995% 125.0 DA* = 47290% 168.9 CFSM*85% 196.0 Qmin/DA 0.1280% 229.0 Q5/DA 0.2670% 327.9 Q10/DA 0.3660% 453.7 Q15/DA 0.4250% 623.9 Q20/DA 0.4940% 891.2 Q30/DA 0.6930% 1111.8 Q40/DA 0.9620% 1505.1 Q50/DA 1.3210% 1973.9 Q60/DA 1.890% 3834.1 Q70/DA 2.36
Average 912.5 Q80/DA 3.19Q90/DA 4.18
Qmax/DA 8.12Qavg/DA 1.93
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02439000 - Buttahatchee River near Sulligent, Ala.
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-9 | Page
Flows in CFS Q10/Q50 0.37100% 41.2 Q10/Q90 0.1395% 56.7 DA* = 13090% 65.2 CFSM*85% 72.0 Qmin/DA 0.3280% 82.9 Q5/DA 0.4470% 106.0 Q10/DA 0.5060% 130.6 Q15/DA 0.5550% 175.0 Q20/DA 0.6440% 237.2 Q30/DA 0.8230% 300.6 Q40/DA 1.0020% 370.1 Q50/DA 1.3510% 512.4 Q60/DA 1.820% 1025.2 Q70/DA 2.31
Average 244.0 Q80/DA 2.85Q90/DA 3.94
Qmax/DA 7.89Qavg/DA 1.88
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02442000 - Luxapallila Creek near Fayette, Ala.
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-10 | Page
Flows in CFS Q10/Q50 0.11100% 2.5 Q10/Q90 0.0295% 7.6 DA* = 8590% 10.8 CFSM*85% 16.5 Qmin/DA 0.0380% 21.6 Q5/DA 0.0970% 39.9 Q10/DA 0.1360% 62.5 Q15/DA 0.1950% 96.7 Q20/DA 0.2540% 169.1 Q30/DA 0.4730% 264.7 Q40/DA 0.7320% 365.6 Q50/DA 1.1410% 562.9 Q60/DA 1.990% 1644.5 Q70/DA 3.11
Average 192.4 Q80/DA 4.30Q90/DA 6.62
Qmax/DA 19.35Qavg/DA 2.26
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual Statistics
02454200 - Wolf Creek near Oakman, Ala.
Non-Exceedance Percentiles
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-11 | Page
Flows in CFS Q10/Q50 0.11100% 1.0 Q10/Q90 0.0295% 2.5 DA* = 45.390% 3.2 CFSM*85% 4.6 Qmin/DA 0.0280% 6.1 Q5/DA 0.0570% 10.2 Q10/DA 0.0760% 17.7 Q15/DA 0.1050% 28.3 Q20/DA 0.1340% 43.4 Q30/DA 0.2330% 71.5 Q40/DA 0.3920% 102.8 Q50/DA 0.6310% 157.0 Q60/DA 0.960% 425.5 Q70/DA 1.58
Average 51.3 Q80/DA 2.27Q90/DA 3.47
Qmax/DA 9.39Qavg/DA 1.13
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual Statistics
02462800 - Davis Creek below Abernant, Ala.
Non-Exceedance Percentiles
0
1
10
100
1,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-12 | Page
Flows in CFS Q10/Q50 0.25100% 5.0 Q10/Q90 0.0595% 7.8 DA* = 73.690% 9.8 CFSM*85% 12.0 Qmin/DA 0.0780% 13.9 Q5/DA 0.1170% 20.1 Q10/DA 0.1360% 27.2 Q15/DA 0.1650% 40.2 Q20/DA 0.1940% 59.2 Q30/DA 0.2730% 93.6 Q40/DA 0.3720% 139.2 Q50/DA 0.5510% 203.8 Q60/DA 0.800% 817.0 Q70/DA 1.27
Average 71.2 Q80/DA 1.89Q90/DA 2.77
Qmax/DA 11.10Qavg/DA 0.97
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual StatisticsNon-Exceedance Percentiles
02465500 - Fivemile Creek near Greensboro, Ala.
1
10
100
1,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-13 | Page
Flows in CFS Q10/Q50 0.13100% 2.7 Q10/Q90 0.0295% 8.0 DA* = 17190% 11.6 CFSM*85% 14.2 Qmin/DA 0.0280% 19.2 Q5/DA 0.0570% 27.8 Q10/DA 0.0760% 47.0 Q15/DA 0.0850% 88.5 Q20/DA 0.1140% 134.2 Q30/DA 0.1630% 206.9 Q40/DA 0.2720% 332.3 Q50/DA 0.5210% 603.0 Q60/DA 0.780% 2654.1 Q70/DA 1.21
Average 210.9 Q80/DA 1.94Q90/DA 3.53
Qmax/DA 15.52Qavg/DA 1.23
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual Statistics
02466500 - Big Prairie Creek near Gallion, Ala.
Non-Exceedance Percentiles
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-14 | Page
Flows in CFS Q10/Q50 0.07100% 0.89 Q10/Q90 0.0195% 3.6 DA* = 25790% 5.8 CFSM*85% 7.6 Qmin/DA 0.0080% 11.3 Q5/DA 0.0170% 18.1 Q10/DA 0.0260% 35.7 Q15/DA 0.0350% 80.6 Q20/DA 0.0440% 138.1 Q30/DA 0.0730% 241.4 Q40/DA 0.1420% 444.8 Q50/DA 0.3110% 959.8 Q60/DA 0.540% 6497.4 Q70/DA 0.94
Average 247.4 Q80/DA 1.73Q90/DA 3.73
Qmax/DA 25.28Qavg/DA 0.96
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Annual Statistics
02468500 - Chickasaw Bogue near Linden, Ala.
Non-Exceedance Percentiles
0
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-15 | Page
Flows in CFS Q10/Q50 0.36100% 77.8 Q10/Q90 0.1195% 157.5 DA* = 49690% 186.6 CFSM*85% 220.9 Qmin/DA 0.1680% 248.1 Q5/DA 0.3270% 313.5 Q10/DA 0.3860% 416.7 Q15/DA 0.4550% 514.3 Q20/DA 0.5040% 703.5 Q30/DA 0.6330% 927.2 Q40/DA 0.8420% 1337.7 Q50/DA 1.0410% 1743.3 Q60/DA 1.420% 4401.2 Q70/DA 1.87
Average 812.5 Q80/DA 2.70Q90/DA 3.51
Qmax/DA 8.87Qavg/DA 1.64
*CFSM - CUBIC FEET PER SECOND PER SQUARE MILE; DA - DRAINAGE AREA IN SQUARE MILES
Non-Exceedance PercentilesAnnual Statistics
02404500 - Choccolocco Creek near Lincoln, Ala.
1
10
100
1,000
10,000
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Stre
amflo
w, i
n CF
S
Non-Exceedance Probability, in %
Annual Flows Non-Exceedance Percentiles
100 90 80 70 60 50 40 30 20 10 0
2017 Surface Water Assessment Report ADECA-OWR
M-16 | Page