appendix c hec-5 model simulation figures€¦ · – annual: atlanta, columbus, george andrews,...

APPENDIX C

HEC-5 MODEL SIMULATION FIGURES

IOP Consultation Modeling

Concept 5 (IOP) and Concept 6 (RIOP) Comparison

May 2008

Comparisons

Concept 5 -IOP (Current Interim Operations Plan)Concept 6 - RIOP (Revised Interim Operations Plan)• Generation

– Total Annual– Average Monthly Total

• Reservoir Elevations– Range– Maximum, Average, Minimum– Duration

• Flow Duration– Annual: Atlanta, Columbus, George Andrews, Chattahoochee– Monthly: Chattahoochee

Annual Generation

Buford Annual Generation

1960 1965 1970 1975 1980 1985 1990 1995 2000 2005

Ene

rgy

(MW

h)

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

180,000

200,000

220,000

BUFORD DAM CN5_FUL_NOT_U ENERGY-GEN BUFORD DAM CN6_FUL_COE_U ENERGY-GEN

IOP RIOP

West Point Annual Generation

1960 1965 1970 1975 1980 1985 1990 1995 2000 2005

Ene

rgy

(MW

h)

50,000

100,000

150,000

200,000

250,000

WEST POINT CN5_FUL_NOT_U ENERGY-GEN WEST POINT CN6_FUL_COE_U ENERGY-GEN

IOP RIOP

WF George Annual Generation

1960 1965 1970 1975 1980 1985 1990 1995 2000 2005

Ene

rgy

(MW

h)

100,000

200,000

300,000

400,000

500,000

600,000

700,000

W.F. GEORGE CN5_FUL_NOT_U ENERGY-GEN W.F. GEORGE CN6_FUL_COE_U ENERGY-GEN

IOP RIOP

Jim Woodruff Annual Generation

1960 1965 1970 1975 1980 1985 1990 1995 2000 2005

Ene

rgy

(MW

h)

140,000

160,000

180,000

200,000

220,000

240,000

260,000

JIM WOODRUFF CN5_FUL_NOT_U ENERGY-GEN JIM WOODRUFF CN6_FUL_COE_U ENERGY-GEN

IOP RIOP

Monthly Generation

Buford Average Monthly Generation

Mar May Jul Sep Nov3000

Ene

rgy

(MW

h)

6,000

8,000

10,000

12,000

14,000

16,000

18,000

BUFORD DAM CN5_FUL_NOT_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

BUFORD DAM CN6_FUL_COE_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

IOP RIOP

West Point Average Monthly Generation

Mar May Jul Sep Nov3000

Ene

rgy

(MW

h)

6,000

8,000

10,000

12,000

14,000

16,000

18,000

20,000

22,000

WEST POINT CN5_FUL_NOT_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

WEST POINT CN6_FUL_COE_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

IOP RIOP

WF George Average Monthly Generation

Mar May Jul Sep Nov3000

Ene

rgy

(MW

h)

15,000

20,000

25,000

30,000

35,000

40,000

45,000

50,000

55,000

60,000

65,000

W.F. GEORGE CN5_FUL_NOT_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

W.F. GEORGE CN6_FUL_COE_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

IOP RIOP

Jim WoodruffAverage Monthly Generation

Mar May Jul Sep Nov3000

Ene

rgy

(MW

h)

15,000

16,000

17,000

18,000

19,000

20,000

21,000

JIM WOODRUFF CN5_FUL_NOT_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

JIM WOODRUFF CN6_FUL_COE_U[31JAN1939-29FEB2008] ENERGY-GEN-AVER

IOP RIOP

Pool Elevation Range

Lake LanierRevised IOP

Mar May Jul Sep Nov3000

Ele

v (ft

)

1,050

1,055

1,060

1,065

1,070

1,075

1,080

BUFORD DAM CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MAX

BUFORD DAM CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MIN

BUFORD DAM CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-AVER

BUFORD DAM ZONE1 ELEV

Pool RangeAverageRule Curve

West Point LakeRevised IOP

Mar May Jul Sep Nov3000

Ele

v (ft

)

620

625

630

635

640

WEST POINT CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MAX

WEST POINT CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MIN

WEST POINT CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-AVER

WEST POINT ZONE1 ELEV

Pool RangeAverageRule Curve

WF George LakeRevised IOP

Mar May Jul Sep Nov3000

Ele

v (ft

)

184

185

186

187

188

189

190

191

W.F. GEORGE CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MAX

W.F. GEORGE CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MIN

W.F. GEORGE CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-AVER

W.F. GEORGE ZONE1 ELEV

Pool RangeAverageRule Curve

Buford - Average Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

1,065.0

1,065.5

1,066.0

1,066.5

1,067.0

1,067.5

1,068.0

1,068.5

1,069.0

1,069.5

1,070.0

BUFORD DAM CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-AVER

BUFORD DAM CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-AVER

IOP RIOP

Buford – Maximum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

1,070

1,071

1,072

1,073

1,074

1,075

1,076

1,077

1,078

BUFORD DAM CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MAX

BUFORD DAM CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MAX

IOP RIOP

Buford - Minimum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

1,050

1,052

1,054

1,056

1,058

1,060

1,062

BUFORD DAM CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MIN

BUFORD DAM CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MIN

IOP RIOP

West Point – Average Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

627

628

629

630

631

632

633

634

WEST POINT CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-AVER

WEST POINT CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-AVER

IOPRIOP

IOP RIOP

West Point – Maximum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

628

630

632

634

636

638

640

642

WEST POINT CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MAX

WEST POINT CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MAX

IOP RIOP

West Point - Minimum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

620

622

624

626

628

630

632

WEST POINT CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MIN

WEST POINT CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MIN

IOP RIOP

WF George – Average Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

187.8

188.0

188.2

188.4

188.6

188.8

189.0

189.2

189.4

189.6

189.8

W.F. GEORGE CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-AVER

W.F. GEORGE CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-AVER

IOP RIOP

WF George – Maximum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

188.0

188.5

189.0

189.5

190.0

190.5

191.0

W.F. GEORGE CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MAX

W.F. GEORGE CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MAX

IOP RIOP

WF George – Minimum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

184.0

184.5

185.0

185.5

186.0

186.5

187.0

187.5

188.0

188.5

W.F. GEORGE CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MIN

W.F. GEORGE CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MIN

IOP RIOP

Jim Woodruff – Average Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

77.1

77.2

77.3

77.4

77.5

77.6

77.7

77.8

77.9

JIM WOODRUFF CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-AVER

JIM WOODRUFF CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-AVER

IOP RIOP

Jim Woodruff – Maximum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

78.0

78.5

79.0

79.5

80.0

JIM WOODRUFF CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MAX

JIM WOODRUFF CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MAX

IOP RIOP

Jim Woodruff – Minimum Elevation

Mar May Jul Sep Nov3000

Ele

v (ft

)

74.5

75.0

75.5

76.0

76.5

77.0

77.5

78.0

JIM WOODRUFF CN5_FUL_NOT_U[01JAN1939-30MAR2008] ELEV-MIN

JIM WOODRUFF CN6_FUL_COE_U[01JAN1939-30MAR2008] ELEV-MIN

IOP RIOP

Buford Average Elevation 1976-2007

Mar May Jul Sep Nov3000

Ele

v (ft

)

1,063

1,064

1,065

1,066

1,067

1,068

1,069

1,070

1,071

BUFORD OBSERVED[1976-2007] ELEV-AVER BUFORD DAM CN6_FUL_COE_U[1976-2007] ELEV-AVER

IOP RIOP

Pool Elevation Duration

Buford

1045.00

1050.00

1055.00

1060.00

1065.00

1070.00

1075.00

1080.00

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Percent Exceedance

Ele

vatio

n in

Fee

t

Concept 5 Concept 6

Buford Pool DurationIOP RIOP

Buford

1045.00

1050.00

1055.00

1060.00

1065.00

1070.00

50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%

Percent Exceedance

Ele

vatio

n in

Fee

t

Concept 5 Concept 6

Buford Pool DurationIOP RIOP

West Point

620.00

625.00

630.00

635.00

640.00

645.00

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Percent Exceedance

Ele

vatio

n in

Fee

t

Concept 5 Concept 6

West Point Pool DurationIOP RIOP

West Point

619.00

621.00

623.00

625.00

627.00

629.00

631.00

633.00

635.00

50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%

Percent Exceedance

Ele

vatio

n in

Fee

t

Concept 5 Concept 6

West Point Pool DurationIOP RIOP

WF George

184.00

185.00

186.00

187.00

188.00

189.00

190.00

191.00

192.00

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Percent Exceedance

Ele

vatio

n in

Fee

t

Concept 5 Concept 6

WF George Pool DurationIOP RIOP

Jim Woodruff

74.00

75.00

76.00

77.00

78.00

79.00

80.00

81.00

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Percent Exceedance

Ele

vatio

n in

Fee

t

Concept 5 Concept 6

Jim Woodruff Pool DurationIOP RIOP

Buford Pool Monthly Duration

Buford Pool Monthly Duration - January

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,050

1,055

1,060

1,065

1,070

1,075

1,080

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN Interpolated

IOP RIOP

Buford Pool Monthly Duration - February

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,050

1,055

1,060

1,065

1,070

1,075

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U FEB Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U FEB Interpolated

IOP RIOP

Buford Pool Monthly Duration - March

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,055

1,060

1,065

1,070

1,075

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U MAR Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U MAR Interpolated

IOP RIOP

Buford Pool Monthly Duration - April

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,058

1,060

1,062

1,064

1,066

1,068

1,070

1,072

1,074

1,076

1,078

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U APR Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U APR Interpolated

IOP RIOP

Buford Pool Monthly Duration - May

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,058

1,060

1,062

1,064

1,066

1,068

1,070

1,072

1,074

1,076

1,078

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U MAY Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U MAY Interpolated

IOP RIOP

Buford Pool Monthly Duration - June

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,058

1,060

1,062

1,064

1,066

1,068

1,070

1,072

1,074

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JUN Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JUN Interpolated

IOP RIOP

Buford Pool Monthly Duration - July

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,056

1,058

1,060

1,062

1,064

1,066

1,068

1,070

1,072

1,074

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JUL Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JUL Interpolated

IOP RIOP

Buford Pool Monthly Duration - August

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,055

1,060

1,065

1,070

1,075

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U AUG Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U AUG Interpolated

IOP RIOP

Buford Pool Monthly Duration - September

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,050

1,055

1,060

1,065

1,070

1,075

1,080

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U SEP Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U SEP Interpolated

IOP RIOP

Buford Pool Monthly Duration - October

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,050

1,055

1,060

1,065

1,070

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U OCT Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U OCT Interpolated

IOP RIOP

Buford Pool Monthly Duration - November

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,050

1,055

1,060

1,065

1,070

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U NOV Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U NOV Interpolated

IOP RIOP

Buford Pool Monthly Duration - December

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Ele

v (ft

)

1,045

1,050

1,055

1,060

1,065

1,070

1,075

1,080

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U DEC Interpolated

BUFORD DAM 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U DEC Interpolated

IOP RIOP

Flow Durations

Atlanta Annual Flow Duration

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

ATLANTA 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

ATLANTA 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

Atlanta Annual Flow Duration

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

500

1,000

1,500

2,000

ATLANTA 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

ATLANTA 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

Columbus Annual Flow Duration

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

45,000

COLUMBUS GAGE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

COLUMBUS GAGE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

Columbus Annual Flow Duration

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

1,000

2,000

3,000

4,000

5,000

COLUMBUS GAGE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

COLUMBUS GAGE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

George Andrews Annual Flow Duration

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

GEORGE ANDREWS 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

GEORGE ANDREWS 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

George Andrews Annual Flow Duration

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

GEORGE ANDREWS 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

GEORGE ANDREWS 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

Chattahoochee Annual Flow Duration

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

20,000

40,000

60,000

80,000

100,000

120,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

Chattahoochee Annual Flow Duration

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

18,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN-DEC Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN-DEC Interpolated

IOP RIOP

Chattahoochee Monthly Flow Duration

• The following slides compare the monthly flow duration for the current IOP and the Revised IOP

• The major difference occurs during the extreme low flow events (15 Percentile).

• Under the Revised IOP, flows are reduced during the spawning months March-May as the composite storage transitions from zone 2 to zone 3

• The minimum flow requirement is not the driver of the system, because the 90th percentile flow is greater than the required flow.

• During the dry months Sep – Nov the Revised IOP is less than the IOP because of the drought plan. (for example the 90th percentile is 6500 under the IOP but 5000 under the Revised IOP.

Monthly Flow Duration - March

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

50,000

100,000

150,000

200,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U MAR Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U MAR Interpolated

IOP RIOP

Monthly Flow Duration - March

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

5,000

10,000

15,000

20,000

25,000

30,000

35,000

40,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U MAR Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U MAR Interpolated

IOP RIOP

Monthly Flow Duration - April

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

20,000

40,000

60,000

80,000

100,000

120,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U APR Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U APR Interpolated

IOP RIOP

Monthly Flow Duration - April

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

5,000

10,000

15,000

20,000

25,000

30,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U APR Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U APR Interpolated

IOP RIOP

Monthly Flow Duration - May

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

100,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U MAY Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U MAY Interpolated

IOP RIOP

Monthly Flow Duration - May

Percent EXCEEDANCE

20 30 40 50 60 70 80 90 100

Flow

(cfs

)

5,000

10,000

15,000

20,000

25,000

30,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U MAY Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U MAY Interpolated

IOP RIOP

Monthly Flow Duration - June

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JUN Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JUN Interpolated

IOP RIOP

Monthly Flow Duration - June

Percent EXCEEDANCE

40 50 60 70 80 90 100

Flow

(cfs

)

2,000

4,000

6,000

8,000

10,000

12,000

14,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JUN Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JUN Interpolated

IOP RIOP

Monthly Flow Duration - July

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

50,000

100,000

150,000

200,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JUL Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JUL Interpolated

IOP RIOP

Monthly Flow Duration - July

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

2,000

4,000

6,000

8,000

10,000

12,000

14,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JUL Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JUL Interpolated

IOP RIOP

Monthly Flow Duration - August

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U AUG Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U AUG Interpolated

IOP RIOP

Monthly Flow Duration - August

Percent EXCEEDANCE

40 50 60 70 80 90 100

Flow

(cfs

)

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U AUG Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U AUG Interpolated

IOP RIOP

Monthly Flow Duration - September

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U SEP Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U SEP Interpolated

IOP RIOP

Monthly Flow Duration - September

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

2,000

4,000

6,000

8,000

10,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U SEP Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U SEP Interpolated

IOP RIOP

Monthly Flow Duration - October

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U OCT Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U OCT Interpolated

IOP RIOP

Monthly Flow Duration - October

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

2,000

4,000

6,000

8,000

10,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U OCT Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U OCT Interpolated

IOP RIOP

Monthly Flow Duration - November

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

90,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U NOV Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U NOV Interpolated

IOP RIOP

Monthly Flow Duration - November

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

2,000

4,000

6,000

8,000

10,000

12,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U NOV Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U NOV Interpolated

IOP RIOP

Monthly Flow Duration - December

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

20,000

40,000

60,000

80,000

100,000

120,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U DEC Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U DEC Interpolated

IOP RIOP

Monthly Flow Duration - December

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U DEC Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U DEC Interpolated

IOP RIOP

Monthly Flow Duration - January

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

20,000

40,000

60,000

80,000

100,000

120,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN Interpolated

IOP RIOP

Monthly Flow Duration - January

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

5,000

10,000

15,000

20,000

25,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U JAN Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U JAN Interpolated

IOP RIOP

Monthly Flow Duration - February

Percent EXCEEDANCE

0 10 20 30 40 50 60 70 80 90 100

Flow

(cfs

)

0

20,000

40,000

60,000

80,000

100,000

120,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U FEB Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U FEB Interpolated

IOP RIOP

Monthly Flow Duration - February

Percent EXCEEDANCE

50 60 70 80 90 100

Flow

(cfs

)

0

5,000

10,000

15,000

20,000

25,000

30,000

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN5_FUL_NOT_U FEB Interpolated

CHATTAHOOCHEE 1DAY: 01JAN1939-31DEC2008 CN6_FUL_COE_U FEB Interpolated

IOP RIOP

Chattahoochee Flow Concept 6

1000

10000

100000

1000000

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

Percent Exceedance

Flow

in C

FS

Regulalted Required

RIOP Chattahoochee FlowRequired vs Regulated