Georgia Water Use

Dr. Jim HookNational Environmentally Sound Production

Agriculture LaboratoryApril 12, 2001

Suwannee River Symposium

Ag Water Use – EPD Permits

Source Permits #

Ave gpm

Total gpm

Potential Mgd

GW 1,568 530 830,000 1,200

SW 3,276 935 3,060,000

4,410

Total 4,844 800 3,890,000

5,610

Ag Water Use – EPD Permits

Source Permits #

Ave acre

Total Permit

acre

Cropland acre

GW 1,568 112 176,800 -

SW 3,276 71 233,100 -

Total 4,844 86 409,900 704,400

EPD Permitted Acres: Discrepancies

1. Unpermitted Systems +2. Unused Permits -3. Duplicate (same field, later) -4. Duplicate (W2P & 2 source) -5. Irrigate more than permit +(19%)

6. Irrigate less than permit -(52%)

7. ‘Padded’ acres -

Ag Water Use – Adjusted EPD Acres

Source Permits #

Prob. Permit

acre

Prob. Y2K use acre-in

GW 1,568 103,000 880,000

SW 3,276 198,000 1,670,000

Total 4,844 301,000 2,550,000

Ag Water Use–Extension Y2K Survey

Source Systems #

Irrigated acre

Calc. Y2K use acre-in

GW 1,768 115,000 916,000

SW 1,544 100,000 797,000

W2P 627 41,000 327,000

Total 3,940 256,000 2,040,000

EPD adjTotal

4,844 301,000 2,550,000

Annual Irrigation Withdrawals

Source Irr Amtannualized

Irr AmtMay-Sep

Irr AmtMax-1 mo

GW (mgd) 68 165 412

SW (mgd) 59 142 355

W2P (mgd)

24 58 145

Total (mgd)

151 365 912

All Water Use – Ext Irr, EPD oth

Source

MGD

Irrig

MGD Municip

al

MGD

Public

MGD Individual

MGD Industry

GW 68 42 19 12 23

SW 59 0 0 0 0

W2P 24 0 0 0 0

Total 151 42 19 12 23

All Water Use – Annualized

0

20

40

60

80

100

120

140

160

Irrigation Mun&Pub Private Industry

Equivalent Surface Flow for Irrigation

Source Irr Flowannualize

d

Irr FlowMay-Sep

Irr FlowMax-1 mo

GW (mgd)

68 165 412

SW (mgd)

59 142 355

W2P (mgd)

24 58 145

SW (cfs) 91 220 550

W2P (cfs)

37 90 220

Summary