The Future of the Suwannee River SillA Review and Update

S.B. Aicher – USFWS, Okefenokee NWR

Downstream Flows

Water Quality

Ground-water levels

Effects of the Sill Downstream

• No significant changes in ground-water levels at wells downgradient.

Calcium

Chloride

Iron

Magnesium

Silica

Sodium

Tannin and lignin

Solids residue

Strontium

Zinc

Effects of the Sill Downstream

• No significant changes in ground-water levels at wells downgradient.

• No significant change in concentrations of water-quality constituents in flows at the sill.

Effects of the Sill Downstream

• No significant changes in ground-water levels at wells downgradient.

• No significant change in concentrations of water-quality constituents in flows at the sill.

• The sill increased the base water levels immediately upstream of the sill by 6 ft.

Effects of the Sill Downstream

• No significant changes in ground-water levels at wells downgradient.

• No significant change in concentrations of water-quality constituents in flows at the sill.

• The sill increased the base water levels immediately upstream of the sill by 6 ft.

• No significant changes in water levels downstream from the sill.

Effects of the Sill Downstream

• No significant changes in ground-water levels at wells downgradient.

• No significant change in concentrations of water-quality constituents in flows at the sill.

• The sill increased the base water levels immediately upstream of the sill by 6 ft.

• No significant changes in water levels downstream from the sill.

• The sill decreased the peak flows from the sill to Fargo, Georgia.

Effects of the Sill Downstream

• No significant changes in ground-water levels at wells downgradient.

• No significant change in concentrations of water-quality constituents in flows at the sill.

• The sill increased the base water levels immediately upstream of the sill by 6 ft.

• No significant changes in water levels downstream from the sill.

• The sill decreased the peak flows from the sill to Fargo, Georgia.

• The sill increased the base flows downstream as far as Blue Sink.