ALTERNATIVE APPROACHES FOR WATER EXTRACTION IN AREAS

SUBJECT TO SALTWATER UPCONING

David L. Tarbox, P.G., P.H.G.William C. Hutchings, P.G.

HSA Engineers & Scientists, Tampa, FL

Simulate LATERAL INTRUSION by reducing the

quantity of recharge by the same volume being

withdrawn

Withdrawal (Q)

T-1T-2

T-3

Recharge

UPCONING is influenced by:

Horizontal and vertical hydraulic conductivities,

Rate and method of groundwater extraction, Proximity of the intake to the interface

Withdrawal (Q)

T-1

T-3T-2

-5.0 m-0.5 m

STRATIGRAPHY

ELEVATION

Fully Penetrating

Shallow

Trench

250 MG/L 500 MG/L

1,000 MG/L

5,000 MG/L

10,000 MG/L

20,000 MG/L

Salinity

Uniform Recharge: 0.001 meter/day

250 MG/L

500 MG/L

1,000 MG/L

5,000 MG/L

10,000 MG/L

20,000 MG/L

Salinity

Discharge Rate: 384 m3/day

Salinity

250 MG/L

500 MG/L

1,000 MG/L

5,000 MG/L

10,000 MG/L

20,000 MG/L

Discharge Rate: 384 m3/day

HORIZONTAL TRENCH

Salinity

250 MG/L

500 MG/L

1,000 MG/L

5,000 MG/L

10,000 MG/L

20,000 MG/L

Discharge Rate: 384 m3/day

APPLICATION

CONCLUSIONSWith Suitable Conditions

Encourage similar approaches by large users of irrigation water

Golf Courses, Nurseries, & SubdivisionsProtect groundwater from saltwater

intrusion