REPORT OF INVESTIGATIONS NO. 42 83


 Pumping tests were conducted in Green Swamp area and
vicinity to determine coefficients of transmissibility (T) and storage
(S) for the Floridan aquifer. The results of the tests are presented
in table 10. Values of T ranged from about 20,000 gpd/ft to about
700,000 gpd/ft. The storage coefficients ranged from 0.013 to 0.0018
which means that for 1 foot change in head of the piezometric



 TABLE 10. Pumping test data (Floridan aquifer)


 Aquifer Average field
 Coefficient Coefficient penetration coefficient of
 transmissibility Coefficient of leakage (nearest permeability
 Well number gpd/ft) of storage (gpd/ft2/ft) ten feet) (gpd/ft2)

 (a) Determined by one or more observation wells

 807-154-4 "5r720,000 "0.0036 1,130 637
 808-153-2 520.000 .0057 510 1,020
 814-139-5 b'C680,000 .0018 .... 350 1,940
 814-139-5 b'cl,150,000 .012 0.042 350 3,280
 816-135-2 120,000 .011 ._- 360 333
 821-202-1 c22,000 .003 .022 130 169
 828-154-2 293,000 .013 .036 260 1,130

 (b) Determined by observations in the pumped well

 807-154-4 I*'1,150,000 1. 1,130 1,020
 810-144-1 110,000 340 324
 813-149-1 40,000 .. 140 286
 813-201-1 62,000 ... .... 240 258
 814-139-5 c120,000 350 340
 814-143-1 77,000 200 385
 814-134-1 37,000 _160 231
 815-149-3 29,000 170 171
 815-157-2 84,000 .... 130- 646
 816-206-1 150,000 _. 180 833
 821-202-1 c22,000 _130 169
 822-138-1 26,000 230 113
 822-149-1 32.000 130 246
 826-211-1 300.000 190 -1,580
 827-158-1 57,000 160 356
 832-154-1 28,000 100 280


aAverage of two tests.
bDetermined to be invalid.
CAnalysed by Theis (1935)


See pumping test analysis section.
type curve and semilog method (Jacob, 1950).