600
2
Outagamie County Airport
SM = 0.0004ISM + 0.2968ISM
R2 = 0.92
WESDEF
ILLIBACK
400
200
SM = 0.0001ISM2 + 0.2918ISM
R2 = 0.51
0
800
1000
200
400
600
ISM (MN/m)
2000
Central Wisconsin Airport
ILLIBACK
1600
y = 0.0209x1.4753
WESDEF
R2 = 0.9601
1200
800
y = 0.0008x1.8606
R2 = 0.8512
400
0
400
800
1200
1600
2000
ISM (MN/m)
Figure 24. Relationship between measured ISM and calculated sub-
grade modulus at Outagamie County Airport and Central Wisconsin
Airport.
CWA
1600
OCA
y = 240185AT 1.248
1200
R2 = 0.91
800
400
0
200
400
600
800
2)
Total Basin Area (mm
a. Calculated using ILLIBACK.
Figure 25. Relationship between total basin area and subgrade modulus at
Outagamie County Airport and Central Wisconsin Airport.
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