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20
50
10
1
Elevation, NGVD (m)
0
-10
2
3
4 5
6
7
8
0
-50
Elevation, NGVD (ft)
-20
-30
-100
20
50
10
Elevation, NGVD (m)
0
-10
0
-50
Elevation, NGVD (ft)
-20
-30
-100
Figure 8.22: The Numerical Model Soil Layering and Grid.
8.9.3.1 Results of Numerical Modeling
A total of six numerical analyses were performed. The Long Valley Dam and Aeropuerto
time histories were applied to the levee with the river stage at the three design water
levels. Horizontal and vertical displacements were monitored for various points on the
levee as shown in Figure 8.23. The computed deformations for each time history are
listed in Tables 8.17 to 8.19. Negative horizontal displacements represent movement
toward the river and negative vertical displacements signify settlement. Maximum
horizontal and vertical displacements were less than 0.6 m (2 ft), which is consistent with
estimates by Youd and Jones (1993).
Note that the computed displacement values have been reported directly into the tables.
The precision implied by the values listed must be tempered by the geotechnical and
numerical uncertainty inherent in the evaluation. Increasing these values by a factor of
two would yield appropriately conservative values in light of their small magnitude.
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