Environmental Engineering Reference
In-Depth Information
Figure 5.26
.
Subsidence isolines for the period 1982 to 1998 and available benchmark
points: horizontal and vertical axes are labeled with geographical coordinates expressed in
meters using Gauss-Boaga projection
5.3. Conclusions
In this chapter we first presented a mathematical model in a synthetic way, based
on Biot's theory, and its numerical solution in the frame of the finite element
method. This model is very useful in the simulation of subsidence due to water
extraction from shallow aquifers. After a short discussion of the modeling aspects
and problems, we applied the application to the case study of Venice, where
subsidence has been modeled in axisymmetric conditions. The second example
deals with the settlement of the geothermal town of Abano Terme. In this case we
applied a thickness-integrated model in order to fully represent three-dimensional
conditions linked to the variability of the aquifer thickness and irregularity of well
distribution.
These case studies demonstrate that a simulation, including a predictive one, is
possible when geologists, hydrologists, mechanicians and numerical analysts
cooperate closely, since we are facing a truly multidisciplinary problem.
