Environmental Engineering Reference
In-Depth Information
results of numerical models is mandatory. From what has been measured in
Ravenna and what was predicted in [GAM 91] with numerical models, we observe
that during the production phase the spatial distribution of measured subsidence is
much more complicated than conventional regional-scale subsidence models can
reproduce. Subsidence models of regional scale alone tend to underestimate the role
of the heterogeneity of structural data and hydraulic and mechanical parameters;
hence they do not correctly predict the differential ground displacements that
represent a hazard for historical buildings in Venice. A more refined prediction of
the effects of local heterogeneities is needed, by following a multi-scale approach
for instance.
Figure 5.25.
Measured surface subsidence for the period 1972 to 1977 in the Ravenna area,
location of the productive wells and reservoir contours
