GIS Techniques in the Evaluation of Pipeline Network Seismic Hazard

To evaluate seismic risk, it must be taken into account that modern towns depend daily on lifelines and utility systems, that become essential after natural disasters, but are often without any earthquake threat. To evaluate lifelines networks seismic vulnerability, we usually refer to damage models, requiring parameters dealing with pipe features, soil behavior, and seismic hazard of the studied area (peak ground acceleration or velocity, PGA, PGV, or permanent ground displacement, PGD). In this work, models evaluating seismic hazard in a studied area and expected seismic damage for pipeline networks will be applied. A model is shown to assess earthquake induced slope displacements. Some attenuation laws will be selected to evaluate PGA, PGV and PGD. Finally, Repair rate will be calculated for pipes of an important Italian water network feeding 20 towns of Etnean area, referring to three seismic scenario events. Applications will be developed in a GIS environment.