Implementation of advanced monitoring system network in the Siq of Petra (Jordan)

Abstract

The paper summarizes field survey results and analysis in the framework of a UNESCO project (Siq Stability Project) for the implementation of remote and field integrated monitoring systems aimed at the detection and control of active deformation of the Siq slopes (Petra, Jordan). Petra is located on the eastern side of the Dead Sea-Wadi Araba tectonic depression, in SW Jordan. The Siq is a 1.2 km long natural deep gorge in the sandstone mountains that connects the urban area of Wadi Musa with the monumental area of Petra. Since Nabataean times, the Siq is the main narrow entrance for some thousands tourists that access the archaeological area every day. Discontinuities of various type (bedding, joints, faults), mainly related to stratigraphic setting, tectonic activity and geomorphological evolution of the slope can be recognized. Rock-fall potential activity can be catastrophic according to evolution of the movement (extremely rapid) and involved rock mass volumes. Slope instability, acceleration of crack deformation and consequent increasing of rock-fall hazard conditions could threaten the safety of people walking through the Siq.