GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 3.2 - POSTER GNGTS 2023 Multitemporal and multi-satellite ground subsidence analysis: the overexploitation of groundwater resources reveal basin bedrock organization C. A. Brunori 1 , F. Murgia 2 1 Istituto Nazionale di Geofisica e Vulcanologia 2 CREA-Centro Foreste e Legno, Trento Introduction The European (ESA) and Italian (ASI) space agencies manage and distribute to the research community and industries a huge amount of satellite SAR data since the early ‘90s, thus allowing the generation of long deformation time series. These time series are studied using different multi-temporal SAR interferometry techniques. This work describes the study of ground subsidence that occurred in the Northern Valle Umbra (NVU - Central Italy. Fig. 1) between 1992 and 2016 caused by the over-pumping of water in deep wells (Beretta et al. 2018) using the exploitation of PS long time series produced in the framework of international and national projects. The studied basin is an NW-SE elongated graben, and the shape and evolution of soil subsidence follow the organization of bedrock geometries hidden under unconsolidated valley deposits. In this work, the temporal evolution of soil subsidence is also analyzed to identify evidence of fault systems displacing the bedrock buried under the valley deposits.