InSAR Time Series Analysis of Natural and Anthropogenic Coastal Plain Subsidence: The Case of Sibari (Southern Italy)

Remote Sensing

Giuseppe Cianflone²  Cristiano Tolomei³  Carlo Alberto Brunori³  Rocco Dominici²  Roberto Tomas¹  Richard Gloaguen¹ 

[1] Department of Biology, Ecology and Earth Sciences, University of Calabria, Via P. Bucci, cubo 15B, 87036 Arcavacata di Rende (Cs), ItalyDepartment of Biology, Ecology and Earth Sciences, University of Calabria, Via P. Bucci, cubo 15B, 87036 Arcavacata di Rende (Cs), Italy;Istituto Nazionale di Geofisica e Vulcanologia (INGV), Via di Vigna Murata, 605, 00143 Rome, Italy;

关键词: SBAS-InSAR;    Sibari Plain;    subsidence;    geology;    anthropic processes;   

DOI  :  10.3390/rs71215812

来源: mdpi

【 摘 要 】

We applied the Small Baseline Subset multi-temporal InSAR technique (SBAS) to two SAR datasets acquired from 2003 up to 2013 by Envisat (ESA, European Space Agency) and COSMO-SkyMed (ASI, Italian Space Agency) satellites to investigate spatial and temporal patterns of land subsidence in the Sibari Plain (Southern Italy). Subsidence processes (up to ~20 mm/yr) were investigated comparing geological, hydrogeological, and land use information with interferometric results. We suppose a correlation between subsidence and thickness of the Plio-Quaternary succession suggesting an active role of the isostatic compensation. Furthermore, the active back thrusting in the Corigliano Gulf could trigger a flexural subsidence mechanism even if fault activity and earthquakes do not seem play a role in the present subsidence. In this context, the compaction of Holocene deposits contributes to ground deformation. Despite the rapid urbanization of the area in the last 50 years, we do not consider the intensive groundwater pumping and related water table drop as the main triggering cause of subsidence phenomena, in disagreement with some previous publications. Our interpretation for the deformation fields related to natural and anthropogenic factors would be a comprehensive and exhaustive justification to the complexity of subsidence processes in the Sibari Plain.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.