An inventory of Land Subsidence along the southern coast of Spain detected by satellite radar interferometry

Abstract

International Workshop on “Advances in the Science and Applications of SAR Interferometry and Sentinel-1 InSAR (10º. 2017. Helsinki)Multi-temporal InSAR methods are effective tools for monitoring and investigating surface displacement on Earth based on conventional radar interferometry. These techniques allow us to measure deformation with uncertainties of one millimeter per year, interpreting time series of interferometric phases at coherent point scatterers (PS). Over the last decades, coastal areas in many parts of Spain have undergone a continuous urban expansion because of the growth of cities and development of new residential areas. The transgression of the sea, as a consequence of sea level rise and the subsidence of populated areas, may result in serious problems to many constructions situated in the coastline. This has an important impact on the economy, environment and society, representing a considerable natural hazard. We use ERS-1/2 and Envisat data in the period 1992-2010 to detect subsidence areas over the southern Spanish coast using time series analysis of SAR data.Departamento de Ingeniería Cartográfica, Geodésica y Fotogrametría, Universidad de Jaén, EspañaCentro de Estudios Avanzados en Ciencias de la Tierra, Universidad de Jaén, EspañaGrupo de investigación Microgeodesia Jaén, Universidad de Jaén, EspañaInstituto Geológico y Minero de España, EspañaPeer reviewe