Science Service System

Summary of Proposal GEO1616

TitleGround deformation monitoring due to aquifer ground water exploitation and expansive soils in Madrid (Spain)
Investigator Tomás-Jover, Roberto - University of Alicante, Ingeniería de la Construcción, OO.PP. e Infraestructura Urbana
Team Member
Dr Lopez-Sanchez, Juan Manuel - Universidad de Alicante, Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Dr Mallorquí, Jordi - Universidad Politécnica de Barcelona, Departamento de Teoria de la Señal y Comunicaciones
Dr Herrera, Gerardo - Instituto Geológico y Minero de España, Área de Peligrosidad y Riesgos Geológicos
Dr Béjar, Marta - Instituto Geológico y Minero de España, Área de Peligrosidad y Riesgos Geológicos
MSc Mulas, Joaquín - Instituto Geológico y Minero de España, Área de Peligrosidad y Riesgos Geológicos
Dr Fernández-Merodo, José Antonio - Instituto Geológico y Minero de España, Área de Peligrosidad y Riesgos Geológicos
MSc Sanabria, Margarita P. - Instituto Geológico y Minero de España, Área de Peligrosidad y Riesgos Geológicos
MSc Cano, Miguel - Universidad de Alicante, Ingeniería de la Construcción, OO.PP. e Infraestructura Urbana
Dr García-Barba, Javier - Universidad de Alicante, Ingeniería de la Construcción, OO.PP. e Infraestructura Urbana
MSc Navarro-Sánchez, Víctor D. - Universidad de Alicante, Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
MSc Vicente, Fernando - Universidad de Alicante, Instituto universitario de investigación Informática
MSc Centolanza, Giuseppe - Universidad Politécnica de Barcelona, Departamento de Teoria de la Señal y Comunicaciones
MSc Iglesias, Rubén - Universidad Politécnica de Barcelona, Departamento de Teoria de la Señal y Comunicaciones
MSc Monells, Daniel - Universidad Politécnica de Barcelona, Departamento de Teoria de la Señal y Comunicaciones
MSc García López-Davalillo, Juan Carlos - Instituto Geológico y Minero de España, Área de Peligrosidad y Riesgos Geológicos
SummaryThe project is aimed to study ground deformation in the region of Madrid. Our main area of interest is located north of the city of Madrid. A big Tertiary aquifer located beneath this region has experienced recent variations in the water level and previous work using ERS data suggested a relationship between surface deformations occurred in the interval 1995 – present. Ground subsidence induced by overexploitation of aquifers is a common problem affecting urban areas and can be well characterized by radar interferometry. In Spain, Murcia subsidence and its effects to civil structures has been extensively analyzed using radar interferometry, but ground deformation in Madrid due to groundwater withdrawal has been the subject of less research. Our second area of interest is located south of the city of Madrid, where expansive soils cover large urban areas and are responsible of widespread damages affecting civil structures. This proposal aims to measure ground deformation in our two areas of interest and its temporal evolution by computing deformation time-series from TerraSAR-X images. We will use both, a small baseline approach and a persistent scatterer method for the analysis of X-band SAR datasets. From this analysis the following main results will be delivered: Differential interferograms; Subsidence rate map; Temporal evolution of subsidence rate maps; spatial and temporal analysis of radar deformation data with geological data; elaboration of geological-geotechnical model of the regional subsidence process; elaboration of geotechnical-structural model of the local subsidence process that might be affecting urban structures and infrastructures. This work will be performed within “InSARlab” project and “SAR Multitemporal y multidimensional para observación de la tierra: procesado y aplicaciones (TEC2011-28201-C02-02)” projects. The first one is funded by a Geological Survey of Spain (IGME) internal project, that will benefit from IGME experience gained on other going research European projects such as DO-SMS INTERREG IV, GMES Terrafirma, FP7 DORIS and FP7 PANGEO. The main purpose of InSARlab project is to: (1) extend the research of DInSAR applications to geohazards; (2) to disseminate among scientists, engineers and educators the potential applications of DInSAR techniques; (3) as well as to provide training on how to exploit these data for the analysis of regional and local ground deformation processes. The second project, funded by the Spanish Ministry will be developed through three main lines of activities: 1. Research on novel multidimensional SAR instruments and missions. 2. Processing, analysis and modeling of time series of multidimensional SAR data. 3. Assessment of advanced SAR applications in urban, land and sea environments. The scientific objective of this project is to demonstrate the applicability of multi-dimensional SAR systems for monitoring natural risks like subsidence, landslides or urban deformation, and also improving information retrieval algorithms for agriculture applications. The project will be focused on: 1.Processing SAR images of TerraSAR-X with advanced DInSAR techniques over some test-sites located in Madrid. 2.Compare the results of TerraSAR-X data with the results obtained from different SAR-satellite data; 3.Compare and integrate the results of the interferometric processing to ground-truth displacement measurements; 4.For subsidence, analyse the results and their time-series in order to: -compare them with the factors/actions that cause subsidence -validate and improve subsidence prediction models.

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