Science Service System
You are here : Home : Proposals_Summary

Summary of Proposal HYD3259

TitleViability studio of critical hydrologic structures monitoring using high resolution TerraSAR-X Spotlight imagery
Investigator Escayo, Joaquin - Institute of Geosciences, CSIC, N/A
Team Member
Mr Fernandez, José - Institute of Geosciences, CSIC, N/A
Mrs Abajo, Tamara - Institute of Geosciences, CSIC, N/a
SummaryOur main goal is develop and validate a new methodology for monitoring critical hydraulic infrastructures using A-DInSAR techniques (mainly dams and canals) by using data from last-generation satellites. In order to achieve this, we have selected two sites with different stability problems: Siles dam and Genil-Cabra Canal. These two sites have been selected according to the criteria of the Spanish Department of Agriculture and Enviroment “Ministerio de Agricultura, Alimentacion y Medio Ambiente (MAGRAMA)” officially responsible institution for monitoring these infrastructures. Siles Dam is located on the Guadalimar River, upstream of the Giribaile Reservoir, in the Natural Park of Sierras de Cazorla, Segura and Las Villas, in the Andalusian municipality of Siles (Province of Jaén), forming part also of Villaverde de Guadalimar, a municipality from Albacete. Siles dam, recently inaugurated, has shown stability problems and landslide risk caused by local geology. Because of this, the expected duration of the construction has been extended several times. The Genil-Cabra canal covers an irrigation zone between the populations of Puente Genil (Córdoba) and Écija (Sevilla), with a total length of 56 kilometers and covering an irrigation area of approximately 40.000 hectares. Its water comes from one of the biggest reservoir in Andalucía, the dam of Iznajar, and the construction of the canal took place between 1994 and 2003. Several slope-slides took place in the canal during its construction related to the local geology, nowadays several fractures can be observed, like the one at the kilometric point 0+300 (37.3767°, -4.7442°) caused by leaks of water from the canal. Our first objective will be to characterize these areas by using SAR data in order to detect significant signal over investigated areas, which can reflect stability problems in comparision with available geological data. After this task, we´ll fill a request for high resolution (Staring SpotLight and High Resolution SpotLight) Terrasar-X acquisitions. DInSAR data will be processed by using the SUBSIDENCE software, developed by the Remote Sensing Laboratory (RSLab) group from the Universitat Politècnica de Catalunya (UPC). SUBSIDENCE is a very mature software based on the use of Coherent Pixels Technique (CPT) algorithm (Mallorquí, Mora et al. 2003, Mora, Mallorqui et al. 2003, Blanco-Sanchez, Mallorquí et al. 2008). It is divided in two parts, PRISAR for interferograms generation and SUBSOFT for the calculation of linear and non-linear displacement rates. This software has been successfully used to study, the Conza dam in Italy, by using C-band data from Envisat satellite (Di Martire et al, 2014). In addition, a Multidimensional Small Baseline Subset (MSBAS) study will be performed by utilizing data acquired from all available satellite constellations. With this tool we expect to obtain temporal series of the ground displacement, a new kind of result that has never been done in the test sites of this project. We expect that the study of the selected sites and the techniques developed in this project will allow us to develop a new methodology in order to study critical hydraulic structures throught validation with geodetic data. Costs for the implementation of this methodology will be addressed as an important factor to choose this methodology. The funding for supporting the research, the cost of new satellite acquisitions as well as other monitoring tools, will be provided by two projects: mufSARem (RTC-2014-1922-5) (182.769,24 €) and AQUARISK (ESP2013-47780-C2-1,2-R) (209.330,00 €), both of them supported by the Spanish government through “Ministerio de Economía y Competitividad”.

Back to list of proposals

© DLR 2004-2016