ID 28768
Title Subsidence Monitoring in Ebro River Delta
Type Restrained Dataset
Class Peer Review
Cost Free of Charge/Reproduction costs
Primary Application Domain Hazards
Secondary Application Domain Coastal Zones
Location Europe
Status accepted
 
Principal Investigator
 
Last name (Family name) Pipia
Name (Given name) Luca
Title Dr.
Institution Instituto Cartografic de Catalunya
Address Parc de Montjuic s/n
Town Barcelona
Postal Code 08038
Country SPAIN
Phone +34 935671500
Fax +34 935671515
Email Address luca.pipia@icgc.cat
 
Co - Investigators

Co - Investigators
Mr./Mrs./Ms. Fernando Perez
Institut Cartografic i Geologic de Catalunya
fernando.perez@icgc.cat
 
Team Composition, Experience, Innovation and Contribution
 
Team Luca Pipia: PI, Electrical Engineering, expert in subsidence phenomena estimation through differential SAR Interferometry and SAR Polarimetry.

Fernando Perez : Physicist (UB), expert in geometric modelling and Synthetic Aperture Radar data processing
Experience Recently authored papers on the use of SAR polarimetry to characterize the scatterers short and long time behaviour in urban environment [Pipia et al., Trans on Geosc. And Rem.Sensing, Vol. 51. Issue 4, April 2013] and on benefits of polarimetric information to improve deformation map retrieval [Pipia et al., IEEE Geosc. And Rem. Sens. Letters, Vol.6, Issue 1, January 2009]. Pipia participated in several DInSAR project carried out by the Cartographic and Geological Institute of Catalunya (ICGC) for the characterization of surface deformation process over areas involved in mining activities (Catalonia), oil extraction (Venezuela), water pumping (Colombia), etc. Pipia is currently co-I on the already approved Spanish Life Project (LIFE13 ENV/ES/001182 - B1) titled “Proyecto piloto de medidas de adaptación y mitigación al cambio climático en el Delta del Ebro” (Pilot project on measures of climate change adaptation and mitigation in Ebro River delta). The project gathers a large group with DInSAR expertise and subsidence geological interpretation at ICGC, competitiveness and sustainable development at Institut de Recerca i Tecnologia Agroalimentaries (IRTA), hydrological resources management at Agencia Catalana de l’Aigua (ACA), environmental protection and sustainability at Consorci Concesionari d’Aigües per als ajuntaments i Indústries de Tarragona (CAT), climate change mitication strategies at Oficina Catalana del Canvi Climatic (OCCC), and fluvial Dynamics and hydrology at Universidad de Cordoba (UCO).
Innovation The Ebro-ADMICLIM project (LIFE13 ENV/ES/001182 - B1) deals with pilot actions focused on the adaptation and mitigation to climate change in Ebro river delta (Catalonia, Spain), which represents an area particularly vulnerable to rising sea levels and the area subsidence. The project’s main goal is to work out an integrated approach to deal with water management, sediment and habitat arises (paddy fields and wetlands), reduce coastal erosion, increasing accumulation (sequestration) of carbon in the soil, reduce emissions of greenhouse gases (GHG) emissions and improve water quality. This type of approach is not has been applied so far in the European Union is clearly innovative and internationally.
To this end, the collection of ERS images (1992-2000) and ENVISAT images (2003-2010) over the Ebro river delta is expected to provide a valuable description of the subsidence phenomena rates affecting the whole area of interest using Differential SAR Interferometry (DInSAR) techniques.
Contribution  
 
 
Executive Summary
 
Executive Summary The Ebro-ADMICLIM project (LIFE13 ENV/ES/001182 - B1) deals with pilot actions focused on the adaptation and mitigation to climate change in Ebro river delta (Catalonia, Spain), which represents an area particularly vulnerable to rising sea levels and the area subsidence. The project’s main goal is to work out an integrated approach to deal with water management, sediment and habitat arises (paddy fields and wetlands), reduce coastal erosion, increasing accumulation (sequestration) of carbon in the soil, reduce emissions of greenhouse gases (GHG) emissions and improve water quality. In other words, the idea is to jointly manage the contributions of inorganic matter (sediment) and organic (plant matter) soil, with the aim to optimize the processes of vertical accretion (soil formation) and decomposition of matter organic (GHG) in the rice fields and constructed wetlands. This type of approach is not has been applied so far in the European Union is clearly innovative and internationally.
Deltaic areas are general affected by subsidence phenomena due to the geological process of sediment accumulation and subsequent compaction by modifying naturally and consistently ground elevation terrain (Allen and Allen, 2005). The natural rate of accumulation-compaction is one of the influencing factors, along with the coastal dynamics and changes in sea level, in the preservation, increase or decrease in the surface area of the delta plain (Jouet et al , 2008) and the subsequent change of the chemical in the soil and aquifers. Given that one of the main objectives of the project is preserving the height of the terrain in the delta plain by controlling the vertical accretion rates, it is crucial to know the extent and the rate of subsidence to identify areas that need further or less controlled sediment deposition. To this end, the collection of ERS images (1992-2000) and ENVISAT images (2003-2010) over the Ebro river delta is expected to provide a valuable description of the subsidence phenomena rates affecting the whole area of interest using Differential SAR Interferometry (DInSAR) techniques.
Differential radar interferometry (DInSAR) is a consolidated technique able to describe ground motions with sub-centimeter precisions of a few to hundreds of square kilometers is proposed technique (Berardino et al., 2002). It is well known that the measuring point density depends on the spatial resolution of the images used, the working frequency band signal and the temporal stability of the radar reflectivity. The study here proposed deals with the detection of the deformation trends within the deltaic area using coherence-based DInSAR approach. The ICGC already has at disposal a collection of ERS + ENVISAT ASAR images over the Delta composed of the following stacks:
A015-0819 11 ERS1/2 + 21 ENVI
D194-2781 12 ERS1/2 + 20 ENVI
D423-2781 20 ERS1/2 + 22 ENVI
In order to increase the number of time samples, and hence the accuracy of the final deformation map retrieval, it is key to gather all the ERS/ENVISAT images at disposal from the ESA catalogue. In addition, a new ascendent stack (A287) can be gathered in order to assess as accurately as possible any horizontal movement in the E-W direction. Moreover, a PALSAR FBS+FBD stack seems to be available (A663-800) that could extend the number of measured points thanks to L-band characteristics.
Finally, the retrospective SAR-based description of the subsidence processes within Ebro river delta will be used to define the location of 15 corner reflectors that will be sensed by Sentinel1 SAR sensor. The main purpose is to strategically select their position to tie the deformation information provided by high-coherence isolated areas and generate a more reliable absolute deformation map of the whole delta.
 
 
Schedule
 
Schedule This project will be composed of six main phases.
1 Acquisition and quality control of three stacks of SAR images: ENVISAT, ERS and ALOS SAR.
2 For each stack, selecting master image (reference image) and coregistering the other images of the stack to master
3 For each coregistered stack, synthesis of the topographic component based on a DEM quality.
4 For each coregistered stack, generation and filtering of differential interferograms and coherence images of lines according to criteria of space-based and temporal decorrelation that optimize the whole.
5 For each coregistered stack, applying a coherence-based advance DInSAR technique :
5.1generating a map of average consistency and density of useful points,
5.2 Triangulation of the selected points
5.3 Establishment of a linear deformation model
5.4 Fixing a stable known point or reference strain.
5.5 Integration of the results on the triangulated network and calculation of absolute values of strain rate and error terms due to inaccuracies in the DEM
5.6 Calculation of model residuals and obtain the terms of nonlinear deformation
5.7 Filtering atmospheric effects
5.8 Calculation of temporal deformation history for each point in the network useful.

6 Generation of deformation rate maps and a database containing reliable pixel absolute deformation time evolution
 

Total number of reports/results presented by the project: 1

Related Public Accepted Reports / Results

Progress Report

03/2016

Status
true
Achievements
A report has been completed with absolute deformation and mean velocities for the studied period. This report will be available in the frame of the EBRO-ADMICLIM LIFE project
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