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Summary of Proposal LAN0778

TitleMonitoring Ground Deformation Caused by Mining Activities with TerraSAR-X
Investigator Poenaru, Violeta Domnica - Romanian Space Agency, Space Applications
Team Member
PhD Dana, Iulia Florentina - Romanian Space Agency (ROSA), Space Applications
PhD Nedelcu, Ion - Romanian Space Agency (ROSA), Space Applications
SummaryThe proposal is regarding the implementation of a pilot project for monitoring the effects of mining activities on Ocnele Mari and the surroundings of the storage ponds for mining tailings: Valea Miresului; Valea Mealu; Valea Devei; Lunca Muresului; Herepeia; Teliuc (1, 2, 3); Valea Luponi. The project will assess the suitability for ground stability monitoring with TerraSAR-X for mining and urban areas nearby (Ocnele Mari, the storage ponds for mining tailings). Different areas are requested because of distinct characteristics; Ocnele Mari is very active, with surfacing groundwater and a difficult terrain. Also, subsidence is not constant; periods of relative stability are followed by quick deformation. Although the quick deformation cannot be properly monitored with InSAR, the periods of relative stability, characterized by millimeter level deformation can give us an estimate. This should be of great importance for predicting when and where the new subsidence process will occur in order to evacuate that area. The methods to be used are: InSAR - to create a DEM from a pair of data with large baseline and higher coherence. Differential InSAR - to create interferograms with deformation information. Stacking - reduce atmospheric distortions; multiple interferograms combinations and least squares estimation of deformation will be used in order to attenuate the atmospheric effects. Small baseline Stacking - create interferograms stacks with different maximum baselines and estimate if residual topographic errors are still a factor affecting the deformation maps. Eventually, Persistent Scatterers Analysis will be employed on spatially unwrapped interferograms (to avoid the use of temporal deformation models). The required data are stacks of Spotlight mode images. For each one of the two sites a minimum of 20 scenes is required in order to properly minimize atmospheric distortions and topographic errors. The funding of the project is supported by the Romanian Space Agency.(40x150 = 6000 euro).

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