08 Nov 2022
08 Nov 2022
Status: this preprint is currently under review for the journal NHESS.

Brief communication: Landslides on the Argentinian Santa Cruz river mega dam works revealed by PSI DInSAR

Guillermo Tamburini-Beliveau1, Sebastián Balbarani2, and Oriol Monserrat3 Guillermo Tamburini-Beliveau et al.
  • 1Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) - Centro de Investigaciones y Transferencia (CIT) de Santa Cruz. Av. Lisandro de la Torre 860, Río Gallegos, Argentina
  • 2Departamento de Agrimensura, Facultad de Ingeniería, Universidad de Buenos Aires y Facultad de Ingeniería del Ejército, Universidad de la Defensa Nacional, Ciudad Autónoma de Buenos Aires, Argentina
  • 3Geomatics Research Unit, Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Av. Gauss, 7, E-08860 Castelldefels (Barcelona), Spain

Abstract. In the dam industry, safety and environmental aspects are crucial beyond production goals. By monitoring landslides associated with the construction of a hydro-power dam in the Santa Cruz River in the Argentine Patagonia, this paper contributes to the assessment of the project safety. Ground deformation is monitored using SAR satellite data and the Persistent Scatterer Interferometry technique, and contrasted with optical imagery, geological and technical reports and fieldwork. The results include maps of accumulated deformation and deformation time series for the locations of the anchorages of the dam, providing a new and independent dataset to assess the dam work integrity.

Guillermo Tamburini-Beliveau et al.

Status: open (until 21 Dec 2022)

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Guillermo Tamburini-Beliveau et al.

Guillermo Tamburini-Beliveau et al.


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Short summary
The Santa Cruz river flows from the Andes to the Atlantic, crossing the gorgeous Patagonian steppe. There, two mega hydroelectric dams are being built and once completed the 50 % of the river's course will be flooded. It is located in such a remote area that it remains unknown even to the argentines. Structural problems emerged during the dam’s construction and using remote sensing techniques we have been able to identify them, landslides affecting the dam’s wall anchorages locations.