Land subsidence in Mexico City is estimated to be more than 9 meters over the last century, resulting in damages to buildings, streets, sidewalks, sewers, storm water drains and other infrastructure. As the city is partially built on the site of a former lake, it rests on heavily saturated clay, which is collapsing due to the over-extraction of groundwater.

SAR interferometry (InSAR) is an effective method that allows monitoring ground displacement over large areas, giving us insight to the spatial distribution of the subsidence rates. Previous InSAR studies using ERS data showed a maximum subsidence rate larger than 30 cm/year in some parts of Mexico City, whereas current subsidence rates derived from Sentinel-1 images approximate 2.5 cm/month.

In this webinar, you will learn how to use SAR interferometry to identify and map land subsidence using the ESA SNAP Sentinel-1 Toolbox. We will show you how to access the RUS Service and how to download, process, analyse and visualize the free data acquired by the Copernicus satellites.

You can replay this webinar through our RUS Copernicus Training channel available on Youtube (duration: 1 hour).

You can also retrieve the corresponding training support in the Train with RUS section of the RUS portal.

RUS Webinar – Land subsidence mapping with Sentinel-1 – 14 June 2018