Metodología para el monitoreo de la subsidencia del suelo en la ciudad de Bogotá D.C con técnicas de interferometría y persistent scatterers

Abstract

The subsidence phenomenon is a vertical movement of the Earth's surface, triggered by several factors, such as fluid extraction, ground compaction, mineral exploitation, reservoir exploitation, etc. This phenomenon has been occurring in countries such as Spain, the United States, Italy, Mexico, China, and Colombia, causing ground fractures and damage to urban infrastructure, as well as environmental, social, and economic repercussions. In the city of Bogotá, subsidence has been demonstrated for the period between 2006 and 2008, evidencing deformations and subsidence of up to 7.5 cm/year. The localities of Puente Aranda, Engativá, Teusaquillo, and Fontibón were the most affected (Blanco, Barreto, & Dulfay, 2009). These studies have been carried out using differential interferometry. This technique allows deformations to be detected between two image capture moments, but the capital district does not have tools or algorithms that capture time trends for continuous monitoring (Bogotá, 2016). Given that subsidence studies have been conducted in the city of Bogotá in recent years, revealing a strong subsidence trend in some areas of the city, the need arose to implement one of the most recent methods in the world that considers time series interferometry, called Persistent Scatteres, which allows continuous monitoring of surface deformation. This project seeks to conduct the first Persistent Scatteres tests in the city of Bogotá to enable viable methodological alternatives for monitoring subsidence in the city of Bogotá using open-source data.