22-27 September 2019
Trade Fairs and Congress Center (FYCMA)
Europe/Madrid timezone

REMOTE SENSING FOR SUBSIDENCE ANALYSIS DUE TO GROUNDWATER USE IN THE BOGOTA PLAIN, COLOMBIA

27 Sep 2019, 12:15
15m
Multiuse room 2 ()

Multiuse room 2

Oral Topic 9 - Groundwater and socio-economic development in Latin-America Parallel

Speaker

Prof. Carlos Molano (Los Andes University)

Description

Groundwater depletion is a subject of high concern that is not only being caused by pumping, but also due to climate change, population growth and contamination of water sources. In this paper, we present the simulated subsidence in the Funza-Madrid sector by pumping, draining in Bogota city, and also the subsidence calculated with the use of remote sensors (Sentinel and Grace) for a period between the beginning of 2015 and mid-2016. With remote sensing, a total subsidence of 2 cm (0.12 cm / month) was calculated. This is associated with a total drawdown of 34 m (1.62 m / month) where the most relevant one occurred between September 2015 and January 2016 (2 cm / month). A correlation between precipitation series and the drawdowns was found, where the low precipitation values triggered significant water levels decreasing. The highest values of subsidence and drawdowns occurred in the southwestern zone of the plain (Sibate, Funza, Mosquera, Soacha, among other localities) which can be attributed to the strong El Niño weather event that occurred between 2015 and 2016. It is concluded that the estimated subsidence is due to the levels decreasing as a result of groundwater use in the Bogota plain.

Primary authors

Mr Jose Villegas Prof. Carlos Molano (Los Andes University) Prof. Jillian Pearse (Los Andes University)

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