Measurement of vertical deformation in Karachi using multi-temporal InSAR

Shamsa Kanwal, Xiaoli Ding, Lei Zhang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)


Karachi is located on southernmost border of Pakistan along the Arabian Sea coast. Concerned institutions fear the occurrence of subsidence in the city, further contributing to the relative sea level rise. No direct measurement has been made so far about the subsidence rate and its contribution to city's submergence risk. Our study presents first and preliminary results of vertical ground deformation measurement over this area using an advanced Temporarily Coherent Point InSAR technique using Envisat/ASAR and Sentinel-1A data. These datasets allowed us to study deformation in this area from 2004-2016, with some data gaps, thus providing a long-term analysis. Results show that various parts of the city are unstable and undergoing deformation of up to about 15 mm/yr. However, we could not find significant correlation between faults passing through the city and the deformation in its different parts. Future studies should focus on monitoring the deformation on a regular basis.

Original languageEnglish
Title of host publication2018 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781538671504
Publication statusPublished - 31 Oct 2018
Event38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018 - Valencia, Spain
Duration: 22 Jul 201827 Jul 2018

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)


Conference38th Annual IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2018


  • Interferometry
  • Multi-temporal
  • Subsidence
  • Synthetic aperture radar (SAR)

ASJC Scopus subject areas

  • Computer Science Applications
  • Earth and Planetary Sciences(all)

Cite this