Differential Interferometric Synthetic - Aperture Radar (DInSAR) for disused mine subsidence monitoring and detection

Benn, Joshua (2018) Differential Interferometric Synthetic - Aperture Radar (DInSAR) for disused mine subsidence monitoring and detection. [USQ Project]


Subsidence of the earth’s surface can result in significant structural damage and associated maintenance costs for infrastructure and developments. One major cause of subsidence is the collapse of abandoned mine workings. Monitoring of subsidence over large areas can be time consuming and expensive.

The earth’s surface is continually being observed by remote sensing satellites utilising Synthetic-Aperture Radar (SAR). SAR is a radar-based imaging technology that can be interrogated using interferometry to measure changes in the earth’s surface. This processing technique is known as Differential Interferometric Synthetic-Aperture Radar (DInSAR). The intention of this study was to investigate the potential of using DInSAR as a tool to detect and monitor large scale subsidence caused by disused and abandoned mines.

This paper used a significant subsidence event that occurred in the Newcastle region in 2012 which resulted in several properties subsequently demolished and rebuilt. Traditional monitoring data was used to validate any results achieved from DInSAR, and the objective was to determine the achievable accuracy and detection limits present in the DInSAR process.

The study found surprising results with correlation between the two sources. However, the objective of the project relied heavily on image availability. Interpretation and approximation of results to adjust for ground control points was another source of uncertainty around the achievable results. Mapping the extents of subsidence could be achieved more accurately by investigating relative changes in the unadjusted data to determine changes in the earth’s surface.

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Item Type: USQ Project
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: Campbell, Glenn
Qualification: Bachelor of Spatial Science (Honours) (Surveying)
Date Deposited: 31 Aug 2022 03:05
Last Modified: 27 Jun 2023 04:46
Uncontrolled Keywords: abandoned mine; Differential Interferometric Synthetic-Aperture Radar (DInSAR); subsidence
URI: https://sear.unisq.edu.au/id/eprint/40712

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