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TitleMulti-temporal SAR observations of the Surat Basin in Australia for deformation scenario evaluation associated with man-made interactions
AuthorMoghaddam, N F; Samsonov, S VORCID logo; Rudiger, C; Walker, J P; Hall, W D M
SourceEnvironmental Earth Sciences vol. 75, no. 282, 2016, 16 pages,
Alt SeriesNatural Resources Canada, Contribution Series 20170206
PublisherSpringer Nature
Mediapaper; on-line; digital
File formatpdf
AreaSurat Basin; Australia
Lat/Long WENS-150.0000 151.2500 -26.2500 -27.5000
Subjectsremote sensing; deformation; radar imagery; radar methods; modelling; coal mining; coal seams; coal fields; groundwater movement; groundwater circulation; mining activities; PSInSARTM; SBAS approach
Illustrationssatellite images; location maps; tables; graphs; plots; histograms
Released2016 02 09
AbstractHuman activities for extracting natural resources, may lead to subsequent gradual or abrupt surface deformation, with adverse effects in the local ecosystem and damage to man-made structures. Over the past two decades, interferometric SAR (InSAR) has been demonstrated as the optimal remote sensing technique to estimate surface deformation with high spatial coverage and vertical
accuracy over traditional surveying methods. In this paper, the outcome of advanced differential InSAR processing to detect and analyze ground surface behavior due to manmade interactions are presented. An improvement was achieved in the temporal resolution and accuracy using a unique combination of both C-band and L-band SAR satellite acquisitions with different temporal and spatial baselines. The two alternate DInSAR methodologies were applied on the northeastern part of the Surat Basin, Australia for an area without long-term ground-based geodetic observations. The regions undergoing downward motion are located above coal seam gas (CSG) mining sites with rates up to 28 mm/year. Three scenarios were identified: (1) extensive groundwater extraction from shallow aquifers due to CSG mining, (2) CSG mining without direct impact on groundwater resources and (3) patchy uplift over an industrial forest adjacent to a CSG mining district. Contrary to a previous study conducted in this region using the PSInSARTM technique which reported stability of the
area with insignificant surface deformation, this study shows that there are considerable deformation signals consistent with resource extraction. Consequently, it is shown that the SBAS approach is superior to PSInSARTM for deformation monitoring with focusing on naturally distributed scatterers.

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