| Title | Seasonal surface displacement derived from DInSAR, Rankin Inlet, Nunavut |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Short, N ;
LeBlanc, A -M; Bellehumeur-Génier, O |
| Source | Geological Survey of Canada, Canadian Geoscience Map 291, 2016, 1 sheet, https://doi.org/10.4095/298815  Open Access |
| Image |  |
| Year | 2016 |
| Publisher | Natural Resources Canada |
| Edition | prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | surficial geology, sediment displacement, 1:35,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 15 (NAD83) |
| Media | on-line; digital |
| File format | readme
|
| File format | pdf; rtf; shp; xml; jpg; xls |
| Province | Nunavut |
| NTS | 55K/16 |
| Area | Rankin Inlet |
| Lat/Long WENS | -92.4667 -92.0500 62.9000 62.7833 |
| Subjects | surficial geology/geomorphology; engineering geology; Nature and Environment; displacement; sediment transport; glacial features; glacial deposits; Cenozoic; Quaternary |
| Illustrations | aerial photographs |
| Program | Climate Change Geoscience Land-based Infrastructure |
| Released | 2016 07 06 |
| Abstract | This map shows the relative ground surface displacement between the major terrain units during one summer in the area of Rankin Inlet. The ground displacement was derived using differential
interferometric synthetic aperture radar (DInSAR) data for the summer of 2015. DInSAR data came from the Canadian RADARSAT-2 satellite which operates with a C-band SAR. Stable ground represents locations where either no vertical change was calculated
or where displacement was within the expected range of error (± 1.0 cm). Downward displacement represents, in general, ground surface lowering (subsidence) on the order of 1.0 to 2.5, 2.5 to 4.0, 4.0 to 6.0, 6.0 to 8.5, and 8.5 to 14.0 cm. Other
possible causes of apparent downward displacement could be associated with downward surface water table movement throughout the summer and sediment erosion. Upward displacement represents a surface rise of 1.0 to 5 cm, which is only 0.3% of the total
coverage of the DInSAR map. Areas of no data result from a loss of interferometric coherence. These are typically water and other relatively smooth surfaces from which there is no radar return, or where there has been significant ground surface
disturbance and the radar returns cannot be correlated. |
| Summary | (Plain Language Summary, not published)
This map shows the seasonal displacement of the ground derived from satellite interferometric radar, in the area of Rankin Inlet, Nunavut. The map shows
the relationship between the surficial geology units and the stability of the terrain. The hamlet and the airport are examined in detail and the stabilizing effects of engineering strategies can be seen. The map provides guidance for infrastructure
managers on areas that are less stable and may need remedial measures, and is a valuable tool in planning new infrastructure investment and construction. |
| GEOSCAN ID | 298815 |
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