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TitleHistorical fluctuations of lake shorelines based on geomorphological analysis in the vicinity of Rankin Inlet, Nunavut
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AuthorBellehumeur-Génier, O; Oldenborger, G A; LeBlanc, A -M
SourceGeological Survey of Canada, Open File 8224, 2017, 27 pages, https://doi.org/10.4095/301750
Year2017
PublisherNatural Resources Canada
Documentopen file
Lang.English
Mediaon-line; digital
File formatreadme
File formatpdf; rtf; docx; xlsx
ProvinceNunavut
NTS55K/16
AreaRankin Inlet; Kivalliq Region
Lat/Long WENS -92.4000 -92.0000 62.9514 62.8472
Subjectsenvironmental geology; surficial geology/geomorphology; Recent; environmental impacts; environmental studies; environmental analysis; climate; climate effects; climate, arctic; surface waters; lakes; shoreline changes; morphology; drainage; permafrost; thermokarst; ground ice; massive ice; temperature; slumps; ice wedges; remote sensing; satellite imagery; airphoto interpretation; glacial deposits; tills; moraines; hummocks; glaciofluvial deposits; ice contact deposits; marine deposits; beach deposits; deltaic deposits; intertidal deposits; alluvial deposits; outwash fans; organic deposits; climate change; climate change resilience planning; infrastructures; thermokarst potential; thermokarst processes; active layer; geographic information systems (GIS); nearshore deposits; Phanerozoic; Cenozoic; Quaternary
Illustrationslocation maps; aerial photographs; tables; histograms
Viewing
Location
 
Natural Resources Canada Library - Ottawa (Earth Sciences)
 
ProgramPermafrost, Climate Change Geoscience
LinksErratum
Released2017 06 30; 2017 12 22
AbstractThe purpose of this Open File is to provide information derived from the analysis of lake shorelines in the vicinity of Rankin Inlet, Nunavut. The analysis focused on three areas of interest located north of Rankin Inlet, with different surficial material mosaics. A total of 220 lakes were digitized from air photos and satellite imagery using a geographical information system (GIS) for the period 1954 to 2014. Lake surface areas were computed using the digitized polygons. A visual assessment of the geomorphological dynamics of individual lakes was undertaken to differentiate normal shoreline behavior from that potentially associated with thermokarst. Results showed that lakes in the areas of interest have experienced significant shoreline fluctuation as part of normal lake behavior. Despite the high degree of normal shoreline variability, the geomorphological analysis revealed that certain lakes demonstrated abnormal increases or decreases in area, along with localized shoreline dynamics.
Summary(Plain Language Summary, not published)
The purpose of this Open File is to deliver information derived from the analysis of lake shorelines in the vicinity of Rankin Inlet, Nunavut. The analysis covers three areas of interest located north of Rankin Inlet, over different surficial material mosaics. A total of 220 lakes were digitized on a collection of air photos and satellite imagery in a geographical information system (GIS) for the period 1954 to 2014. Assessment of the dynamics of each individual lake was undertaken in order to differentiate normal shoreline behavior from potential abnormal processes. Results have shown that lakes in the areas of interest have experienced significant shoreline fluctuation as part of normal lake behavior. Analysis reveals that certain lakes demonstrate abnormal increases or decreases in area, along with localized shoreline dynamics best explained by permafrost degradation.
GEOSCAN ID301750