| Title | Les archives paléo-hydrologiques de Grand Lake, Labrador |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Fortin, D; Francus, P |
| Source | Utilisation des archives naturelles pour la reconstitution du passé hydro-climatique; by Bégin, C; Nicault, A; Bégin, Y; Geological Survey of Canada, Open File 8768, 2021 p. 188-193, https://doi.org/10.4095/328093  Open Access |
| Year | 2021 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | French |
| Media | on-line; digital |
| Related | This publication is contained in Utilisation des archives
naturelles pour la reconstitution du passé hydro-climatique |
| File format | pdf |
| Province | Newfoundland and Labrador |
| NTS | 13F/07; 13F/08; 13F/09; 13F/10 |
| Area | Grand Lake; Labrador; Sheshatshiu; North West River |
| Lat/Long WENS | -61.0000 -60.0000 53.7500 53.2500 |
| Subjects | environmental geology; hydrogeology; surficial geology/geomorphology; stratigraphy; Nature and Environment; Science and Technology; surface waters; lakes; lake sediment cores; lake sediment thickness;
varves; laminations; climatology; paleoclimatology; hydrologic environment; runoff; paleoenvironment; floods; snow; Le projet ARCHIVES; lacustrine sediments; Climate change; Hydrology; Boreal ecosystems; Forests; Trees; Phanerozoic; Cenozoic;
Quaternary |
| Illustrations | photographs; time series |
| Program | Climate
Change Geoscience Extreme Events |
| Released | 2021 06 28 |
| Abstract | Sediments accumulated at the bottom of Grand Lake, located near the communities of North West River and the Innu First Nation of Sheshatshiu, Labrador, constitute an exceptional paleo-environmental
archive. Their thin annual layers (varves) were analyzed in a manner similar to the annual growth rings of trees. The varves are formed due to the great depth of the lake (> 200 meters) and the large quantity of fine particles carried by its main
tributary during flood periods. Analysis of sediments collected from various locations on the lake-bottom indicates that the varve thickness has declined over the past 150 years and that the interannual variability of floods has also decreased
considerably during this period. We attribute these changes to a decrease in snow cover and in the intensity of the spring melt during the study period. |
| Summary | (Plain Language Summary, not published)
The main objective of the ARCHIVES project was to develop a new methodological approach aiming at reconstituting the long-term natural variability of
hydro-climatic parameters used in the modeling of water inflows in basins of interest for hydroelectric production in Quebec. At the end of the project, hydropower resource managers and authorities concerned about climate change can benefit from a
better understanding of the evolution in time and space of hydro-climatic conditions that will facilitate the development of appropriate hydrological scenarios for this region that is sensitive in many ways to climate change. This document presents a
synthesis of the results produced by the multidisciplinary team of this five-year project, which took place over the entire boreal zone of Quebec and part of Labrador. This synthesis is structured in 21 chapters grouped in three distinct parts. The
first part is divided into five chapters presenting fundamental concepts and prerequisites for reading the other sections of the document. The second part, which includes seven chapters, presents the treatment and meaning of the indicators used in
the project. Finally, the nine chapters of the third part of the document present a retrospective analysis of the hydro-climate over the last centuries, or even millennia depending on the indicators. |
| GEOSCAN ID | 328093 |
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