| Title | Reconstitution des apports en eau des deux derniers siècles : approche méthodologique. Application au réservoir Caniapiscau (Complexe La Grande, Québec) |
| Download | Download (whole publication) |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Nicault, A; Boucher, É; Guiot, J; Bégin, Y |
| 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. 152-161, https://doi.org/10.4095/328086  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 | Quebec; Newfoundland and Labrador |
| NTS | 13E; 13L; 13M; 23; 33A; 33B; 33G; 33H; 33I; 33J; 33O; 33P |
| Area | Complexe La Grande; Réservoir Caniapiscau; Lac Nitchequon |
| Lat/Long WENS | -75.0000 -62.0000 56.0000 53.0000 |
| Subjects | environmental geology; hydrogeology; geochemistry; Nature and Environment; Science and Technology; Economics and Industry; Recent; climatology; paleoclimatology; hydrologic environment; hydrologic
budget; watersheds; dendrochronology; stable isotope studies; carbon isotopes; oxygen isotopes; paleoenvironment; statistical analyses; correlations; densities; energy resources; hydroelectric power; Le projet ARCHIVES; North Atlantic Oscillation;
Arctic Oscillation; Picea mariana; Climate change; Hydrology; Boreal ecosystems; Forests; Biology; Trees; Water supply; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | location maps; flow diagrams; time series; plots |
| Program | Climate
Change Geoscience Extreme Events |
| Released | 2021 06 28 |
| Abstract | The objective of this study was to reconstruct 200 years of spring (Qspr), summer (Qsum) and annual (Qann) water supply variability at the Caniapiscau Reservoir in the remote area of northern Quebec.
This key area for hydropower production lacks long-term hydrological records, and tree-ring proxies are thought to be the best substitute for extending the instrumental climatic records. Tree-ring widths, ring densities and stable isotope ratios
(delta-13C and delta-18O) were used to perform paleohydrological reconstructions. The following reconstruction techniques were evaluated for each variable reconstructed: partial least square (PLS) regression applied to all of the tree-ring series,
PLS regression applied to selected tree-ring series, and the best analogue method (BAM) applied to selected tree-ring series. These three reconstructions were then combined into a composite reconstruction. Reconstruction verification shows that the
annual and summer water supply reconstruction quality is good, while the verification tests disqualified our spring water supply reconstruction. The reconstructed long-term water supply variations over the past two centuries are dominated by decadal
to sub-decadal fluctuations, and also show that there are distinct long hydrological periods during which water supplies change in intensity and variability. Annual water supplies (Qann) inversely correlate with both winter and summer North Atlantic
Oscillation (NAO) indices. Arctic oscillation (AO) indices also influence Qann to a greater degree than NAO indices. Summer water supplies inversely correlate only with AO and NAO summer indices. |
| GEOSCAN ID | 328086 |
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