Imprints of large-scale oscillations on river flow in selected Canadian river catchments
- 1York University, Faculty of Environmental and Urban Change, Canada (olusolaadeyemi.ao@gmail.com)
- 2Federal University of Technology, Akure, Nigeria (stogunjo@futa.edu.ng)
- 3WASCAL, DRP-WACS, Federal University of Technology Akure, Ondo State, Nigeria
- 4Faculty of Physics, University of Warsaw, Warsaw, Poland
Rivers within sub-tropical and temperate regions serve several purposes, including agricultural irrigation, hydro-power generation, and drivers of civilization. The impacts of six large-scale oscillation indices on river flow at three stations within Humber catchments (Ontario and Labrador) between 1970 and 2020 were investigated using sensitivity and wavelet analyses. Results showed that the discharge at East Humber River near Pine has the highest statistically significant sensitivity of 0.304 and 0.394 units per month to the Dipole Mode Index (DMI) and Tropical North Atlantic (TNA), respectively. Monthly significance analysis also showed the varied influence of large-scale oscillations on the river flow at these locations. Wavelet analysis reveals significant active multidecadal oscillations for the North Atlantic Oscillation (NAO) at East Humber River near Pine with high spectral power. This study has identified the contributions of different climatic indices to river flow within the Humber catchments. The results will be helpful in environmental planning and effective water management within the basin.
How to cite: Olusola, A., Ogunjo, S., and Olusegun, C.: Imprints of large-scale oscillations on river flow in selected Canadian river catchments, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-1104, https://doi.org/10.5194/egusphere-egu23-1104, 2023.
