The Record of an Extreme Flood in the Sediments of Montane Lillooet Lake, British Columbia: Implications for Paleoenvironmental Assessment |
| |
| Authors: | Robert Gilbert Sarah Crookshanks Kyle R Hodder John Spagnol Roland B Stull |
| |
| Institution: | (1) Department of Geography, Queen’s University, Kingston, ON, K7L 3N6, Canada;(2) Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada |
| |
| Abstract: | Severe rainfall in mid October, 2003 produced the largest floods in almost a century of record on rivers in the Cordillera
of southwestern British Columbia. Sediment deposited in Lillooet Lake as a result of this event is clearly distinguished by
stratigraphy, colour, texture, magnetic properties, and organic content. Each of these physical properties is related to the
lacustrine processes, especially turbid underflow, that distributed the sediment through the lake. The flood, which lasted
less than a week, delivered 8–12 times the amount of sediment that accumulates in most entire years in the deepest, central
parts of the lake. Recognition of events of this type in the stratigraphic record offers a means of assessing the changing
nature of extreme hydroclimatic events, and their relation to more ubiquitous, lower-energy processes. |
| |
| Keywords: | British Columbia Floods Glacial lakes Sedimentation Sediment supply Varves Turbidity currents |
| 本文献已被 SpringerLink 等数据库收录！ |
|
