The Record of an Extreme Flood in the Sediments of Montane Lillooet Lake, British Columbia: Implications for Paleoenvironmental Assessment

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, a...

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Bibliographic Details
Published in:Journal of paleolimnology 2006-05, Vol.35 (4), p.737-745
Main Authors: Gilbert, Robert, Crookshanks, Sarah, Hodder, Kyle R, Spagnol, John, Stull, Roland B
Format: Article
Language:English
Subjects:
Floods
Lakes
Magnetic properties
Physical properties
Sediments
Stratigraphy
Underflow
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Summary: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.[PUBLICATION ABSTRACT]
ISSN:0921-2728
1573-0417
DOI:10.1007/s10933-005-5152-8