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Temporal and Spatial Representativeness of Alpine Sediment Yields: Cascade Mountains, British Columbia
Author(s) -
Evans Martin
Publication year - 1997
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/(sici)1096-9837(199703)22:3<287::aid-esp757>3.0.co;2-v
Subject(s) - cirque , representativeness heuristic , sediment , physical geography , geology , hydrology (agriculture) , lithology , structural basin , spatial variability , climate change , glacier , geomorphology , geography , oceanography , psychology , social psychology , geotechnical engineering , paleontology , statistics , mathematics
New alpine, lake‐based sediment yield data are presented from a cirque basin in the alpine zone of the Cascade Mountains, British Columbia. Average rates of sediment deposition in Glacier Lake from a 1·33 km 2 basin where 7 ta −1 ( BP ) 10 300–6845 BP , 8 ta −1 ( BP ) 6845–3390 BP and 9·8 ta −1 ( BP ) 3390 BP to the present. The potential representativeness of the site is carefully assessed on the basis of three major axes of variability: lithology, climate and relief. Slope frequency data suggest the site is representative of the cirque component of the landscape but not of the whole alpine zone. The results emphasize the importance of considering the spatial variability of relief and the temporal variability of climate in assessing the representativeness of sediment yield data. © 1997 by John Wiley & Sons, Ltd.