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Sediment fluidization events in a lake caused by large monthly rainfalls
Author(s) -
Colomer Jordi,
Serra Teresa,
Soler Marianna,
Casamitjana Xavier
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl014299
Subject(s) - fluidization , sediment , precipitation , geology , hydrology (agriculture) , structural basin , karst , environmental science , water column , particle (ecology) , geomorphology , oceanography , geotechnical engineering , fluidized bed , meteorology , engineering , waste management , paleontology , physics
In the last fourteen years (1986–1999), fluidizations of confined bed–sediments due to underground springs in basin BII of lake Banyoles (Spain) have been detected. As a result of periods of high precipitation, sediment confined at the bottom of karstic basins migrates from 45 m depth to approximately 25 m depth. Fluidization processes are associated to monthly rainfall 1.5 to 4.5 times larger than the long‐term mean (1970–1999). As a result of a fluidization event, the water column of the lake maintains the particle volume concentrations of suspended sediment (pVC) as high as 44 μl/l, which is ∼8–29 times larger than the usual values of pVC.
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