Abstract
A 2-year study of sedimentation in Lake Biel reveals that three major factors can account for the spatial and temporal patterns of tripton sedimentation. Allochthonous inputs of particulate matter mostly derived from the Aare river during spring snowmelt and other high-water periods, provide about 50% of the carbonate and 50% of the siliceous matter collected in sediment traps. Phytoplankton activity in this eutrophic, hard-water lake accounts for the rest of the carbonate and siliceous matter, the latter being mostly diatom frustules. Sedimentation rates are thus highest during periods of maximum river flooding, maximum phytoplankton activity and following the breakdown of the thermocline, at which time trapped particles settle out. Resuspension of sediment is important in at least one basin. Resolution of carbonate appears to be minor.
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Wright, R.F., Matter, A., Schweingruber, M. et al. Sedimentation in Lake Biel, an eutrophic, hard-water lake in northwestern Switzerland. Schweiz. Z. Hydrologie 42, 101–126 (1980). https://doi.org/10.1007/BF02502430
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DOI: https://doi.org/10.1007/BF02502430