CGRG Bibliography of Canadian Geomorphology
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Author : Hakanson, L
Date : 1981
Title : On lake bottom dynamics
Publication : Canadian Journal of Earth Sciences
Issue : 18(5):
Page(s) : 899-909
Abstract
It is suggested that the areal distribution of erosion and transportation (Ae+t) or accumulation (Aa + 100 - Ae+t) at the bottom of lakes is governed by: (1) an energy factor, E = [(A^0.5/Dmax) - 0.2], where a is the lake area (km^2), Dmax is the maximum depth (m); (2) a slope factor, S = log (60.6D/A^0.5), where D is the mean depth (m); and (3) a form factor, Vd^-1 = Dmax/3D. This relationship may be given as: Ae+t = 52.0et +19.3 where et is the energy-topography factor; or Ae=t = 100 - Aa = 52.0 [A^0.5/Dmax -0.2] x Dmax/3D log (60.6D/A^0.5) +19.3 This relationship is important since it provides a means by which to determine the percentage of a given lake area that is dominated by erosion and transportation processes (Ae+t) or accumulation processes (Aa) from only three morphometric standard parameters: lake area (A), mean depth (D), and maximum depth (Dmax). The relationship may also be used as a tool to gain better insight into the difficult problem of distinguishing between net and total deposition, i.e., the resuspension in a lake depends on the energy, slope, and form factors. Despite the fact that the et formula is based on only three standard parameters it yields a surprisingly high correlation with Ae+t, r=0.93, which strongly indicates that it describes the functional relationships in a proper manner. The supporting data for this paper are from a study of nine Swedish lakes.
Bibliography of Canadian Geomorphology