LAKE SIGNELL CASE

Lake Signell Sediment Test Case

This case provides a fundamental check of the ability of a model to represent 1) wind driven transport in a closed basin, 2) wave-current influences on bottom friction and sediment resuspension, 3) flux of two grain sizes from the bed, and 4) resuspension, transport, and deposition of suspended-sediment. Lake Signell derives its name from the paper by Signell et al. (1990) Journal of Geophysical Research 95(C6): 9671-9673.

Model Parameters

The following parameters were used for the Lake Signell sediment test case.

Model Parameter	Variable	Value
length, width, depth	Xsize, Esize, depth	50000 m, 10000 m, 18 - 2 m
settle velocity	$w_{s}$	1.0 $mm/s$
density	$\rho _{s}$	2650 $kg/m^{3}$
critical stresses	$\tau _{ce}$	0.05 $N/m^{2}$
Thickness	bed_thick	0.05 $N/m^{2}$
Erosion rate	$E_{0}$	$5x10^{-5}kg/m^{2}/s$
Wind speed		13 m/s
RMS Wave height		0.5 m
Period	$T$	$5s$
Bottom roughness	$Z_{0}$	$0.015m$
Surface roughness	$Z_{0S}$	$0.02m$