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SED2D-WES Version 4.3 Beta

α1

= coefficient for the source term 1/sec

α2

C

= Chezy roughness coefficient

= concentration of sediment, kg/m3

c

CME

= coefficient of 1 for metric units and l.486 for English units

Cc

= critical concentration = 300 mg/l

Cd

= coefficient for deposition

Ce

= coefficient for entrainment

Ceq

= equilibrium concentration

$

C

= approximate concentration in an element as evaluated from the shape functions and nodal point values

of c

D

= water depth

Ds

= effective grain size

= effective diffusion coefficient in x-direction, m2/sec

Dx

= effective diffusion coefficient in y-direction, m2/sec

Dy

DT

= computation time interval

t

= time

f(t)

= time-varying characteristic

fc

= shear stress coefficient for currents

fw

= shear stress coefficient for waves

GP

= transport potential

GS

= transport capacity

g

= acceleration due to gravity

i

= number of grain size class

M

= consolidation coefficient

N

= quadratic shape functions

NE

= total number of elements

NL

= total number of boundary segments

n

= Mannings roughness value

P

= erosion rate constant

PI

= percent of bed surface covered by grain size, expressed as a function

)

(

)

= C ∆t + α 2 for the transient problem

Q

qis

= flux from source on boundary i

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