name	unit	description
kWat	1/d	decay constant in water
kSed	1/d	decay constant in sediment
kDif	m2/d	diffusion coefficient
hDif	m	diffusion distance
por	-	porosity of sediment
uSet	m/d	effective settling velocity
zWat	m	depth of water column
zSed	m	thickness of sediment layer
vol	m3	volume of water body
s_x	mol/mol	stoichiometric ratio s:x
