Environmental Engineering Reference
In-Depth Information
Figure 3.2
Mesoscale: Mesocosm study displaying laboratory work at the bench level
at the Hazardous Waste Research Center, ERDC.
3.5.3 Macroscale phenomena
The macroscale is the scale at which advective or mixing phenomena can be
observed. The dimension of this scale is 10-2 to 102 m or larger and incor-
porates the entire field site (Figure 3.3). When assessing the limiting factors
at this scale, the underlying question is:
Are the conditions optimal for the bugs
to work?
Other associated issues that pertain to the scale include the following:
the impact of spatial heterogeneity on bioremediation of the site, the effects
of advective-dispersive transport on the rate of biodegradation at the site,
and the ability of an engineered system to effectively influence the limiting
phenomena.
3.6 Relationship between scales of observation
The three scales of observation have been developed in order to organize
and identify limiting phenomena that may apply to implementation of
