Stored
Waters - Inland waters held in ponds, lakes or reservoirs represent stored waters. Storage generally reduces the numbers of organisms in water. A certain degree (If purity and stability is established.
Several
factors
affect
the
microbial
flora
of
stored
waters.
These
are
as
follows
Sedimentation:
Microorganisms have a specific gravity slightly greater than that of' water, and therefore slowly settle down. However, the most important factor is their attachment to suspended particles. Microorganisms are removed from the upper layers of the water as the suspended particles settle down.
Activities of other organisms:
Predatory Protozoa engulf living or dead bacteria for food, provided the water contains sufficient dissolved oxygen.
