The two last-mentioned have each a total capacity of about 24 hours’
dry-weather flow.
[Illustration: FIG. 16.]
[Illustration: FIG. 16.]
In all these five types of tanks the method of construction is very
similar, generally rectangular in plan and of a moderate depth. As a
rule they are connected by means of a supply channel to the preceding
detritus tanks, and the total capacity is divided up into a number of
units varying with the size of the scheme. The Royal Commission suggest
the following divisions:—